Wossner
Piston Kits
KTM 2-Stroke Models 300 EXC / EGS / MXC
Years Size 1996 - 03 72mm 2004 - 05 72mm 2006 - 17 72mm 2018 - 23 72mm 1990 - 94 72mm
Piston Kit
Piston Rings 56-R359.WO 56-R359.WO 56-R372 x2
Piston Pin 56-7924.WO 56-7924.WO 56-7924.WO 56-7924.WO
Piston Clips
Small End Bearing
56-W712+00A.WO 56-W858.A.WO 56-W9984.A.WO 56-W9984.A.WO 56-W631.A.WO 56-W154+00A.WO 56-W858.A.WO 56-W9984.A.WO 56-W9984.A.WO 56-W9984.A.WO 56-W9984.A.WO 56-W747+00A.WO 56-W748+00A.WO
56-0153.WO 56-802.WO 56-0153.WO 56-802.WO 56-0153.WO 56-802.WO 56-0153.WO 56-802.WO 56-0153.WO 56-802.WO 56-0153.WO 56-802.WO 56-0153.WO 56-802.WO 56-0153.WO 56-802.WO 56-0153.WO 56-802.WO 56-0153.WO 56-802.WO 56-0153.WO 56-802.WO 56-0153.WO 56-802.WO 56-0153.WO 56-802.WO
300 EXC / MXC
300 EXC
300 EXC TPI 300 MX / GS 300 SX / GS 300 XC / XC-W
56-R372
56-R359.WO 56-R359.WO 56-R359.WO
56-785
1995
72mm
56-7924.WO 56-7924.WO 56-7924.WO 56-7924.WO 56-7924.WO 56-7924.WO
2004 - 05 72mm 2006 - 19 72mm 2020 - 23 72mm 2006 - 18 72mm 2018 - 23 72mm 1996 - 97 78mm 1998 - 02 78mm
300 XC
56-R372 56-R372 56-R372 56-R372 56-R381 56-R381
300 XC TPI 300 XC-W
300 XC-W TPI
360 SX / EGS / EXC 380 SX / EGS / EXC
56-785 56-785 56-7948 56-7948
1976 - 81 82.4mm 56-W9877.050.W 1976 - 81 82.4mm 56-W9877.050.W
– –
56-0153.WO 56-0153.WO
– –
390 (available in 0.5 & 1.0mm oversize) 400 (available in 0.5 & 1.0mm oversize)
KTM 2-Stroke Models 250 EXC F Racing
Years Size
Piston Kit
Piston Rings
Piston Pin 56-7918.WO 56-7981.WO 56-7981.WO 56-7981.WO 56-7981.WO 56-7981.WO 56-7980.WO 56-7931.WO 56-7981.WO 56-7981.WO 56-7981.WO 56-7981.WO 56-7981.WO 56-7981.WO 56-7981.WO 56-7981.WO 56-7981.WO 56-7981.WO 56-7981.WO 56-7981.WO 56-7891.WO 56-7891.WO 56-7975.WO
Piston Clips 56-0155.WO 56-0152.WO 56-0152.WO 56-0152.WO 56-0152.WO 56-0152.WO 56-0152.WO 56-0152.WO 56-0152.WO 56-0152.WO 56-0152.WO 56-0152.WO 56-0152.WO 56-0152.WO 56-0152.WO 56-0152.WO 56-0152.WO 56-0152.WO 56-0152.WO 56-0152.WO 56-0153.WO 56-0153.WO
Small End Bearing
2001 - 06 75mm 56-W029.A
56-R362
– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
250 EXC F Racing Comp. 12.9:1
2007 - 13 76mm 2007 - 13 76mm 2014 - 22 78mm 2014 - 22 78mm
56-W4730+00A.WO 56-W4734+00A.WO
56-R551.WO 56-R551.WO 56-R323.WO 56-R323.WO 56-R323.WO 56-R551.WO 56-R551.WO 56-R323.WO 56-R323.WO 56-R323.WO 56-R323.WO 56-R341.WO
Hi-Comp 14.4:1 Comp. 13.9:1
250 EXC-F
56-W954.A.WO
Hi-Comp 14.5:1 Hi Comp 14.23:1
56-W955.A.WO.HC 56-W9997.WO.A 56-W4730+00A.WO 56-W4734+00A.WO
250 EXC-F 250 SX-F
2020
78mm
Comp. 12.9:1
2006 - 12 76mm 2006 - 12 76mm 2013 - 15 78mm 2013 - 15 78mm 2016 - 22 78mm 2016 - 22 78mm
High Comp 14.4:1
Comp. 13.9:1
250 SX-F
56-W954.A.WO
