Wiseco
Piston Kits
YAMAHA 2-Stroke Models
Years
Piston Type
Size
Piston Kit
Piston Rings 56-R420.2.WI 56-R406.WI 56-R420.2.WI
Piston Pin
Piston Clips 56-0153.WI 56-0153.WI 56-0153.WI 56-0153.WI 56-0153.WI 56-0153.WI 56-0153.WI 56-0153.WI 56-0153.WI
Small End Bearing
YZ 250 Dual Ring
1999 - 01 Pro-Lite 1999 - 01 ArmorGlide 2002 - 22 Pro-Lite 2002 - 22 ArmorGlide 2002 - 20 ArmorGlide
66.4mm 56-W742.WI
56-781 56-781 56-781 56-781 56-781 56-7916 56-7916 56-7916 56-7916
56-801.WI 56-801.WI 56-801.WI 56-801.WI 56-801.WI 56-809.WI 56-809.WI 56-809.WI 56-809.WI
Big Bore
72mm 56-W844_560.WI
YZ 250 Dual Ring
66.4mm 56-W742.WI
Single Ring
66.4mm
56-W742.WI.RC
56-R441
Big Bore
72mm 56-W844_560.WI
56-R406.WI
IT 490 YZ 490 YZ 490 WR 500
1983 - 84 1982 - 83
87mm 87mm 87mm 87mm
56-W478+0.00.WI 56-W478+0.00.WI
56-R200 56-R200 56-R200 56-R200
1984 - 90 Pro-Lite 1992 - 93 Pro-Lite
56-W546+000 56-W546+000
4-Stroke Models
Piston Type
Size
Piston Kit
Piston Rings
Piston Pin 56-7977.WI 56-7966.WI 56-7966.WI 56-7966.WI 56-7931.WI 56-7931.WI 56-7931.WI 56-7931.WI 56-7931.WI 56-7931.WI 56-7966.WI 56-7966.WI 56-7966.WI 56-7966.WI 56-7966.WI 56-7966.WI 56-7966.WI 56-7931.WI 56-7931.WI 56-7931.WI 56-7931.WI 56-7931.WI 56-7931.WI 56-7931.WI 56-7931.WI 56-7931.WI 56-7931.WI 56-7931.WI 56-7931.WI
Piston Clips
Small End Bearing
Years
XT 250 Hi-Comp. 10.5:1 WR 250F Comp. 13.2:1 WR 250F Comp. 12.5:1
2013 - 20 ArmorGlide
74mm 56-W4951.WI
56-R530
56-007
– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
2001 - 04 2005 - 13
77mm
56-W4738+00A_WI
56-R301.WI.YZF 56-R301.WI.YZF
56-0152.WI 56-0152.WI 56-0152.WI 56-0152.WI 56-0152.WI 56-0162.WI 56-0152.WI 56-0152.WI 56-0152.WI 56-0152.WI 56-0152.WI 56-0152.WI 56-0152.WI 56-0152.WI 56-0162.WI 56-0162.WI 56-0152.WI 56-0152.WI 56-0162.WI 56-0152.WI 56-0152.WI 56-0152.WI 56-0152.WI 56-0152.WI 56-0162.WI 56-0152.WI 56-0152.WI 56-0152.WI 56-0153.WI 56-0153.WI
77mm 56-W188.WI
Hi-Comp. 13.5:1
2005 - 13 ArmorGlide
77mm
56-W188.WI.HC
56-R316.WI 56-R316.WI 56-R316.WI 56-R316.WI 56-R316.WI 56-R316.WI 56-R316.WI
WR 250F Comp. 13.5:1
2015 - 17
77mm 56-W4961.WI
Hi-Comp. 14:1
2015 - 17 ArmorGlide
77mm
56-W4961.WI.HC
WR 250F Comp. 13.5:1
2018 - 19 2018 - 19 2018 - 19
77mm 56-W6722.WI
Comp. 14:1
77mm 77mm
56-W6722.WI.HC 56-W6722.WI.HC5
Hi-Comp. 14.5:1
WR 250F Comp. 13.8:1 YZ 250F Comp. 12.7:1 YZ 250F Comp. 12.5:1
2020 - 22 ArmorGlide
77mm 56-W8812.WI
2001 - 04 2005 - 07
77mm
56-W4738+00A_WI
56-R301.WI.YZF 56-R301.WI.YZF
77mm 56-W188.WI
Hi-Comp. 13.5:1
2005 - 07 ArmorGlide
77mm
56-W188.WI.HC
56-R316.WI
YZ 250F Comp. 13.5:1
ArmorGlide ArmorGlide
2008 - 11 2008 - 11
77mm 56-W4952.WI
56-R301.WI.YZF
Hi-Comp. 14:1
77mm
56-W4952.WI.HC
56-R316.WI
YZ 250F Comp. 13.5:1
2012 - 13 ArmorGlide 2012 - 13 ArmorGlide
77mm 56-W108.000.WI
56-R301.WI.YZF 56-R301.WI.YZF
Hi-Comp. 14:1
77mm
56-W109+000.WI
YZ 250F Comp. 13.5:1
2014 - 15
77mm 56-W4961.WI
