Wossner Are the Innovative Specialists for High Performance Pistons, Conrods, Gaskets. The Wossner 2025 Bike Catalogue.
POWERSPORTS CATALOGUE 2025
WÖSSNER GROUP
WE ARE THE INNOVATIVE SPECIALISTS FOR HIGH PERFORMANCE PISTONS, CONRODS, GASKETS AND VALVES. Our products are to be found in engines operating at the highest levels of Wössner products are the source of the superior power behind
the success of well known motorsport teams at national and international race meets, and with distribution points and warehouses in Europe, North America and Asia our products are just a phone call away.
motorsport, in competition and, of course, in everyday use – in fact, anywhere, where longevity, highest performance and operational noise are important factors.
2
FORGING GROUP MONALE
Forging Group Monale was born in July 2009 when Mr. Wössner (owner of Wössner GmbH) bought an Italian aluminum forging company.
trimming, heat treatment, tumbling and pickling. Quality department support the production with the Scan Laser for the dimensional check, with the automatic Crack Test equipment, with the Spectrometer and hardness equipment. We certify our forged parts and we guarantee traceability. FGM can offer also machined and assembled parts, machining, anodizing and shot blasting. External suppliers make these. We are able to forge very small parts (few grams) as well as big parts (10/12 Kg). Our forging presses are as follows: Nº 3 hydraulic presses 1.000 Tons/each
Considering equipment’s presses and knowledge, we decided to enter in every field where forged parts are needed. We supply more than 50% abroad. We are a small company; this allowed us to give to our customers a very good service in term of reactivity, flexibility, competiveness and quality. We are certified ISO 9001:2015 and we adopted, from many years, the Organization Model 231. We buy raw material in according to the Certify 3.1 and, when requested, raw material checked by Ultrasonic Test class “A” and “AA”. Alloys that we normally forge are 2014, 2024, 2618, 4032, 6060, 6082, 7003, 7020, 7022, 7055 and 7075. We are able to produce raw parts with the complete forging process, it means that in FGM we can saw billets and below provide for pre heating, forging,
Nº 1 Screw press 300 Tons Nº 1 Screw press 600 Tons Nº 1 Screw press 800 Tons Nº 2 Screw presses 1.400 Tons
Every press has his pre heating oven. We have also mechanical presses from 60 Tons to 200 Tons for trimming.
3
70'S FOUNDATION OF WÖSSNER At the end of the 70's, Eckart Wössner starts by importing pistons into Germany.
FOUNDATION OF WÖSSNER ASIA Headquartered in Taichung. Wössner pistons are still produced exclusively in Germany.
FORWARD IN MONALE Wössner acquires its own smithy and thereby secures the quality of its metals: FGM Forging Group Monale now belongs to the Wössner Group.
GROWTH DEMAND Wössner's expansive development requires an increase in the production area to fourfold in early 2003.
2003
2009
2015
1994
2005
2011
FOUNDATION OF WÖSSNER USA WEST COAST DIVISION Wössner Group USA expands in 2005 with the founding of Wössner USA Inc. in California.
FOUNDATION OF WÖSSNER ITALIA The growing demand for high-performance forging pistons led to the founding of Wössner Italia Srl. in Monale.
OWN PISTONS The in-house production of forging pistons took place in the 1990s, in 1994 the foundation stone for Wössner GmbH was laid.
4
40TH ANNIVERSARY One year after moving into the new headquarters, Wössner celebrates its 40th anniversary in March 2019. What began as a one-man business developed over decades into a globally operating company, which is constantly expanding.
