ProX
Piston Kits
TM
2-Stroke Models
Years
Size
Piston Kit
Piston Rings
Piston Pin 56-783.PX
Piston Clips 56-0174.PX
Small End Bearing
MX/EN 125 MX/EN 144 MX/EN 250 MX/EN 300
1992 - 13 54mm
56-W016.C.PROX
–
56-814.PROX 56-814.PROX 56-6373.PROX 56-6373.PROX
2008 - 14 56mm 56-W9840.B.PX 1999 - 16 66.4mm 56-W020.C.PX 2002 - 16 72mm 56-W032.C.PX
56-R1262.PX
– – –
– – –
– –
YAMAHA
2-Stroke Models
Years
Size
Piston Kit
Piston Rings 56-R1263.PX 56-R1280.PX 56-R1264.PX
Piston Pin 56-7979.PR
Piston Clips 56-0165.PX
Small End Bearing
PW 50 YZ 65 YZ 85 YZ 125 YZ 125 YZ 125 YZ 125 YZ 125 YZ 125 YZ 125 YZ 125
1981 - 23 40mm
56-W938+000.PX
56-7996.PROX 56-822.PROX 56-821.PROX 56-815.PROX 56-815.PROX 56-815.PROX 56-836.PROX 56-814.PROX 56-814.PROX 56-814.PROX 56-814.PROX 56-814.PROX 56-814.PROX
2018 - 23 43.5mm 56-W9991.A.PX 2002 - 23 47.5mm 56-W805.A.PX
–
–
56-7930.PR 56-721.DR 56-721.DR 56-726.PR 56-0714.PR 56-0714.PR 56-0714.PR 56-0715.PR 56-0715.PR 56-0715.PR
56-0170.PX 56-0176.PX 56-0176.PX 56-0176.PX 56-0174.PX 56-0174.PX 56-0174.PX 56-0174.PX 56-0174.PX 56-0174.PX 56-0174.PX
56-W503+000_PX *** 56-W629+00B.PX 56-W647+00A.PX
1983
56mm
– – –
1990 - 93 56mm 1994 - 96 54mm
1997 - 00 54mm 56-W726.A.PX
56-R1265.PX 56-R1265.PX 56-R1250.PX 56-R1266.PX 56-R1266.PX 56-R1266.PX 56-R1266.PX
2001
54mm 56-W726.A.PX
2002 - 04 54mm 56-W797.A.PX 2005 - 21 54mm 56-W845.A.PX 2022 - 23 54mm 56-W899.A.PX 2020 - 22 54mm 56-W845.A.PX
YZ 125X YZ 125X
2023
54mm 56-W899.A.PX
1982 - 83 68mm 56-W9859.200.PX ** 1988 - 98 68mm 56-W677.B.PX 1999 - 23 66.4mm 56-W742.A.PX 2016 - 23 66.4mm 56-W742.A.PX 1988 - 97 68mm 56-W677.B.PX
IT 175 YZ 250 YZ 250
– –
– –
–
–
56-0181.PX 56-0181.PX 56-0181.PX 56-0181.PX Piston Clips 56-0176.PX 56-0176.PX 56-0176.PX 56-0176.PX 56-0176.PX 56-0176.PX 56-0176.PX 56-0176.PX 56-0176.PX 56-0176.PX 56-0176.PX 56-0176.PX 56-0176.PX 56-0181.PX 56-0181.PX 56-0185.PX 56-0185.PX 56-0182.PX 56-0182.PX 56-0181.PX 56-0181.PX 56-0181.PX 56-0181.PX 56-0181.PX 56-0181.PX 56-0181.PX 56-0182.PX 56-0182.PX 56-0181.PX 56-0181.PX 56-0181.PX
56-8090.PROX
56-R1259.PX 56-R1259.PX
56-0729.PR 56-0729.PR
56-8010.PX 56-8010.PX
YZ 250X WR 250
–
–
56-8090.PROX
4-Stroke Models
Years
Size
Piston Kit
Piston Rings 56-R1208.PX 56-R1208.PX 56-R1208.PX 56-R1245.PX 56-R1245.PX 56-R1245.PX 56-R1245.PX 56-R1245.PX 56-R1245.PX 56-R1208.PX 56-R1245.PX 56-R1245.PX 56-R1245.PX
Piston Pin 56-0718.PR 56-0718.PR 56-7966.PR 56-6500.PR 56-6500.PR 56-6500.PR 56-6500.PR 56-6500.PR 56-6500.PR 56-0718.PR 56-6500.PR 56-6500.PR 56-6500.PR
Small End Bearing