56-R316.WI 56-R316.WI 56-R316.WI 56-R316.WI 56-R316.WI 56-R316.WI 56-R316.WI 56-R316.WI 56-R316.WI 56-R316.WI 56-R316.WI 56-R316.WI 56-R304.WI 56-R304.WI 56-R305.WI 56-R305.WI 56-R305.WI 56-R305.WI 56-R535.WI 56-R535.WI 56-R305.WI 56-R305.WI 56-R320.WI 56-R320.WI 56-R535.WI 56-R535.WI 56-R320.WI 56-R320.WI 56-R535.WI 56-R535.WI 56-R320.WI 56-R320.WI
Hi-Comp. 14:1
2014 - 15 ArmorGlide
77mm
56-W4961.WI.HC
YZ 250F Comp. 13.5:1
2016 - 18 2016 - 18 2016 - 18
77mm 56-W6722.WI
Comp. 14:1
77mm 77mm
56-W6722.WI.HC 56-W6722.WI.HC5
Hi-Comp. 14.5:1
YZ 250F Comp. 13.8:1 YZ 250FX Comp. 13.5:1
2019 - 22 ArmorGlide
77mm 56-W8812.WI 77mm 56-W4961.WI
2015 - 16
Hi-Comp. 14:1
2015 - 16 ArmorGlide
77mm
56-W4961.WI.HC
YZ 250FX Comp. 13.5:1
2017 - 19 2017 - 19 2017 - 19
77mm 56-W6722.WI
Comp. 14:1
77mm 77mm
56-W6722.WI.HC 56-W6722.WI.HC5
Hi-Comp. 14.5:1
YZ 250FX Comp. 13.8:1 WR 400F Comp. 12.5:1 YZ 400F Comp. 12.5:1 WR 426F Comp. 12.5:1 YZ 426F Comp. 12.5:1 WR 450F Comp. 12.5:1
2020 - 22 ArmorGlide
77mm 56-W8812.WI 92mm 56-W4649.WI 92mm 56-W4649.WI
1998 - 00 1998 - 99 2001 - 02 2000 - 02
56-7929.WI.46 56-7929.WI.46
95mm 95mm
56-W4693+00A.WI 56-W4693+00A.WI
– –
56-009 56-009
2003 - 15 ArmorGlide 2003 - 15 ArmorGlide 2016 - 18 ArmorGlide 2016 - 18 ArmorGlide 2019 - 20 ArmorGlide 2021 - 22 ArmorGlide 2003 - 09 ArmorGlide 2003 - 09 ArmorGlide 2010 - 13 ArmorGlide 2010 - 13 ArmorGlide 2014 - 17 ArmorGlide 2014 - 17 ArmorGlide 2018 - 19 ArmorGlide 2018 - 19 ArmorGlide 2020 - 22 ArmorGlide 2016 - 18 ArmorGlide 2016 - 18 ArmorGlide 2019 - 20 ArmorGlide
95mm 56-W4785.WI
56-7929.WI 56-7929.WI
56-0153.WI 56-0153.WI
Hi-Comp. 13:1
95mm 97mm 97mm 97mm 97mm
56-W4785.WI.HC 56-W4963.WI.AR 56-W4963.WI.ARH 56-W4965.WI.AR 56-W4787.WI.AR
WR 450F Comp. 12.5:1
708-2050-16-93C 56-0153.WI 708-2050-16-93C 56-0153.WI
Hi-Comp. 13.5:1
WR 450F WR 450F
YZ 450F Comp. 12.5:1
95mm 56-W4785.WI
56-7929.WI 56-7929.WI
56-0153.WI 56-0153.WI
Hi-Comp. 13:1
95mm
56-W4785.WI.HC
YZ 450F Comp. 12.5:1
97mm 56-W261.WI
708-2050-16-93C 56-0153.WI 708-2050-16-93C 56-0153.WI 708-2050-16-93C 56-0153.WI 708-2050-16-93C 56-0153.WI 708-2050-16-93C 56-0153.WI 708-2050-16-93C 56-0153.WI 708-2050-16-93C 56-0153.WI 708-2050-16-93C 56-0153.WI 708-2050-16-93C 56-0153.WI 708-2050-16-93C 56-0153.WI
Hi-Comp. 13:1
97mm 97mm 97mm 97mm 97mm 97mm 97mm 97mm 97mm 97mm 97mm 95mm
56-W261.WI.HC 56-W4963.WI.AR 56-W4963.WI.ARH 56-W4965.WI.AR 56-W4965.WI.HC 56-W4787.WI.AR 56-W4963.WI.AR 56-W4963.WI.ARH 56-W4965.WI.AR 56-W4965.WI.HC 56-W4787.WI.AR 56-W4797+00A_WI
YZ 450F Comp. 12.5:1
Hi-Comp. 13.5:1
YZ 450F Comp. 12.8:1
Hi-Comp. 13.5:1
YZ 450F Comp. 13.0:1 YZ 450FX Comp. 12.5:1
Hi-Comp. 13.5:1
YZ 450FX Comp. 12.8:1
Hi-Comp. 13.5:1
ArmorGlide
2019
2021 - 22 ArmorGlide
YZ 450FX
TT/XT 600 Stock Comp.
1984 - 04 1984 - 04
56-R507.WI 56-R507.WI
56-7921.WI 56-7921.WI
56-012 56-012
Hi-Comp. 11.5:1
95mm 56-W4596.000.WI
** Crankcase clearance required for 50mm and larger bores. ## Piston has no intake window
*Please visit our website for current prices E19
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