RESTRUCTURING OF WÖSSNER USA TO WÖSSNER N.A. INC Wössner USA has been restructured with the creation of Wössner N.A. Inc with all locations being consolidated to Wössner N.A. Inc Corporate Headquarters in Willoughby, Ohio Division in Ohio.
2017
2019
2016
2018
2020
START OF CONSTRUCTION OF THE NEW COMPANY CENTER WÖSSNER LTD. Located in Konrad-Zuse- Strasse in Haltingen / Weil am Rhein. It was completed in February 2018.
COMPLETION AND MOVE INTO THE NEW HEADQUARTERS OF WÖSSNER GMBH Wössner GmbH moves to the new headquarters in Haltingen / Weil am Rhein, significantly increasing production.
2020 FOUNDATION OF WÖSSNER UK Wössner UK is founded and moves into a new facility, increasing stock and reducing lead times on deliveries.
Wössner USA gets ready to produce the first ever Wossner pistons, outside of Europe 2022
5
CONTENTS
008 BetaMotor 2-stroke 012 BetaMotor 4-stroke 016 CAN-AM 018 Cobra 020 Derbi 4-stroke 022 Fantic 2-stroke 026 Fantic 4-stroke 028 GasGas 2-stroke 042 GasGas 4-stroke 054 GM Speedway 056 Honda 2-stroke 070 Honda 4-stroke 088 Husaberg 2-stroke 090 Husaberg 4-stroke 098 Husqvarna 2-stroke 116 Husqvarna 4-stroke 134 Kawasaki 2-stroke 148 Kawasaki 4-stroke
6
166 KTM 2-stroke 190 KTM 4-stroke 212 Maico 2-stroke 214 Rieuju 2-strokes 216 Rotax 2-stroke 218 Sherco 2-stroke 220 Sherco 4-stroke 222 Suzuki 2-stroke 238 Suzuki 4-stroke 246 SWM 2-strokes
304 2-stroke
performance kits
306 4-stroke
performance kits 308 2-stroke Con rods 314 4-stroke Con rods 321 Cylinders 321 Crankshafts 323 Oil seals 324 Needle bearings 325 Main bearings 326 Pins 328 Ring packs 330 Rings 333 Piston ring end gap guidelines 334 Locating pin common causes of failure 335 Cylinder finish 336 4-stroke two ring pistons 337 Terms and conditions
248 TM 2-stroke 254 TM 4-stroke
256 Yamaha 2-stroke 282 Yamaha 4-stroke
7
BETAMOTOR 2-STROKE
MODEL
YEARS
PISTON PART #
PISTON SIZE
OVERSIZE
RING SET
STROKE
COMPRESSION HEIGHT
8174DA
53.95
STD
RSV5400
8174DB
53.96
+0.01
RSV5400
8174DC
53.97
+0.02
RSV5400
RR 125 Enduro
2018-2025
54.50
29.50
8174DD
53.98
+0.03
RSV5400
8174D050
54.45
+0.50
RSB5450
8174D100
54.95
+1.00
RSB5500
3002DA
53.95
STD
RSV5400
3002DB
53.96
+0.01
RSV5400
RR 125 Enduro
2018-2025
54.50
29.50
8220DA
53.95
STD
RSV5400
8220DB
53.96
+0.01
RSV5400
8220DC
53.97
+0.02
RSV5400
RR 125 Enduro
2018-2025
54.50
29.50
8220DD
53.98
+0.03
RSV5400
8220D200
54.45
+0.50
RSB5450
8220D400
54.95
+1.00
RSB5500
3009DA
53.95
STD
RSV5400
3009DB
53.96
+0.01
RSV5400
RR 125 Enduro
2018-2025
54.50
29.50
8325DA
61.96
STD
RSB6200
8325DB
61.97
+0.01
RSB6200
RR 200 Enduro
2019-2025
63.00
38.20
8325DC
61.98
+0.02
RSB6200
8
© Wössner ®
PISTON PIN
CLIP
PISTON DETAILS
TOP END BEARING TOP END GASKET KIT CONNECTING ROD MAIN BEARING
CRANKSHAFT
DUAL RING
P2070
MBNJ206
SEMI-KEYSTONE
P2070-R
( MAG )
WP032
CW15
N1010
DXXXX
CS2070
MB63052RS
( PTO )
PREMIUM SERIES PISTON
P2070
MBNJ206
12DEG DOME
P2070-R
( MAG )
WP032
CW15
N1010
DXXXX
CS2070
DUAL RING
SEMI-KEYSTONE
MB63052RS
( PTO )
SINGLE RING
P2070
MBNJ206
SEMI-KEYSTONE
P2070-R
( MAG )
WP032
CW15
N1010
DXXXX
CS2070
MB63052RS
( PTO )
PREMIUM SERIES PISTON
P2070
MBNJ206
12DEG DOME
P2070-R
( MAG )
WP032
CW15
N1010
DXXXX
CS2070
SINGLE RING
SEMI-KEYSTONE
MB63052RS
( PTO )
DUAL RING
MBXXXX
1MM FLAT
( MAG )
WP041
CW16
N1003
DXXXX
PXXX
CSXXXX
MBXXXX
9
© Wössner ®
BETAMOTOR 2-STROKE
MODEL
YEARS
PISTON PART #
PISTON SIZE
OVERSIZE
RING SET
STROKE
COMPRESSION HEIGHT
RR 250 Enduro
2013-2025
8310DA
66.34
STD
RSB6640
Xtrainer 250
2018-2025
8310DB
66.35
+0.01
RSB6640
8310DC
66.36
+0.02
RSB6640
72.00
38.20
RR 300 Enduro
2013-2017
8298DA
71.96
STD
RSB7200
Xtrainer 300
2015-2017
8298DB
71.97
+0.01
RSB7200
72.00
38.00
8298DC
71.98
+0.02
RSB7200
RR 300 Enduro
2018-2021
8309DA
71.96
STD
RSB7200
Xtrainer 300
2018-2021
8309DB
71.97
+0.01
RSB7200
72.00
37.50
RX 300
2021-2024
8309DC
71.98
+0.02
