Piston Kits
Wossner
KTM 4-Stroke Models
Years
Size
Piston Kit
Piston Rings 56-R554.WO 56-R554.WO 56-R554.WO 56-R329.WO 56-R329.WO 56-R329.WO 56-R329.WO 56-R329.WO 56-R329.WO 56-R559.WO 56-R559.WO 56-R554.WO 56-R559.WO 56-R554.WO 56-R554.WO 56-R559.WO 56-R554.WO 56-R559.WO 56-R486.WO 56-R559.WO 56-R305.WO 56-R501.WO
Piston Pin 56-7982.WO 56-7982.WO 56-7982.WO
Piston Clips 56-0154.WO 56-0154.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 56-0155.WO 56-0155.WO 56-0155.WO 56-0155.WO 56-0155.WO 56-0154.WO 56-0155.WO
Small End Bearing
Comp. 12.6:1
450 SX-F
2013 - 22 95mm 2013 - 22 95mm 2013 - 22 95mm
56-W956.A.WO
– – – – – – – – – – – – – – – – – – – – – – – – – – – –
Hi-Comp. 13.6:1
56-W956.A.WO.HC 56-W956.A.WO.GP 56-W4985.A.WO 56-W4985.A.WO 56-W925.A.WO 56-W925.A.WO 56-W8816.A.WO 56-W925.A.WO
GP Racer
Comp. 13.50 Comp. 13.50 Comp. 13.50
2023 2023
450 SX-F 450 XC-F 500 EXC 500 EXC-F 500 EXC-F
95mm 95mm
56-7964 56-7964
2012 - 16 95mm 2017 - 19 95mm 2020 - 23 95mm 2020 - 23 95mm
56-7982.WO 56-7982.WO 56-7982.WO 56-7982.WO 56-7927.WO 56-7927.WO 56-7927.WO 56-7927.WO 56-7927.WO 56-7927.WO 56-7927.WO
500 EXC-F Six Days 505 SX-F Comp 12.5:1
2007 - 08 100mm 56-W245.A
High Comp. 13.5:1
2007 - 08 100mm 2000 - 02 95mm 2000 - 02 100mm 2003 - 07 95mm 2003 - 07 95mm 2003 - 07 100mm
56-W315+00A.WO 56-W216+00A.WO 56-W024+00A.WO 56-W4731.A.WO 56-W216+00A.WO 56-W024+00A.WO
520 SX/EXC Hi - Comp 12.5:1
Big Bore
525 SX/EXC Std. Comp 11.0:1
Hi - Comp 12.5:1
Big Bore
530 EXC-R
2008 - 11 95mm 56-W246.A
56-7926
540 SXS Racing
2006
100mm
56-W024+00A.WO 56-W186+0.00.WO
56-7927.WO 56-7975.WO 56-7927.WO 56-7974.WO 56-7974.WO 56-7974.WO 56-7974.WO 56-7974.WO 56-7974.WO 56-7974.WO 56-7974.WO
560 EXC
All Years 94mm
56-0156
560 SMR Comp 12.0:1
2006 - 07 100mm 56-W247.A 1988 - 92 95mm 56-W014.A
56-0155.WO
600 LC4 600 LC4 620 LC4 620 SC 625 SMC 640 Duke 640 LC4 660 SMC
56-0156 56-0156 56-0156 56-0156 56-0156 56-0156 56-0156 56-0156
1993
100mm 56-W017.A
1994 - 97 101mm 56-W181.A 1998 - 01 101mm 56-W181.A 1994 - 09 101mm 56-W181.A 1994 - 09 101mm 56-W181.A 1998 - 07 101mm 56-W181.A
56-R364 56-R364 56-R364 56-R364 56-R364 56-R393
2003 - 09 102mm
56-W4809.WO
MAICO 2-Stroke Models
Years
Size
Piston Kit
Piston Rings
Piston Pin 56-7924.WO 56-7924.WO
Piston Clips
Small End Bearing
MC / GS 250 MC / GS 250 MC / GS 400 MC / MD 440 MC / GS 490
1973 - 80 67mm 1986 - 02 67.5mm 1974 - 81 77mm 1973 - 80 82mm
56-W140+0.00 56-W141+0.50 56-W142+0.00 56-W143+0.00 56-W144+0.00
56-R375 56-R376
56-0153.WO 56-881.WO 56-0153.WO 56-881.WO
56-R388.WO 56-R318.WO
56-785 56-785 56-7948
56-0153.WO 56-0153.WO
– –
1980
86.5mm
56-R379
56-0153.WO 56-881.WO
ROTAX Rotax Engines
Years
Size
Piston Kit
Piston Rings
Piston Pin
Piston Clips 56-0153.WO 56-0153.WO 56-0153.WO
Small End Bearing
SWM 125 (MX-2, MX-6 1980)
1978 - 82 55mm 1977 - 82 62mm 1979 - 82 74mm
56-W9937.100.WO 56-W969+00A.WO 56-W970+00A.WO
56-R366 56-R572 56-R265
–
– – –
SWM 175 SWM 250
56-784
56-7924.WO
RIEJU 2-Stroke Models
Years
Size
Piston Kit
Piston Rings
Piston Pin
Piston Clips
Small End Bearing
MR Racing 200 MR Ranger 200
2021 - 22 62.5mm 56-W168.A 2021 - 22 62.5mm 56-W168.A
56-R373 56-R373
56-784 56-784 56-784 56-784
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 56-801.WO 56-0153.WO 56-801.WO 56-0153.WO 56-801.WO 56-0153.WO 56-801.WO
MR Pro 250
2021 - 22 66.4mm 2021 - 22 66.4mm
56-W157.A.WO 56-W157.A.WO
56-R420.1.WO x2 56-R420.1.WO x2
MR Racing 250
56-7924.WO 56-7924.WO 56-7924.WO 56-7924.WO
MR Pro 300
2021 - 22 72mm 56-W159.A 2021 - 22 72mm 56-W159.A 2021 - 22 72mm 56-W159.A
56-R372 x2 56-R372 x2 56-R372 x2 56-R372 x2
MR Racing 300 MR Ranger 300 Six Days 300
2022
72mm 56-W159.A
Please Note Wossner Piston rings will NOT run in chrome bores!
Please note All Piston Kits do not include small end bearings. Most Kits available from standard size up to 2.00mm over size.
*Please visit our website for current prices E30
www.oro2u.com
Tel: 01597 822 666
Fax: 01597 825 224
Made with FlippingBook - Online magazine maker