ORO2U Dirt Catalogue - Section E - Engine and Performance.

Wossner

Piston Kits

YAMAHA 4-Stroke Models

Years

Size

Piston Kit

Piston Rings

Piston Pin 56-701.WO 56-701.WO

Piston Clips

Small End Bearing

TTR 125

2001 - 18 54mm All Years 60mm 1999 - 04 70mm 2005 - 20 70mm 1996 - 06 73mm

56-W197.A.WO

56-R269

56-0151 56-0151

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

XT 125

56-W063+00A.WO 56-W1030+00A.WO 56-W1030+00A.WO 56-W198+00A.WO 56-W4950.A.WO 56-W4738+00A.WO 56-W022+00A.WO 56-W189+00A.WO 56-W188.A.WO 56-W4961.A.WO 56-W4962.A.WO 56-W4966.A.WO 56-W8812.A.WO 56-W4738+00A.WO 56-W022+00A.WO 56-W189+00A.WO

TT-R 225 TT-R 230 TT-R 250

56-R349 56-R349 56-R277

56-732 56-732

56-0152.WO 56-0152.WO 56-0153.WO 56-0160.WO 56-0152.WO 56-0152.WO 56-0152.WO 56-0152.WO 56-0152.WO 56-0152.WO 56-0152.WO 56-0152.WO 56-0152.WO 56-0152.WO 56-0152.WO 56-0152.WO 56-0152.WO 56-0152.WO 56-0152.WO 56-0152.WO 56-0152.WO 56-0152.WO 56-0152.WO 56-0152.WO 56-0152.WO 56-0160.WO 56-0160.WO

56-7937.WO

XT250 Dual Sport

2013 - 20

56-R211.WO 56-R407.WO 56-R407.WO

56-7972

WR 250F Comp. 12.5:1

2001 - 04 77mm 2001 - 04 77mm 2005 - 13 77mm 2005 - 13 77mm 2015 - 17 77mm 2015 - 17 77mm 2018 - 19 77mm 2020 - 23 77mm 2001 - 04 77mm 2001 - 04 77mm 2005 - 07 77mm 2005 - 07 77mm 2008 - 13 77mm 2008 - 13 77mm 2014 - 15 77mm 2014 - 15 77mm 2016 - 18 77mm 2016 - 18 77mm 2019 - 23 77mm 2017 - 19 77mm 2020 - 23 77mm 2008 - 12 77mm 2008 - 12 77mm 1985 - 88 86mm 1985 - 00 86mm

56-7925.WO.44

Hi-Comp. 13.3:1

56-7981.WO

WR 250F Comp. 12.5:1

56-R407.3.WO 56-7981.WO

Hi-Comp. 13.5:1

56-R407.WO 56-R407.WO 56-R407.WO 56-R327.WO 56-R327.WO 56-R407.WO 56-R407.WO

56-7925.WO.44

WR 250F Comp. 13.7:1

56-7945.WO 56-7945.WO 56-7981.WO 56-7981.WO

Hi-Comp. 14.5:1

WR 250F Comp 13.7:1

WR 250F

YZ 250F Comp. 12.5:1

56-7925.WO.44

Hi-Comp. 13.3:1

56-7981.WO

YZ 250F Comp. 12.5:1

56-R407.3.WO 56-7981.WO

Hi-Comp. 13.5:1

56-W188.A.WO

56-R407.WO 56-R407.WO 56-R407.WO 56-R407.WO 56-R407.WO 56-R327.WO 56-R327.WO 56-R327.WO 56-R327.WO 56-R327.WO 56-R407.WO 56-R407.WO 56-R483.WO 56-R483.WO

56-7925.WO.44

YZ 250F Comp. 13.5:1

56-W240+00A.WO 56-W241+00A.WO 56-W4961.A.WO 56-W4962.A.WO 56-W4966.A.WO 56-W4966.A.WO.HC 56-W8812.A.WO 56-W4966.A.WO 56-W8812.A.WO 56-W238+00A.WO

56-7981.WO 56-7981.WO 56-7945.WO 56-7945.WO 56-7945.WO 56-7981.WO 56-7981.WO 56-7981.WO 56-7981.WO

Hi-Comp. 14.1:1

YZ 250F Std. Comp. 13.7:1

Hi-Comp. 14.5:1

YZ 250F Comp. 13.7:1

Hi-Comp. 14.4:1

YZ 250F Std. Comp. 13.7:1 YZ 250FX Comp 13.7:1

YZ 250FX

WR 250X Comp. 11.8:1

56-7972 56-7972

Hi-Comp. 13.5:1

56-W239.A.WO 56-W4674+00.W 56-W4674+00.W

TT 350 XT 350

56-7934.WO 56-7934.WO

56-0154 56-0154

Please note All Piston Kits do not include small end bearings. Most Kits available from standard size up to 2.00mm over size.

Please Note Wossner Piston rings will NOT run in chrome bores!

Wossner Piston Kits With over 25 years of custom piston and rod manufacturing, Wossner Pistons is deeply committed to bringing to market only the best and most accurately machined forged pistons and rods available. Wossner Pistons commitment to quality stems from designing racing components for top European racing teams in all types of venues to supplying the weekend racer a hop-up high compression piston, or a big bore piston to take advantage of today’s high revving high horsepower engines in both automotive and motorcycle applications.With unsurpassed quality and a commitment, Wossner Pistons will always listen to the customer as this assures you will always receive the high quality forged CNC machined components you would expect from today’s top European piston and rod manufacturer. Wossner Pistons believes in continued research and development so that the end user is guaranteed to receive the highest quality machined forged piston. Wossner Pistons engineers & manufactures 2-stroke and 4-stroke motorcycle, automotive, snowmobile pistons in various bore sizes and compression ratios.

*Please visit our website for current prices

E-mail: sales@oro2u.com

www.oro2u.com

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