RSB7200
RR 300 Enduro
2022-2025
8324DA
72.96
STD
RSB7300
Xtrainer 300
2022-2025
8324DB
72.97
+0.01
RSB7300
69.90
38,00
8324DC
72.98
+0.02
RSB7300
2017-2025
8333DA
78.95
STD
RSC7900
8333DB
78.96
+0.01
RSC7900
EVO 300 TRIAL
60.50
28.8
10
© Wössner ®
PISTON PIN
CLIP
PISTON DETAILS
TOP END BEARING TOP END GASKET KIT CONNECTING ROD MAIN BEARING
CRANKSHAFT
DUAL RING
P2069
MB6305C3
1MM FLAT
( 2013 - 2017 )
( MAG )
P2073
MB6305C3
WP033
CW18
N1021
DXXXX
CSXXXX
( 2018 - 2021 )
( PTO )
P2081-R
( 2022 - 2025 )
DUAL RING
MB6206C3
1MM FLAT
( MAG )
WP039
CW18
N1020
DXXXX
P2069
CSXXXX
MB6206C3
( PTO )
DUAL RING
MB6206C3
1MM FLAT
( MAG )
P2073 ( 2018 - 2021 )
WP042
CW18
N1021
DXXXX
CSXXXX
MB6206C3
( PTO )
DUAL RING
MBXXXX
1MM FLAT
( MAG )
WP033
CW18
N1024
DXXXX
P2081-R
CSXXXX
MBXXXX
( PTO )
MBXXXX
( MAG )
WP039
CW18
DUAL RING
N1024
DXXXX
P2081-R
CSXXXX
MBXXXX
( PTO )
11
© Wössner ®
BETAMOTOR 4-STROKE
MODEL
YEARS
PISTON PART # WÖSSNER COMPR. RATIO OEM COMPR. RATIO
PISTON SIZE
OVERSIZE
RING SET
RR 250 Enduro
2005-2007
8592DA
74.95
STD
750XDS-3
RR 250 Enduro
2015-2019
8592DB
74.96
+0.01
750XDS-3
12.8:1
12.0:1
4019DA
87.96
STD
RR-S 350 Enduro
2015-2023
4019DB
13.4:1
13.19:1
87.97
+0.01
TPR88.00/2
4014DA
87.96
STD
RR-S 390 Enduro
2016-2023
4014DB
12.7:1
12.48:1
87.97
+0.01
TPR88.00/2
4007DA
94.96
STD
RR-S 430 Enduro
2016-2023
4007DB
12.5:1
12.30:1
94.97
+0.01
RIK95.00/2
8581DA
88.96
STD
8581DB
88.97
+0.01
RR 450 Enduro
2005-2009
8581DC
11.1:1
11.0:1
88.98
+0.02
890XSY-3
4013DA
99.96
STD
4013DB
99.97
+0.01
RR-S 480 Enduro
2016-2023
12.3:1
11.86:1
1000ADS-2
12
© Wössner ®
COMPRESSION HEIGHT
STROKE
PISTON PIN
CLIP
PISTON DETAILS
TOP END GASKET KIT CONNECTING ROD MAIN BEARING
CRANKSHAFT
PRO SERIES
P4048
MBNJ206
SLIPPER STYLE
( MAG )
56.5
25.30
WP029-SP
CW20
DXXXX
CSXXXX
MBNJ206
( POT )
PRO SERIES
57.40
26.00
WP072-SP
CW18
DOUBLE BRIDGED
DXXXX
PXXXX
MBXXXX
CSXXXX
GAS PORTING
PRO SERIES
63.40
22.50
WP072-SP
CW18
DOUBLE BRIDGED
DXXXX
PXXXX
MBXXXX
CSXXXX
GAS PORTING
PRO SERIES
60.84
23.80
WP028-SP
CW19
DOUBLE BRIDGED
DXXXX
PXXXX
MBXXXX
CSXXXX
GAS PORTING
MBNJ206
( MAG )
72.00
23.50
WP038-SP
CW20
SLIPPER STYLE
DXXXX
P4048
CSXXXX
MBNJ206
( POT )
PRO SERIES
MBXXXX
DOUBLE BRIDGED
( MAG )
60.80
23.45
WP028-SP
CW19
DXXXX
PXXXX
CSXXXX
GAS PORTING
MBXXXX
( POT )
13
© Wössner ®
BETAMOTOR 4-STROKE
MODEL
YEARS
PISTON PART # WÖSSNER COMPR. RATIO OEM COMPR. RATIO
PISTON SIZE
OVERSIZE
RING SET
8547DA
94.95
STD
RIK95.00/2
8547DB
94.96
+0.01
RR 525 Enduro
2005-2009
8547DC
11.0:1
11.0:1
94.97
+0.02
8547D200
96.95
+2.00
RIK97.00/2
8637DA
94.95
STD
RIK95.00/2
8637DB
94.96
+0.01
RR 525 Enduro
2005-2009
8637DC
12.5:1
11.0:1
94.97
+0.02
8637D200
96.95
+2.00
RIK97.00/2
14
© Wössner ®
COMPRESSION HEIGHT
STROKE
PISTON PIN
CLIP
PISTON DETAILS
TOP END GASKET KIT CONNECTING ROD MAIN BEARING
CRANKSHAFT
DOUBLE BRIDGED
MBNJ206
RIKEN RING
( MAG )
72.00
23.50
WP073-SP
CW20
DXXXX
P4048
CSXXXX
MBNJ206
( POT )
PRO SERIES
MBNJ206
DOUBLE BRIDGED
( MAG )
72.00
23.50
WP073-SP
CW20
RIKEN RING
DXXXX
P4048
CSXXXX
MBNJ206
( POT )
15
© Wössner ®
CAN-AM
MODEL
YEARS
PISTON PART #
PISTON SIZE
OVERSIZE
RING SET
STROKE
COMPRESSION HEIGHT
125 MX
1974-1981
8288DA
53.95
STD
RSB5400
125 TNT
1974
8288D050
54.45
+0.50
RSB5450
54.00
29.00
125 QUALIFIER
1977-1981
8288D100
54.95
+1.0
RSB5500
125 FUN
1978
175 MX
1974-1977
8289DA
61.94
STD
RSB6200
175 TNT
1974-1977
8289D050
62.44
+0.50
RSB6250
57.50
30.00
175 QUALIFIER
1977-1981
8289D100
62.94
+1.0
RSB6300
8289D150
63.44
+1.50
RSB6350
250 MX
1974-1977
8290DA
73.93
STD
RSB7400
250 TNT
1974-1977
8290D050
74.43
+0.50
RSB7450
57.50
34.00
250 QUALIFIER
1977
8290D100
74.93
+1.0
RSB7500
8290D150
75.43
+1.50
RSB7550
8290D200
75.93
+2.0
RSB7600
16
© Wössner ®
PISTON PIN
CLIP
PISTON DETAILS
TOP END BEARING TOP END GASKET KIT
