ORO2U Dirt Catalogue - Section E - Engine and Performance.

Wiseco

Piston Kits

YAMAHA 2-Stroke Models

Years

Piston Type

Size

Piston Kit

Piston Rings

Piston Pin

Piston Clips

Small End Bearing

YZ 250 Dual Ring

2002 - 25 Pro-Lite 2002 - 25 ArmorGlide 2002 - 25 ArmorGlide 2016 - 25 Pro-Lite

66.4mm 66.4mm

.WI

.2.WI

.WI .WI .WI .WI .WI .WI .WI .WI

56-W742 56-W742 56-W844 56-W742 56-W478 56-W478 56-W546 56-W546

56-R420 56-R441 56-R406 56-R420

56-781 56-781 56-781 56-781 56-7916 56-7916 56-7916 56-7916

56-0153 56-0153 56-0153 56-0153 56-0153 56-0153 56-0153 56-0153

56-801 56-801 56-801 56-801 56-809 56-809 56-809 56-809

Single Ring

.WI.RC _560.WI

Big Bore

72mm

.WI

YZ 250X Dual Ring

66.4mm

.WI

.2.WI

IT 490 YZ 490 YZ 490 WR 500

1983 - 84 1982 - 83

87mm 87mm 87mm 87mm

+0.00.WI +0.00.WI

56-R200 56-R200 56-R200 56-R200

1984 - 90 Pro-Lite 1992 - 93 Pro-Lite

+000 +000

4-Stroke Models

Piston Type

Size

Piston Kit 56-W4951 56-W4738

Piston Rings

Piston Pin

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 77mm 77mm 77mm 77mm 77mm 77mm 77mm 77mm 77mm 77mm 77mm 77mm 77mm 77mm 77mm 77mm 77mm 77mm 77mm 77mm 77mm 77mm 77mm 77mm 77mm 77mm 77mm 77mm 92mm 92mm 95mm 95mm 95mm 95mm 97mm 97mm 97mm 97mm 97mm 95mm 95mm 97mm 97mm 97mm 97mm 97mm 97mm 97mm 97mm 97mm 97mm 97mm 97mm 97mm 95mm 95mm

.WI

.WI .WI .WI .WI

– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –

56-R530 56-R301 56-R301 56-R316 56-R316

56-7977 56-7966 56-7966 56-7966

56-007

2001 - 04 2005 - 13

+00A_WI

.WI.YZF .WI.YZF

.WI .WI .WI .WI

56-0152 56-0152 56-0152 56-0152

.WI

56-W188 56-W188

Hi-Comp. 13.5:1

2005 - 13 ArmorGlide

.WI.HC

.WI .WI

WR 250F Comp. 13.5:1

2015 - 17

.WI

.WI .WI .WI .WI

56-W4961 56-W4961 56-W6722 56-W6722 56-W6722 56-W8812 56-W4738

56-7931 56-7931 56-7931 56-7931

Hi-Comp. 14:1

2015 - 17 ArmorGlide

.WI.HC

.WI .WI .WI .WI .WI

.WI .WI .WI .WI .WI .WI .WI .WI

56-R316 56-R316 56-R316 56-R316

56-0152 56-0162 56-0152 56-0152 56-0152 56-0152 56-0152 56-0152

WR 250F Comp. 13.5:1

2018 - 19 2018 - 19 2018 - 19

.WI

Comp. 14:1

.WI.HC .WI.HC5

Hi-Comp. 14.5:1

.WI .WI .WI .WI

56-7931 56-7931 56-7966 56-7966

WR 250F Comp. 13.8:1 YZ 250F Comp. 12.7:1 YZ 250F Comp. 12.5:1

2020 - 25 ArmorGlide

.WI

56-R316 56-R301 56-R301 56-R316

2001 - 04 2005 - 07

+00A_WI

.WI.YZF .WI.YZF

.WI

56-W188 56-W188

Hi-Comp. 13.5:1

2005 - 07 ArmorGlide

.WI.HC

.WI

.WI .WI

56-7966 56-7966

YZ 250F Comp. 13.5:1

ArmorGlide ArmorGlide

2008 - 11 2008 - 11

.WI

.WI.YZF

.WI .WI

56-W4952 56-W4952

56-R301 56-R316

56-0152 56-0152

Hi-Comp. 14:1

.WI.HC .000.WI +000.WI

.WI

.WI .WI .WI .WI

56-7966 56-7966 56-7966 56-7931

YZ 250F Comp. 13.5:1

2012 - 13 ArmorGlide 2012 - 13 ArmorGlide

.WI.YZF .WI.YZF

.WI .WI .WI .WI

56-W108 56-W109

56-R301 56-R301

56-0162 56-0162 56-0152 56-0152

Hi-Comp. 14:1

YZ 250F Comp. 13.5:1

2014 - 15

.WI

.WI .WI .WI .WI

56-W4961 56-W4961 56-W6722 56-W6722 56-W6722 56-W8812 56-W4961 56-W4961 56-W6722 56-W6722 56-W6722 56-W8812 56-W4649 56-W4649 56-W4693 56-W4693 56-W4785 56-W4785 56-W4963 56-W4963 56-W4965 56-W4787 56-W4986 56-W4785 56-W4785