YZ 250F (Std. Comp. 12.5:1) YZ 250F (Std. Comp. 13.5:1) YZ 250F (Std. Comp. 13.5:1) YZ 250F (Std. Comp. 13.5:1) YZ 250F (Std. Comp. 13.5:1) YZ 250F (Std. Comp. 13.8:1) YZ 250FX (Std. Comp. 13.5:1) YZ 250FX (Std. Comp. 13.5:1) YZ 250FX (Std. Comp. 13.8:1) WR 250F (Std. Comp. 12.5:1) WR 250F (Std. Comp. 13.5:1) WR 250F (Std. Comp. 13.5:1) WR 250F (Std. Comp. 13.8:1) YZ 400F (Std. Comp. 12.5:1) WR 400F (Std. Comp. 12.5:1) YZ 426 F (Std. Comp. 12.5:1) WR 426 F (Std. Comp. 12.5:1) YZ 450 F (Std. Comp. 12.5:1)
2001 - 07 77mm 56-W188.A.PX 2008 - 11 77mm 56-W4952.A.PX 2012 - 13 77mm 56-W108.00A.PX 2014 - 15 77mm 56-W4961.A.PX 2016 - 18 77mm 56-W4966.A.PX 2019 - 23 77mm 56-W8812.A.PX 2015 - 16 77mm 56-W4961.A.PX 2017 - 19 77mm 56-W4966.A.PX 2020 - 23 77mm 56-W8812.A.PX 2001 - 13 77mm 56-W188.A.PX 2015 - 17 77mm 56-W4961.A.PX 2018 - 19 77mm 56-W4966.A.PX 2020 - 23 77mm 56-W8812.A.PX 1998 - 99 92mm 56-W4649.B.PX 1998 - 00 92mm 56-W4649.B.PX
– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
– –
– –
2000 - 02 95mm 2001 - 02 95mm
56-W4693+00B.P 56-W4693+00B.P
56-R1209.PX 56-R1209.PX 56-R1209.PX 56-R1209.PX 56-R1267.PX 56-R1255.PX 56-R1267.PX 56-R1267.PX 56-R1255.PX 56-R1267.PX 56-R1267.PX 56-R1209.PX 56-R1209.PX 56-R1255.PX 56-R1267.PX 56-R1267.PX
56-0732.PR 56-0732.PR 56-0726.PR 56-0726.PR 56-0725.PR 56-0725.PR
2003 - 09 95mm 56-W222.A.PX 2003 - 09 95mm 56-W223.B.PX 2010 - 13 97mm 56-W261.B.PX 2014 - 17 97mm 56-W4963.B.PX 2018 - 19 97mm 56-W4965.A.PX 2020 - 22 97mm 56-W4787.A.PX
(High Comp. 13.0:1)
YZ 450 F (Std. Comp. 12.5:1) YZ 450 F (Std. Comp. 12.5:1) YZ 450 F (Std. Comp. 12.8:1) YZ 450 F (Std. Comp. 13.0:1) YZ 450 F (Std. Comp. 13.0:1) YZ 450 FX (Std. Comp. 12.5:1) YZ 450 FX (Std. Comp. 12.8:1) YZ 450 FX (Std. Comp. 13.0:1) WR 450 F (Std. Comp. 12.5:1)
– –
2023
97mm 56-W4986.A.PX
2016 - 18 97mm 56-W4963.B.PX
56-0725.PR
2019 - 20 97mm
56-W4965.A.PROX
– –
2021 - 23 97mm 56-W4787.A.PX 2003 - 15 95mm 56-W222.A.PX 2003 - 15 95mm 56-W223.B.PX 2016 - 18 97mm 56-W4963.B.PX
56-0726.PR 56-0726.PR 56-0725.PR
(High Comp. 13.0:1)
WR 450 F (Std. Comp. 12.5:1) WR 450 F (Std. Comp. 12.8:1) WR 450 F (Std. Comp. 13.0:1) XT 500 (Std. Comp. 9.0:1)
56-W4965.A.PROX
– – –
2019 - 20 97mm
2021 - 23 97mm 56-W4787.A.PX
56-W4045+000.P
– –
–
1976 - 81 87mm
XT/TT 600
1984 - 04 95mm 56-W4596.000.PX
56-0744.PR
56-0191.PX
**Only available in +2mm oversize ***Only available in oversizes
*Please visit our website for current prices
E-mail: sales@oro2u.com
www.oro2u.com
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