CONNECTING ROD
MAIN BEARING
CRANKSHAFT
SINGLE RING
MBNXXX
1MM FLAT
( MAG )
WP117
CW18
NXXX
DXXXX
PXXX
CSXXXX
MBXXXX
( PTO )
DUAL RING
MBNXXX
1MM FLAT
( MAG )
WP040
CW18
WITH INTAKE
NXXX
DXXXX
PXXX
CSXXXX
WINDOW
MBXXXX
( PTO )
DUAL RING
MBNXXX
1MM FLAT
( MAG )
WP033
CW18
NXXX
DXXXX
PXXX
CSXXXX
MBXXXX
( PTO )
17
© Wössner ®
COBRA
MODEL
YEARS
PISTON PART #
PISTON SIZE
OVERSIZE
RING SET
STROKE
COMPRESSION HEIGHT
8326DA
44.45
STD
RSB4450
8326DB
44.46
+0.01
RSB4450
CX 65
2018-2024
8326DC
44.47
+0.02
RSB4450
41.70
23.30
18
© Wössner ®
PISTON PIN
CLIP
PISTON DETAILS
TOP END BEARING TOP END GASKET KIT
CONNECTING ROD
MAIN BEARING
CRANKSHAFT
DUAL RING
MBNXXX
1MM FLAT
( MAG )
WP091
CW12
N1036
DXXXX
PXXXX
CSXXXX
MBXXXX
( PTO )
19
© Wössner ®
DERBI 4-STROKE
MODEL
YEARS
PISTON PART # WÖSSNER COMPR. RATIO OEM COMPR. RATIO
PISTON SIZE
OVERSIZE
RING SET
8617DA
99.95
STD
GNH100.00
8617D100
100.95
+1.00
GNH101.00
MULHACIEN 659
2006-2008
8617D200
11.0:1
10.0:1
101.95
+2.00
GNH102.00
8617D300
102.95
+3.00
GNH103.00
8617D400
103.95
+4.00
GNH104.00
20
© Wössner ®
COMPRESSION HEIGHT
STROKE
PISTON PIN
CLIP
PISTON DETAILS
TOP END GASKET KIT CONNECTING ROD MAIN BEARING
CRANKSHAFT
PRO SERIES
MBXXXX
SLIPPER STYLE
( MAG )
84.00
27.50
WP024-SP
CW23
SECOND NAPPIER RING
DXXXX
PXXXX
CSXXXX
MBXXXX
( POT )
21
© Wössner ®
FANTIC 2-STROKE
MODEL
YEARS
PISTON PART #
PISTON SIZE
OVERSIZE
RING SET
STROKE
COMPRESSION HEIGHT
XE 125
2021-2022
8160DA
53.95
STD
RSB5400
XX 125
2021-2022
8160DB
53.96
+0.01
RSB5400
54.50
28.00
8160DC
53.97
+0.02
RSB5400
8160D200
55.95
+2.0
RSB5600
8160D400
57.95
+4.0
RSB5800
XE 125
2021-2022
8302DA
53.95
STD
RSV5400
XX 125
2021-2022
8302DB
53.96
+0.01
RSV5400
54.50
28.00
8302DC
53.97
+0.02
RSV5400
8302D200
55.95
+2.0
RSB5600
8302D400
57.95
+4.0
RSB5800
XE 125
2021-2022
3004DA
53.95
STD
RSV5400
XX 125
2021-2022
3004DB
53.96
+0.01
RSV5400
54.50
28.00
XE 125
2021-2022
5003DA
53.95
STD
RSV5400
XX 125
2021-2022
5003DB
53.96
+0.01
RSV5400
54.50
28.00
XE 125
2023-2025
8321DA
53.95
STD
RSB5400
XX 125
2023-2025
8321DB
53.96
+0.01
RSB5400
8321DC
53.97
+0.02
RSB5400
54.50
28.00
8321D100
54.95
+1.0
RSB5500
8321D200
55.95
+2.0
RSB5600
8321D400
57.95
+4.0
RSB5800
22
© Wössner ®
PISTON PIN
CLIP
PISTON DETAILS
TOP END BEARING TOP END GASKET KIT
CONNECTING ROD
MAIN BEARING
CRANKSHAFT
MBNXXX
( MAG )
WP032
CW15
SINGLE RING
N1047
DXXXX
P2018
CS2018
MBXXXX
( PTO )
MBNXXX
( MAG )
WP032
CW15
DUAL RING
N1047
DXXXX
P2018
CS2018
MBXXXX
( PTO )
PREMIUM SERIES
MBNXXX
SINGLE RING
( MAG )
WP032
CW15
N1047
DXXXX
P2017-R
CSXXXX
12DEG DOME
+3mm LONGER ROD
MBXXXX
( PTO )
PREMIUM PLUS SERIES
MBNXXX
SINGLE RING
( MAG )
WP032
CW15
N1047
DXXXX
P2017-R
CSXXXX
12DEG DOME
+3mm LONGER ROD
MBXXXX
NANODISP PLATING
( PTO )
MBNXXX
( MAG )
WP032
CW15
SINGLE RING
N1047
DXXXX
P2077
CS2077
MBXXXX
( PTO )
23
© Wössner ®
FANTIC 2-STROKE
MODEL
YEARS
PISTON PART #
PISTON SIZE
OVERSIZE
RING SET
STROKE
COMPRESSION HEIGHT
XE 125
2023-2025
8331DA
53.95
STD
RSB5400
XX 125
2023-2025
8331DB
53.96
+0.01
RSB5400
54.50
28.00
8331DC
53.97
+0.02
RSB5400
XE 125
2023-2025
5001DA
53.95
STD
RSV5400
XX 125
2023-2025
5001DB
53.96
+0.01
RSV5400
54.50
28.00
8216DA
66.35
STD
RSB6640
8216DB
66.36
+0.01
RSB6640
8216DC
66.37
+0.02
RSB6640
XX 250
2021-2022
8216D060
66.95
+0.60
RSB6700
68.00
38.00
8216D110
67.45
+1.10
RSB6750
8216D210
68.45
+2.10
RSB6850
8216D560
71.95
+5.60
RSB7200
8217DA
66.35
STD
RSB6640
8217DB
66.36
+0.01
RSB6640
XX 250
2021-2022
68.00
38.00
24
© Wössner ®
PISTON PIN
CLIP
PISTON DETAILS
TOP END BEARING TOP END GASKET KIT
CONNECTING ROD
MAIN BEARING
CRANKSHAFT
MBNXXX
( MAG )
WP032
CW15
DUAL RING
N1047
DXXXX
P2077
CS2077
MBXXXX
( PTO )
PREMIUM PLUS SERIES
WP032
MBNXXX
SINGLE RING
( MAG )
CW15
N1047
DXXXX
P2077
CS2077
12DEG DOME ?
