ORO2U Dirt Catalogue - Section E - Engine and Performance.

Piston Kits

Wossner

Wossner Piston Kits Wossner Pistons, Germany’s finest aftermarket forged piston and rod manufacturer. 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.

HONDA 4-Stroke Models

Years

Size

Piston Kit

Piston Rings

Piston Pin 56-7930.WO 56-7930.WO 56-7930.WO 56-7930.WO 56-701.WO 56-701.WO 56-701.WO 56-701.WO 56-7972.WO 56-7931.WO 56-7931.WO 56-7931.WO 56-7981.WO 56-7981.WO 56-7981.WO 56-7981.WO 56-7981.WO 56-7981.WO 56-7981.WO

Piston Clips

Small End Bearing

CRF 150R High Comp. 12.5:1

2007 - 09 66mm 2007 - 09 70mm 2012 - 22 66mm 2012 - 22 66mm 1986 - 91 65.5mm 1986 - 91 65.5mm 2003 - 19 65.5mm 2008 - 09 65.5mm 2013 - 17 76mm 2004 - 05 78mm 2004 - 09 78mm 2006 - 09 78mm 2010 - 13 76.8mm 2014 - 15 76.8mm 2016 - 17 76.8mm 2018 - 19 79mm

56-W4924+00A.WO 56-W4924+400.WO

56-R852 56-R349 56-R852 56-R852

56-0150 56-0150 56-0150 56-0150 56-0151 56-0151 56-0151 56-0151

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

Big Bore

CRF 150R Comp. 11.7:1

56-W914.A.WO 56-W921.A.WO

High Comp. 12.2:1

XR / XL185

56-W4156.000.WO 56-W4156.000.WO 56-W4816+00A.WO 56-W4816+00A.WO 56-W9703.76.WO 56-W4829.A.WO 56-W4852.A.WO 56-W4830+00A.WO

– – – –

XR 200

CRF 230F Comp. 11:1 CRF 230L Comp. 11:1

CRF 250L CRF 250R

56-R551.WO 56-R557.WO 56-R557.WO 56-R557.WO 56-R567.WO 56-R567.WO 56-R567.WO 56-R326.WO 56-R326.WO 56-R326.WO 56-R326.WO 56-R551.WO 56-R323.WO 56-R323.WO 56-R211.WO

56-0160.WO

56-0154

CRF 250R Hi-Comp 13.9:1

56-0152.WO

CRF 250R

56-0154

CRF 250R Comp 14.2:1 CRF 250R Hi-Comp 14.5:1

56-W950.A.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 56-0152.WO 56-0152.WO

56-W958.A.WO.HC 56-W8800.00A.WO 56-W8806.WO 56-W4788.A.WO 56-W4788.A.WO_H 56-W8806.A.WO 56-W9703.76.WO 56-W4829.A.WO 56-W4852.A.WO 56-W4171+P0.A 56-W4329.000.WO 56-W4466_000.WO 56-W4171+P0.A 56-W4171+P0.A 56-W4171+P0.A 56-W4329.000.WO 56-W4466+000.WO 56-W4466+400.WO 56-W4286+00A.WO

CRF 250R CRF 250R

CRF 250R / RX Comp 13.90

2020 - 23 2020 - 23

79mm 79mm 79mm 76mm

Comp 14.50

CRF 250 RX CRF 250 Rally

2019 2017

56-7972

CRF 250 X Comp 12:9.1

2004 - 17 78mm 2004 - 17 78mm 1979 - 83 74mm 1984 - 85 75mm 1991 - 96 73mm 1979 - 82 74mm 1979 - 83 74mm

56-7981.WO 56-7981.WO

Hi-Comp 13:9.1

XL 250

56-7964

56-0154

XL 250R XL 250L XL 250S XR 250 XR 250 XR 250 XR 250 XR 250 XR 350

56-R362 56-R277

56-7936.WO 56-7936.WO

56-0160.WO 56-0160.WO

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

56-7964 56-7964 56-7964

56-0154 56-0154 56-0154

1983

74mm

1984 - 85 75mm 1986 - 04 73mm 1986 - 99 77mm 1983 - 85 84mm 1981 - 82 89mm 1996 - 04 85mm 2002 - 03 96mm