56-R316 56-R316 56-R316 56-R316

Hi-Comp. 14:1

2014 - 15 ArmorGlide

.WI.HC

.WI .WI .WI .WI .WI .WI .WI .WI

56-7931 56-7931 56-7931 56-7931 56-7931 56-7931 56-7931 56-7931

YZ 250F Comp. 13.5:1

2016 - 18 2016 - 18 2016 - 18

.WI

.WI .WI .WI .WI .WI .WI .WI .WI

56-0162 56-0152 56-0152 56-0152 56-0152 56-0152 56-0162 56-0152

Comp. 14:1

.WI.HC .WI.HC5

Hi-Comp. 14.5:1

.WI .WI

56-R316 56-R316

YZ 250F Comp. 13.8:1 YZ 250FX Comp. 13.5:1

2019 - 25 ArmorGlide

.WI .WI

2015 - 16

.WI .WI .WI .WI

56-R316 56-R316 56-R316 56-R316

Hi-Comp. 14:1

2015 - 16 ArmorGlide

.WI.HC

YZ 250FX Comp. 13.5:1

2017 - 19 2017 - 19 2017 - 19

.WI

Comp. 14:1

.WI.HC .WI.HC5

.WI .WI .WI

56-7931 56-7931 56-7931 56-7929 56-7929

Hi-Comp. 14.5:1

.WI .WI .WI .WI .WI .WI

.WI .WI .WI .WI

56-R316 56-R316 56-R304 56-R304 56-R305 56-R305

56-0152 56-0152 56-0153 56-0153

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 - 25 ArmorGlide

.WI .WI .WI

1998 - 00 1998 - 99 2001 - 02 2000 - 02

.WI.46 .WI.46

+00A.WI +00A.WI

– –

56-009 56-009 56-0153 56-0153

2003 - 15 ArmorGlide 2003 - 15 ArmorGlide 2016 - 18 ArmorGlide 2016 - 18 ArmorGlide 2019 - 20 ArmorGlide 2021 - 23 ArmorGlide 2024 - 25 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 2023 - 25 ArmorGlide 2016 - 18 ArmorGlide 2016 - 18 ArmorGlide 2019 - 20 ArmorGlide

.WI

.WI .WI

56-R305 56-R305

56-7929 56-7929

Hi-Comp. 13:1

.WI.HC .WI.AR

WR 450F Comp. 12.5:1

.WI .WI

708-2050-16-93C 708-2050-16-93C

.WI .WI

56-R535 56-R535

56-0153 56-0153

Hi-Comp. 13.5:1

.WI.ARH

WR 450F WR 450F WR 450F

.WI.AR .WI.AR

.A.WI

YZ 450F Comp. 12.5:1

.WI

.WI .WI

56-R305 56-R305

56-7929 56-7929

56-0153 56-0153

Hi-Comp. 13:1

.WI.HC

YZ 450F Comp. 12.5:1

.WI

.WI .WI

708-2050-16-93C 708-2050-16-93C 708-2050-16-93C 708-2050-16-93C 708-2050-16-93C 708-2050-16-93C

.WI .WI

56-W261 56-W261

56-R320 56-R320

56-0153 56-0153

Hi-Comp. 13:1

.WI.HC

YZ 450F Comp. 12.5:1

.WI.AR

.WI .WI

56-W4963 56-W4963 56-W4965 56-W4965 56-W4787 56-W4986 56-W4963 56-W4963 56-W4965 56-W4965 56-W4787 56-W4797 56-W4596

56-R535 56-R535

56-0153 56-0153

Hi-Comp. 13.5:1

.WI.ARH

YZ 450F Comp. 12.8:1

.WI.AR .WI.HC .WI.AR

.WI .WI

56-R320 56-R320

56-0153 56-0153

Hi-Comp. 13.5:1

YZ 450F Comp. 13.0:1 YZ 450F Comp. 13.0:1 YZ 450FX Comp. 12.5:1

.A.WI

.WI.AR

.WI .WI

708-2050-16-93C 708-2050-16-93C 708-2050-16-93C 708-2050-16-93C

.WI .WI

56-R535 56-R535

56-0153 56-0153

Hi-Comp. 13.5:1

.WI.ARH

YZ 450FX Comp. 12.8:1

.WI.AR .WI.HC .WI.AR

.WI .WI

56-R320 56-R320

56-0153 56-0153

Hi-Comp. 13.5:1

ArmorGlide

2019

2021 - 23 ArmorGlide

YZ 450FX

TT/XT 600 Stock Comp.

1984 - 04 1984 - 04

+00A_WI .000.WI

.WI .WI

56-R507 56-R507

56-7921 56-7921

56-012 56-012

Hi-Comp. 11.5:1

** Crankcase clearance required for 50mm and larger bores. ## Piston has no intake window

*Please visit our website for current prices E25

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