NANODISP PLATING
MBXXXX
2618-T6 ALLOY
( PTO )
DUAL RING
MBNXXX
WITH INTAKE
( MAG )
WINDOW
WP033
CW18
N1021
DXXXX
P2028
MBXXXX
CS2028
( PTO )
SINGLE RING
MBNXXX
WITH INTAKE
( MAG )
WP033
CW18
N1021
DXXXX
P2028
CS2028
WINDOW
MBXXXX
( PTO )
25
© Wössner ®
FANTIC 4-STROKE
MODEL
YEARS
PISTON PART # WÖSSNER COMPR. RATIO OEM COMPR. RATIO
PISTON SIZE
OVERSIZE
RING SET
XXF 250
2022
8957DA
76.96
STD
RIK77.00D
XEF 250
2022
8957DB
76.97
+0.01
RIK77.00D
14.0:1
13.8:1
8957DC
XXF 250
2022
8963DA
76.96
STD
RIK77.00D
XEF 250
2022
8963DB
76.97
+0.01
RIK77.00D
14.2:1
13.8:1
8963DC
XXF 450
2022
8964DA
96.96
STD
RIK97.00
XEF 450
2022
8964DB
96.97
+0.01
RIK97.00
13.2:1
13.0:1
8964DC
96.98
+0.02
RIK97.00
XXF 450
2022
8965DA
96.96
STD
RIK97.00/2
XEF 450
2022
8965DB
96.97
+0.01
RIK97.00/2
13.2:1
13.0:1
8965DC
96.98
+0.02
RIK97.00/2
26
© Wössner ®
COMPRESSION HEIGHT
STROKE
PISTON PIN
CLIP
PISTON DETAILS
TOP END GASKET KIT CONNECTING ROD MAIN BEARING
CRANKSHAFT
DOUBLE BRIDGE
DXXXX
P4072
MBNJ206
3D CROWN
P4072-R
( MAG )
53.6
20.40
WP070-SP
CW16
CS4072
MBNJ206
( POT )
PRO SERIES
P4072
MBNJ206
DOUBLE BRIDGE
P4072-R
( MAG )
53.6
20.40
WP070-SP
CW16
3D CROWN
DXXXX
CS4072
GAS PORTING
MBNJ206
( POT )
DOUBLE BRIDGE
DXXXX
MBNJ206
3D CROWN
( MAG )
60.9
24.00
WP072-SP
CW18
THREE RING DESIGN
P4085
CSXXXX
MBNJ206
( POT )
DOUBLE BRIDGE
MBNJ206
3D CROWN
( MAG )
60.9
24.00
WP072-SP
CW18
TWO RING DESIGN
DXXXX
P4085
CSXXXX
MBNJ206
( POT )
27
© Wössner ®
GASGAS 2-STROKE
MODEL
YEARS
PISTON PART #
PISTON SIZE
OVERSIZE
RING SET
STROKE
COMPRESSION HEIGHT
8262DA
39.46
STD
RSB3950
8262DB
39.47
+0.01
RSB3950
MC 50
2021 - 2025
8262DC
39.48
+0.02
RSB3950
40.00
21.60
8241DA
44.96
STD
RSV4500
8241DB
44.97
+0.01
RSV4500
8241DC
44.98
+0.02
RSV4500
MC 65
2021 - 2025
40.80
21.60
8241DD
44.99
+0.03
RSV4500
8241DE
45.00
+0.04
RSV4500
8241D200
46.96
+2.00
RSV4700
5006DA
44.96
STD
RSV4500
5006DB
44.97
+0.01
RSV4500
MC 65
2021 - 2025
40.80
21.60
8147DA
46.95
STD
RSV4700
48.95
8147DB
46.96
+0.01
RSV4700
8147DC
46.97
+0.02
RSV4700
MC 85
2021 - 2025
24.00
8147DD
46.98
+0.03
RSV4700
8147DE
46.99
+0.04
RSV4700
8147DF
47.00
+0.05
RSV4700
8147DG
47.01
+0.06
RSV4700
28
© Wössner ®
PISTON PIN
CLIP
PISTON DETAILS
TOP END BEARING TOP END GASKET KIT CONNECTING ROD MAIN BEARING
CRANKSHAFT
SINGLE RING
MB6203C3
1MM FLAT
( MAG )
WP101
CW12
N1001
DXXXX
P2053
CSXXXX
MB6203C3
( POT )
SINGLE RING
MB6304C3
SEMI-KEYSTONE
( MAG )
WP091
CW12
N1037
DXXXX
P2055
CS2055
MB6304C3
( POT )
PREMIUM PLUS SERIES
MB6304C3
12DEG DOME
( MAG )
SEMI-KEYSTONE
WP091
CW12
N1037
DXXXX
P2055
CS2055
NANODISP PLATING
MB6304C3
2618-T6 ALLOY
( POT )
SINGLE RING
SINGLE RING
MB6304C3
SEMI-KEYSTONE
( MAG )
WP058
CW14
N1006
DXXXX
P2065
MB6304C3
CS2065-2
( POT )
29
© Wössner ®
GASGAS 2-STROKE
MODEL
YEARS
PISTON PART #
PISTON SIZE
OVERSIZE
RING SET
STROKE
COMPRESSION HEIGHT
3011DA
46.95
STD
RSV4700
3011DB
46.96
+0.01
RSV4700
MC 85
2021 - 2025
48.95
24.00
3001DA
46.95
STD
RSV4700
3001DB
46.96
+0.01
RSV4700
MC 85
2021 - 2025
48.95
24.00
5008DA
46.95
STD
RSV4700
5008DB
46.96
+0.01
RSV4700
MC 85
2021 - 2025
48.95
24.00
5010DA
46.95
STD
RSV4700
5010DB
46.96
+0.01
RSV4700
MC 85
2021 - 2025
48.95
24.00
8328DA
46.95
STD
RSV4700
8328DB
46.96
+0.01
RSV4700
MC 85
2021 - 2025
8328DC
46.97
+0.02
RSV4700
48.95
24.00
30
© Wössner ®
PISTON PIN
CLIP
PISTON DETAILS
TOP END BEARING TOP END GASKET KIT CONNECTING ROD MAIN BEARING
CRANKSHAFT
PREMIUM SERIES
MB6304C3
12DEG DOME
( MAG )
WP058
CW14
N1006
DXXXX
P2065-R
CSXXXX
SINGLE RING
SEMI-KEYSTONE
MB6304C3
( POT )
PREMIUM SERIES
MB6304C3
12DEG DOME
( MAG )
WP058
CW14
N1006
DXXXX
P2065-R
CSXXXX
DUAL RING
SEMI-KEYSTONE
MB6304C3
( POT )
PREMIUM PLUS SERIES
MB6304C3
12DEG DOME
( MAG )
SINGLE RING
WP058
CW14
N1006
DXXXX
P2065-R
CSXXXX
SEMI-KEYSTONE
MB6304C3
NANODISP PLATING
( POT )
2618-T6 ALLOY
PREMIUM PLUS SERIES
MB6304C3
12DEG DOME
( MAG )
DUAL RING
WP058
CW14
N1006
DXXXX
P2065-R
CSXXXX
SEMI-KEYSTONE
MB6304C3
NANODISP PLATING
( POT )
2618-T6 ALLOY
DUAL RING
MB6304C3
SEMI-KEYSTONE
( MAG )
WP058
CW14
N1006
DXXXX
P2065
CS2065-2
MB6304C3
( POT )
31
© Wössner ®
GASGAS 2-STROKE
MODEL
YEARS
PISTON PART #
PISTON SIZE
OVERSIZE
RING SET
STROKE
COMPRESSION HEIGHT
8315DA
51.95
STD
RSB5200
8315DB
51.96
+0.01
RSB5200
MC 85 BIG BORE 105cc
2021 - 2025
8315DC
51.97
+0.02
RSB5200
49.00
24.00
8329DA
51.95
STD
RSB5200
8329DB
51.96
+0.01
RSB5200
MC 85 BIG BORE 105cc
2021 - 2025
8329DC
51.97
+0.02
RSB5200
49.00
24.00
8079DA
53.95
STD
RSB5400
8079DB
53.96
+0.01
RSB5400
EC 125
2000 - 2011
8079DC
53.97
+0.02
RSB5400
54.50
28.00
8080DA
53.95
STD
RSB5400
8080DB
53.96
+0.01
RSB5400
MC 125
2000 - 2011
8080DC
53.97
+0.02
RSB5400
54.50
28.00
MC 125
8220DA
53.95
STD
RSV5400
EC 125
8220DB
53.96
+0.01
RSV5400
8220DC
53.97
+0.02
RSV5400
2021 - 2025
54.50
29.50
8220DD
53.98
+0.03
RSV5400
8220DE
53.99
+0.04
RSV5400
8220D200
55.95
+2.00
RSB5600
8220D400
57.95
+4.00
RSB5800
32
© Wössner ®
PISTON PIN
CLIP
PISTON DETAILS
TOP END BEARING TOP END GASKET KIT CONNECTING ROD MAIN BEARING
CRANKSHAFT
SINGLE RING
MB6304C3
107grams
( MAG )
WP063
CW14
N1006
DXXXX
P2065
CS2065-2
MB6304C3
( POT )
DUAL RING
MB6304C3
105grams
( MAG )
WP063
CW14
N1006
DXXXX
P2065
CS2065-2
MB6304C3
( POT )
SINGLE RING
?