56-R362 56-R277 56-R821 56-R302 56-R363

56-7936.WO 56-7936.WO 56-7936.WO 56-7933.WO 56-7933.WO 56-7909.WO

56-0160.WO 56-0160.WO 56-0160.WO 56-0161.WO 56-0161.WO 56-0155.WO

XR 400 l XLS 400

56-W310+000

XR 400

56-W4606+00A.WO 56-W4820.A.WO

56-R482.WO 56-R558.WO 56-R558.WO 56-R558.WO 56-R558.WO 56-R559.WO 56-R559.WO 56-R558.WO 56-R558.WO 56-R558.WO 56-R558.WO 56-R558.WO 56-R325.WO 56-R325.WO 56-R558.WO 56-R306.WO

CRF 450R CRF 450R

56-7926 56-7926 56-7926 56-7926 56-7926 56-7926 56-7926 56-7926 56-7964

56-0154 56-0154 56-0154 56-0154 56-0154 56-0154 56-0154 56-0154 56-0154 56-0154 56-0154 56-0154 56-0154 56-0154 56-0154

2004

96mm 56-W182.A

CRF 450R Comp. 12:1

2005 - 08 96mm 56-W183.A

Hi-Comp. 13.5:1

2002 - 08 96mm 2002 - 08 100mm

56-W4822.WO 56-W205.WO

Big Bore Comp. 11.8:1 Big Bore Comp. 12.0:1

2002 - 08 100mm 56-W4820.4.0

CRF 450R 12:1 Comp

2009 - 12 96mm 2009 - 12 96mm 2013 - 14 96mm 2013 - 14 96mm 2015 - 16 96mm

56-W4978.WO 56-W4978.WO.H 56-W916.WO 56-W916.WO.H

Hi-Comp. 13.5:1

CRF 450R Standard Comp 12.5:1

Hi-Comp. 13.8:1

56-7924.WO 56-7924.WO

CRF 450R Comp 12.5:1 CRF 450R / RX Comp 13.5:1

56-W927.WO

2017 - 23 2017 - 23

96mm 96mm

56-W9949.A.WO 56-W9949.A.WO.H **

56-7964 56-7964 56-7926

Hi-Comp. 14.0:1

CRF 450X Comp. 12:1

2005 - 17 96mm 56-W183.A

– – – – – – – – – – – –

2019 - 23

CRF 450X XLR 500 XLS 500 XR 500R XR 600R

96mm

56-W8811.WO 56-W310+000 56-W310+000 56-W310+000

1979 - 84 89mm 1979 - 82 89mm 1979 - 82 89mm 1985 - 00 97mm 1983 - 87 100mm 1993 - 02 100mm 1993 - 99 100mm 1993 - 21 100mm 2000 - 07 100mm 2000 - 07 100mm

56-R363 56-R363 56-R363 56-R307

56-7933.WO 56-7933.WO 56-7933.WO 56-7915.WO 56-7915.WO 56-7915.WO 56-7915.WO 56-7915.WO

56-0161.WO 56-0161.WO 56-0161.WO 56-010.WO 56-010.WO 56-010.WO 56-010.WO 56-010.WO

56-W4577.A.WO 56-W926.A.WO 56-W4562.00A.WO 56-W4562.00A.WO 56-W4562.00A.WO 56-W4715.000.WO 56-W4719+00A.WO

XL600R Radial Head Pro Series

56-R501.WO 56-R501.WO 56-R501.WO 56-R501.WO 56-R501.WO 56-R501.WO

NX 650 Domnator

XR 650C XR 650L

XR 650R Comp 10.0:1

56-7955 56-7955

56-0157 56-0157

Hi-Comp. 11:1

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

**Requires NGK plug R0465B-10 to be used with this piston

*Please visit our website for current prices E24

www.oro2u.com

Tel: 01597 822 666

Fax: 01597 825 224

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