Hi-Comp. 14.5:1
56-W955.A.WO.HC
Comp. 14.4:1
250 SX-F
56-W265.A.WO
Hi-Comp. 14.6:1 Comp. 14.40 Comp. 12.9:1 Hi-Comp 14.4:1 Comp. 13.9:1 Hi-Comp. 14.5:1
56-W265.A.WO.HC 56-W4077.A.WO 56-W4730+00A.WO 56-W4734+00A.WO
2023
250 SX-F
81mm
250 XC-F / W
2007 - 12 76mm 2007 - 12 76mm 2013 - 15 78mm 2013 - 15 78mm 2016 - 22 78mm 2016 - 22 78mm
TPR76.00 TPR76.00
250 XC-F
56-W954.A.WO
56-R323.WO 56-R323.WO 56-R323.WO 56-R323.WO 56-R341.WO
56-W955.A.WO.HC
Comp. 14.4:1
250 XC-F
56-W265.A.WO
Hi-Comp. 14.6:1
56-W265.A.WO.HC 56-W4077.A.WO 56-W960.A.WO 56-W9950.A.WO
Comp. 14.40 Comp. 12.3:1 Comp. 12.5:1
2023
250 XC-F 350 EXC-F 350 EXC-F 350 LC4 350 SX-F
81mm
2012 - 16 88mm 2017 - 19 88mm
56-R271 56-R271 56-R363 56-R271 56-R271
1992 - 94 89mm 56-W013.A
56-0156
Comp 13.5:1
2011 - 15 88mm 2011 - 15 88mm 1976 - 81 81.40mm 2009 - 11 95mm
56-W4735+00A.WO 56-W4736+00A.WO 56-W9938.050.WO 56-W4739.A.WO
56-7956 56-7956 56-7948
56-0153.WO 56-0153.WO 56-0153.WO 56-0154.WO
Hi-Comp. 14.5:1
400
–
400 EXC 400 LC4
56-R554.WO 56-R305.WO
56-7982.WO 56-7921.WO 56-7975.WO 56-7927.WO 56-7927.WO 56-7927.WO 56-7927.WO
1993 - 96 95mm 56-W014.A
56-0156 56-0156
400 LC4 / ESG-E
1997
89mm 56-W013.A
56-R363 56-R363 56-R363 56-R363 56-R363
400 LC4 Comp 11.0:1
1998 - 01 89mm 1998 - 01 89mm
56-W4733+00A.WO 56-W215.00A.WO
56-0155.WO 56-0155.WO 56-0155.WO 56-0155.WO 56-0155.WO 56-0155.WO 56-0154.WO 56-0154.WO 56-0154.WO 56-0154.WO 56-0154.WO 56-0154.WO 56-0154.WO 56-0155.WO 56-0155.WO 56-0154.WO
Hi-Comp. 12.5:1
450 EXC-G Racing Comp. 11.1:1 450 EXC Racing Comp. 11.1:1
2003 - 06 89mm 56-W178.A 2003 - 07 89mm 56-W178.A 2008 - 11 95mm 56-W243.A
450 EXC-R
56-R554.WO 56-R554.WO 56-R329.WO 56-R329.WO 56-R328.WO 56-R329.WO 56-R329.WO 56-R329.WO 56-R329.WO 56-R305.WO 56-R554.WO 56-R328.WO
56-7926 56-7982 56-7982 56-7964 56-7964 56-7926 56-7926 56-7926 56-7926
450 EXC
2012 - 16 95mm 2017 - 21 95mm 2022 - 23 95mm 2007 - 10 97mm
56-W968.A.WO 56-W968.A.WO 56-W8830.A.WO 56-W107.A.WO
450 EXC-F 450 EXC-F 450 XC-F 450 XCR-W
2008 - 09 95mm 56-W243.A
450 XC-W Champion Edition
2010
95mm 56-W243.A
450 XC-W Six Days
2010 - 11 95mm 56-W243.A 2012 - 13 95mm 56-W243.A
450 XC-W
450 SX Racing Comp. 12.0:1
2003 - 06 95mm
56-W4805.A.WO
56-7927.WO 56-7927.WO
Hi-Comp. 13.0:1
2003 - 06 95mm 56-W4806.A
Comp. 12.50
450 SX-F
2007 - 12 97mm
56-W107.A.WO
56-7964
Please note All Piston Kits do not include small end bearings. Most Kits available from standard size up to 2.00mm over size.
Please Note Wossner Piston rings will NOT run in chrome bores!
*Please visit our website for current prices E29b
E-mail: sales@oro2u.com
www.oro2u.com
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