1MM FLAT
( MAG )
WP032
CW15
N1011
DXXXX
PXXXX
CSXXXX
?
( POT )
DUAL RING
?
1MM FLAT
( MAG )
WP032
CW15
N1011
DXXXX
PXXXX
CSXXXX
?
( POT )
MB6304C3
( MAG )
MB6305JR2
WP032
CW15
SINGLE RING
N1010
DXXXX
P2070
CS2070
( POT )
33
© Wössner ®
GASGAS 2-STROKE
MODEL
YEARS
PISTON PART #
PISTON SIZE
OVERSIZE
RING SET
STROKE
COMPRESSION HEIGHT
MC 125
8174DA
53.95
STD
RSV5400
EC 125
8174DB
53.96
+0.01
RSV5400
8174DC
53.97
+0.02
RSV5400
2021 - 2025
54.50
29.50
8174DD
53.98
+0.03
RSV5400
8174D050
54.45
+0.50
RSB5450
8174D100
54.95
+1.00
RSB5500
MC 125
3009DA
53.95
STD
RSV5400
EC 125
3009DB
53.96
+0.01
RSV5400
2021 - 2025
54.50
29.50
MC 125
3002DA
53.95
STD
RSV5400
EC 125
3002DB
53.96
+0.01
RSV5400
2021 - 2025
54.50
29.50
MC 125
5002DA
53.95
STD
RSV5400
EC 125
5002DB
53.96
+0.01
RSV5400
2021 - 2025
54.50
29.50
MC 125
5004DA
53.95
STD
RSV5400
EC 125
5004DB
53.96
+0.01
RSV5400
2021 - 2025
54.50
29.50
34
© Wössner ®
PISTON PIN
CLIP
PISTON DETAILS
TOP END BEARING TOP END GASKET KIT CONNECTING ROD MAIN BEARING
CRANKSHAFT
MB6304C3
( MAG )
WP032
CW15
Dual Ring
N1010
DXXXX
P2070
CS2070
MB6305JR2
( POT )
PREMIUM SERIES
MB6304C3
12DEG DOME
( MAG )
WP032
CW15
N1010
DXXXX
P2070-R
CSXXXX
SINGLE RING
SEMI-KEYSTONE
MB6305JR2
( POT )
PREMIUM SERIES
MB6304C3
12DEG DOME
( MAG )
WP032
CW15
N1010
DXXXX
P2070-R
CSXXXX
DUAL RING
SEMI-KEYSTONE
MB6305JR2
( POT )
PREMIUM PLUS SERIES
MB6304C3
12DEG DOME
( MAG )
DUAL RING
WP032
CW15
N1010
DXXXX
P2070-R
CSXXXX
SEMI-KEYSTONE
MB6305JR2
NANODISP PLATING
( POT )
2618-T6 ALLOY
PREMIUM PLUS SERIES
MB6304C3
12DEG DOME
( MAG )
SINGLE RING
WP032
CW15
N1010
DXXXX
P2070-R
CSXXXX
SEMI-KEYSTONE
MB6305JR2
NANODISP PLATING
( POT )
2618-T6 ALLOY
35
© Wössner ®
GASGAS 2-STROKE
MODEL
YEARS
PISTON PART #
PISTON SIZE
OVERSIZE
RING SET
STROKE
COMPRESSION HEIGHT
8218DA
53.95
STD
RSB5400
8218DB
53.96
+0.01
RSB5400
TXT 125 TRIALS
2003-2009
8218DC
53.97
+0.02
RSB5400
54.50
29.50
8299DA
57.95
STD
RSV5800
8299DB
57.96
+0.01
RSV5800
MC 150
2025
8299DC
57.97
+0.02
RSV5800
54.50
29.50
8311DA
57.95
STD
RSV5800
8311DB
57.96
+0.01
RSV5800
MC 150
2025
8311DC
57.97
+0.02
RSV5800
54.50
29.50
EC 200
2000-2014
8139DA
62.45
STD
RSB6250
EC 200 R
2014-2021
8139DB
62.46
+0.01
RSB6250
65.00
32.00
8139DC
62.47
+0.02
RSB6250
8132DA
63.95
STD
RSB6400
8132DB
63.96
+0.01
RSB6400
TXT 200 TRIALS
1999-2006
54.50
30.00
36
© Wössner ®
PISTON PIN
CLIP
PISTON DETAILS
TOP END BEARING TOP END GASKET KIT CONNECTING ROD MAIN BEARING
CRANKSHAFT
DUAL RING
MBXXXX
1MM FLAT
( MAG )
WP036
CW16
NXXXX
DXXXX
PXXXX
CSXXXX
MBXXXX
( POT )
SINGLE RING
?
SEMI-KEYSTONE
( MAG )
WP032
CW15
N1010
DXXXX
P2070
CS2070
?
( POT )
DUAL RING
?
SEMI-KEYSTONE
( MAG )
WP032
CW15
N1010
DXXXX
P2070
CS2070
?
