Piston Kits
Wiseco
Wiseco 2-Stroke Piston Kits
Wiseco 4-Stroke Piston Kits
Ideal for Multi Purpose Riding Forged Series • Great Value for all around riding types • Every Day Ride/Race Power You can Feel! • Forged for Optimized Strength and Life • ArmorGlide® Skirt Coating Reduces Friction and Noise for More Horsepower on most applications • Wide Range of Bore and Compression Ratio Options
Endurance / High RPM GP Series™ • Optimized Race Features for Top End Power • Electra-Coated Dome, Ring Groove & Pin Bore for Extended Life • ArmorGlide® Skirt Coating Reduces Friction and Noise for More Horsepower Potential • Upgrade Ti Nitride Ring Package for Lower Coefficient of Friction and Wear
YAMAHA 2-Stroke Models
Years
Piston Type
Size
Piston Kit
Piston Rings
Piston Pin
Piston Clips
Small End Bearing
PW 50 YZ 65 BW 80 PW 80 YZ 80 YZ 80 YZ 80 YZ 80 YZ 80
1985 - 20 2018 - 21 1986 - 90 1991 - 06 1976 - 80 1982 - 83
40mm
56-W938+000.WI
–
–
56-011
– –
43.5mm 56-W9991.WI
56-R063
56-7914 56-7903 56-7903 56-7903 56-7903 56-7903 56-7903 56-7903 56-708 56-708
56-005.WI 56-005.WI 56-005.WI 56-005.WI 56-005.WI 56-005.WI 56-005.WI 56-005.WI
47mm 47mm 49mm 47mm 48mm 48mm 48mm 46mm 47mm
56-W939+000.WI 56-W939+000.WI 56-W457+000_WI 56-W477+000_WI 56-W508+000_WI 56-W520+000_WI 56-W569+000_WI 56-W671+0.00.WI 56-W646+00A_WI
56-R905.WI 56-R905.WI 56-R527.WI.2 56-R905.WI 56-R527.WI.1 56-R452.WI 56-R452.WI
56-827.WI 56-827.WI 56-827.WI 56-7992.WI 56-811.WI 56-811.WI 56-811.WI 56-821.WI 56-821.WI 56-821.WI 56-821.WI 56-821.WI 56-821.WI 56-815.WI 56-815.WI 56-815.WI 56-815.WI 56-815.WI 56-815.WI 56-836.WI 56-836.WI 56-836.WI 56-836.WI 56-814.WI 56-836.WI 56-836.WI 56-814.WI 56-814.WI 56-814.WI 56-7994.WI 56-7994.WI 56-7994.WI 56-832.WI 56-801.WI 56-809.WI 56-809.WI 56-809.WI 56-801.WI 56-809.WI 56-809.WI 56-809.WI
1984
1985 - 87 1988 - 92
YZ 80 (International Bore)
1993 - 01 Pro-Lite 1993 - 01 Pro-Lite 1993 - 01 ArmorGlide 2002 - 21 Pro-Lite 2002 - 20 ArmorGlide
56-R401 56-R002 56-R202 56-R525 56-R202 56-R512
56-003 56-003 56-003 56-003 56-003 56-003
US Bore Big Bore
52.5mm 56-W805_550.WI ** 47.5mm 56-W805_000.WI 52.5mm 56-W805_550.WI ** 52mm 56-W771.5200
56-715.WI
YZ 85
56-708
YZ 85 Big Bore
56-715.WI 56-715.WI
RT 100 YZ 125 YZ 125 YZ 125 YZ 125 YZ 125 YZ 125 YZ 125
1990 - 00 1976 - 82
56mm 56mm 56mm 56mm 56mm 54mm
56-W435+00A_WI 56-W512+000_WI 56-W559+000_WI 56-W582+00A_WI 56-W629+00A_WI 56-W647+00A_WI
56-R405+P8.1
– – – – – –
56-0152.WI 56-0152.WI 56-0152.WI 56-0152.WI 56-0152.WI 56-0152.WI
1984
–
1986 - 88 Pro-Lite
56-R405+P8.1 56-R405+P8.1 56-R405+P8.1
Pro-Lite Pro-Lite
1989 1993
1994 - 96 Pro-Lite
56-R405+P0.1.WI 56-R405+P0.1.WI 56-R405+P0.1.WI 56-R405+P0.1.WI
Pro-Lite
1997
54mm 56-W693.A_WI
56-729.WI 56-722.WI 56-722.WI 56-729.WI 56-729.WI 56-722.WI 56-722.WI 56-729.WI
56-002 56-002 56-002 56-002 56-002 56-002 56-002 56-002 56-002 56-002
1997 - 00 GP /ArmorGlide 54mm 1997 - 00 GP /ArmorGlide 54mm
56-W797.WI_GP ## 56-W676.P0.WI.G ##
Flat Top Conversion
1998 - 00 Pro-Lite
YZ 125 YZ 125
54mm 56-W726_000_WI 54mm 56-W726_000_WI
–
Pro-Lite
2001
2001 - 04 GP /ArmorGlide 54mm 2001 - 04 GP /ArmorGlide 54mm
56-R405+P0.1.WI 56-R405+P0.1.WI
56-W797.WI_GP ## 56-W676.P0.WI.G ##
Flat Top Conversion
2002 - 04 Pro-Lite 2005 - 21 Pro-Lite
YZ 125 YZ 125
54mm 56-W797.WI.PL 54mm 56-W845.WI
56-R405+P0.1.WI 56-R405+P0.1.WI
56-722.WI.S668 56-722.WI.S668
2005 - 20 GP /ArmorGlide 54mm
56-W845.WI.GP
IT 175 YZ 175 RT 180 IT 200 IT 250 IT 250 WR 250 WR 250 YZ 250 YZ 250 YZ 250 YZ 250
1976 - 81 1976 - 81 1990 - 98 1984 - 86 1981 - 82
66mm 56-W374.000_WI 66mm 56-W374.000_WI
56-R489 56-R489
56-7942.WI 56-7942.WI
56-0152.WI 56-0152.WI 56-0152.WI 56-0152.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
64.5mm 56-W772.WI
56-R920.WI
56-787
66mm 70mm 68mm 68mm
56-W195+000.WI 56-W452+000.WI 56-W196+00A.WI 56-W605+000_WI
56-R489
56-7942.WI
56-R487.WI 56-R500.WI 56-R500.WI 56-R500.WI 56-R487.WI 56-R500.WI 56-R500.WI 56-R500.WI
56-724
Pro-Lite Pro-Lite
1983 1991
56-7905.WI
56-781 56-781 56-724
1992 - 98 Pro-Lite
68mm 56-W677.WI
1980 - 82
70mm 70mm 68mm
56-W452+000.WI 56-W560+000_WI 56-W605+000_WI
1983 - 87 Pro-Lite 1988 - 91 Pro-Lite 1992 - 98 Pro-Lite
56-7905.WI
56-781 56-781
68mm 56-W677.WI
Please note All Piston Kits do not include small end bearings. Most Kits available from standard size up to 2.00mm over size.
** Crankcase clearance required for 50mm and larger bores. ## Piston has no intake window
*Please visit our website for current prices E18
www.oro2u.com
Tel: 01597 822 666
Fax: 01597 825 224
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