( POT )
DUAL RING
MBXXXX
1MM FLAT
( MAG )
WP040
CW18
N1020
DXXXX
PXXXX
CSXXXX
MBXXXX
( POT )
DUAL RING
MBXXXX
1MM FLAT
( MAG )
WP027
CW16
NXXXX
DXXXX
PXXXX
CSXXXX
MBXXXX
( POT )
37
© Wössner ®
GASGAS 2-STROKE
MODEL
YEARS
PISTON PART #
PISTON SIZE
OVERSIZE
RING SET
STROKE
COMPRESSION HEIGHT
EC 250
1997-2014
8052DA
66.33
STD
RSB6640
EC 250 R
2014-2020
8052DB
66.34
+0.01
RSB6640
72.00
38.00
SM 250
1997-2008
8052DC
66.35
+0.02
RSB6640
MC 250
1997-2008
8052DD
66.36
+0.03
RSB6640
MC 250
2022 - 2025
8169DA
66.34
STD
RSB6640
EX 250
2022- 2024
8169DB
66.35
+0.01
RSB6640
EC 250
2021 - 2024
8169DC
66.36
+0.02
RSB6640
72.00
38.00
8169DD
66.37
+0.03
RSB6640
8169D060
66.94
+0.60
RSB6700
8169D160
67.94
+1.60
RSB6750
8169D210
68.44
+2.10
RSB6850
MC 250
2022 - 2025
3010DA
66.34
STD
RSB6640
EX 250
2022- 2024
3010DB
66.35
+0.01
RSB6640
EC 250
2021 - 2024
72.00
38.00
8163DA
72.46
STD
RSB7250
8163DB
72.47
+0.01
RSB7250
TXT 250 TRIALS
2002-2021
8163DC
72.48
+0.02
RSB7250
60.00
28.75
TXT 280 TRIALS
8144DA
75.96
STD
RSC7600
MT 280
8144DB
75.97
+0.01
RSC7600
ALL YEARS
60.00
28.75
8144DC
75.98
+0.02
RSC7600
38
© Wössner ®
PISTON PIN
CLIP
PISTON DETAILS
TOP END BEARING TOP END GASKET KIT CONNECTING ROD MAIN BEARING
CRANKSHAFT
DUAL RING
MBXXXX
1MM FLAT
( MAG )
WP033
CW18
N1021
DXXXX
P2021
CSXXXX
MBXXXX
( POT )
DUAL RING
MB6305C3
1MM FLAT
( MAG )
WP033
CW18
N1020
DXXXX
P2023
MB6305C3
CS2023
( POT )
PREMIUM SERIES
MB6305C3
12DEG DOME
( MAG )
WP033
CW18
SINGLE RING
N1020
DXXXX
P2023-R
CSXXXX
MB6305C3
( POT )
DUAL RING
MBXXXX
1MM FLAT
( MAG )
WP033
CA18
NXXXX
DXXXX
PXXXX
CSXXXX
MBXXXX
( POT )
DUAL RING
MBXXXX
1.2MM FLAT
( MAG )
WP033
CA18
NXXXX
DXXXX
PXXXX
CSXXXX
MBXXXX
( POT )
39
© Wössner ®
GASGAS 2-STROKE
MODEL
YEARS
PISTON PART #
PISTON SIZE
OVERSIZE
RING SET
STROKE
COMPRESSION HEIGHT
8145DA
78.96
STD
RSC7900
8145DB
78.97
+0.01
RSC7900
TXT 300 TRIALS
ALL YEARS
8145DC
78.98
+0.02
RSC7900
60.00
28.75
EC 300 R
2014-2020
8077DA
71.93
STD
RSB7200
EC 300
2000-2014
8077DB
71.94
+0.01
RSB7200
72.50
38.00
XC 300
2014-2020
8077DC
71.95
+0.02
RSB7200
EC 300
2021 - 2025
8327DA
71.93
STD
RSB7200
EX 300
2021 - 2025
8327DB
71.94
+0.01
RSB7200
72.00
38.00
MC 300
2025
8327DC
71.95
+0.02
RSB7200
EC 300
2021 - 2025
5007DA
71.93
STD
RSB7200
EX 300
2021 - 2025
5007DB
71.94
+0.01
RSB7200
72.00
38.00
MC 300
2025
71.95
+0.02
RSB7200
8145DA
78.96
STD
RSC7900
8145DB
78.97
+0.01
RSC7900
TXT 300 TRIALS
ALL YEARS
8145DC
78.98
+0.02
RSC7900
60.00
28.75
40
© Wössner ®
PISTON PIN
CLIP
PISTON DETAILS
TOP END BEARING TOP END GASKET KIT CONNECTING ROD MAIN BEARING
CRANKSHAFT
DUAL RING
MBXXXX
1.2MM FLAT
( MAG )
WP033
CA18
NXXXX
DXXXX
PXXXX
CSXXXX
MBXXXX
( POT )
DUAL RING
MBXXXX
1MM FLAT
( MAG )
WP033
CW18
N1021
DXXXX
P2021
CSXXXX
MBXXXX
( POT )
DUAL RING
MB6305C3
1MM FLAT
( MAG )
WP033
CW18
N1020
DXXXX
P2023
CS2023
MB6305C3
( POT )
PREMIUM PLUS SERIES
C3623
MB6305C3
DUAL RING
( 2021-2023 )
( MAG )
WP033
CW18
NANODISP PLATING
N1020
P2023-R
CSXXXX
2618-T6 ALLOY
C3811
MB6305C3
( 2024-2025 TBI )
( POT )
DUAL RING
MBXXXX
1.2MM FLAT
( MAG )
WP033
CA18
NXXXX
DXXXX
PXXXX
CSXXXX
MBXXXX
( POT )
41
© Wössner ®
GASGAS 4-STROKE
MODEL
YEARS
PISTON PART # WÖSSNER COMPR. RATIO OEM COMPR. RATIO
PISTON SIZE
OVERSIZE
RING SET
8614DA
76.96
STD
RIK77.00D3
8614DB
76.97
+0.01
RIK77.00D3
EC 250 F
2010-2015
8614DC
12.5:1
12.5:1
76.98
+0.02
RIK77.00D3
8612DA
76.96
STD
RIK77.00D
8612DB
76.97
+0.01
RIK77.00D
EC 250 F
2010-2015
8612DC
13.5:1
12.5:1
76.98
+0.02
RIK77.00D
8865DA
77.96
STD
TPR78.00/2
8865DB
77.97
+0.01
TPR78.00/2
EC 250 F
2021 - 2023
8865DC
13.9:1
13.9:1
77.98
+0.02
TPR78.00/2
8979DA
77.96
STD
TPR78.00/2
8979DB
77.97
+0.01
TPR78.00/2
EC 250 F
2021 - 2023
8979DC
14.23:1
13.9:1
77.98
+0.02
TPR78.00/2
8874DA
77.96
STD
TPR78.00/2
8874DB
77.97
+0.01
TPR78.00/2
EC 250 F
2021 - 2023
14.5:1
13.9:1
8874DC
77.98
+0.02
TPR78.00/2
42
© Wössner ®
COMPRESSION HEIGHT
STROKE
PISTON PIN
CLIP
PISTON DETAILS
TOP END GASKET KIT CONNECTING ROD MAIN BEARING
CRANKSHAFT
DOUBLE BRIDGE
MB830046
RIKEN RING
( MAG )
53.60
22.20
WP070-SP
CW16
THREE RING
DXXXX
P4005
CS4005
MB830046
( POT )
PRO SERIES
MB830046
DOUBLE BRIDGE
( MAG )
53.60
22.20
WP070-SP
CW16
RIKEN RING
DXXXX
P4005
CS4005
GAS PORTING
MB830046
( POT )
DOUBLE BRIDGE
MBNJ206ECP-3
TWO RING
( MAG )
52.30
19.50
WP070-SP
CW16
GAS PORTING
DXXXX
P4059
CSXXXX
MBNJ206ECP-3
( POT )
PRO SERIES
MBNJ206ECP-3
DOUBLE BRIDGE
( MAG )
52.30
19.50
WP070-SP
CW16
TWO RING
DXXXX
P4059
CSXXXX
GAS PORTING
MBNJ206ECP-3
( POT )
PRO SERIES
MBNJ206ECP-3
DOUBLE BRIDGE
( MAG )
52.30
19.50
WP070-SP
CW16
DXXXX
P4059
CSXXXX
TWO RING
GAS PORTING
MBNJ206ECP-3
( POT )
43
© Wössner ®
GASGAS 4-STROKE
MODEL
YEARS
PISTON PART # WÖSSNER COMPR. RATIO OEM COMPR. RATIO
PISTON SIZE
OVERSIZE
RING SET
MC 250 F
2021 - 2023
8923DA
77.96
STD
TPR78.00/2
EX 250 F
2021 - 2023
8923DB
77.97
+0.01
TPR78.00/2
14.4:1
14.4:1
8923DC
77.98
+0.02
TPR78.00/2
MC 250 F
2021 - 2023
8924DA
77.96
STD
TPR78.00/2
EX 250 F
2021 - 2023
8924DB
77.97
+0.01
TPR78.00/2
14.6:1
14.4:1
8924DC
77.98
+0.02
TPR78.00/2
MC 250 F
2021 - 2023
3505DA
77.96
STD
OEM
EX 250 F
2021 - 2023
3505DB
77.97
+0.01
OEM
14.8:1
14.4:1
MC 250 F
2024 - 2025
4077DA
80.95
STD
RIK81.00/2
EX 250 F
2024
4077DB
80.96
+0.01
RIK81.00/2
14.4:1
14.4:1
EC 250 F
2024
4077DC
80.97
+0.02
RIK81.00/2
MC 250 F
2024 - 2025
4090DA
80.95
STD
RIK81.00/2
EX 250 F
2024
4090DB
80.96
+0.01
RIK81.00/2
14.8:1
14.4:1
EC 250 F
2024
4090DC
80.97
+0.02
RIK81.00/2
44
© Wössner ®
Page 1 Page 2 Page 3 Page 4 Page 5 Page 6 Page 7 Page 8 Page 9 Page 10 Page 11 Page 12 Page 13 Page 14 Page 15 Page 16 Page 17 Page 18 Page 19 Page 20 Page 21 Page 22 Page 23 Page 24 Page 25 Page 26 Page 27 Page 28 Page 29 Page 30 Page 31 Page 32 Page 33 Page 34 Page 35 Page 36 Page 37 Page 38 Page 39 Page 40 Page 41 Page 42 Page 43 Page 44 Page 45 Page 46 Page 47 Page 48 Page 49 Page 50 Page 51 Page 52 Page 53 Page 54 Page 55 Page 56 Page 57 Page 58 Page 59 Page 60 Page 61 Page 62 Page 63 Page 64 Page 65 Page 66 Page 67 Page 68 Page 69 Page 70 Page 71 Page 72 Page 73 Page 74 Page 75 Page 76 Page 77 Page 78 Page 79 Page 80 Page 81 Page 82 Page 83 Page 84 Page 85 Page 86 Page 87 Page 88 Page 89 Page 90 Page 91 Page 92 Page 93 Page 94 Page 95 Page 96 Page 97 Page 98 Page 99 Page 100 Page 101 Page 102 Page 103 Page 104 Page 105 Page 106 Page 107 Page 108 Page 109 Page 110 Page 111 Page 112 Page 113 Page 114 Page 115 Page 116 Page 117 Page 118 Page 119 Page 120 Page 121 Page 122 Page 123 Page 124 Page 125 Page 126 Page 127 Page 128 Page 129 Page 130 Page 131 Page 132 Page 133 Page 134 Page 135 Page 136 Page 137 Page 138 Page 139 Page 140 Page 141 Page 142 Page 143 Page 144 Page 145 Page 146 Page 147 Page 148 Page 149 Page 150 Page 151 Page 152 Page 153 Page 154 Page 155 Page 156 Page 157 Page 158 Page 159 Page 160 Page 161 Page 162 Page 163 Page 164 Page 165 Page 166 Page 167 Page 168 Page 169 Page 170 Page 171 Page 172 Page 173 Page 174 Page 175 Page 176 Page 177 Page 178 Page 179 Page 180 Page 181 Page 182 Page 183 Page 184 Page 185 Page 186 Page 187 Page 188 Page 189 Page 190 Page 191 Page 192 Page 193 Page 194 Page 195 Page 196 Page 197 Page 198 Page 199 Page 200Made with FlippingBook - Online catalogs