ORO2U Dirt Catalogue - Section E - Engine and Performance.

Wossner

Piston Kits

GASGAS 4-Stroke Models

Years

Size

Piston Kit

Piston Rings

Piston Pin 56-7924.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 56-7931.WO 56-7984.WO 56-7984.WO 56-7984.WO 56-7984.WO 56-7984.WO 56-7927.WO 56-7927.WO 56-7973.WO 56-7973.WO 56-7927.WO 56-7927.WO 56-7982.WO 56-7982.WO 56-7982.WO 56-7982.WO 56-7927.WO 56-7927.WO 56-7927.WO

Piston Clips 56-0153.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 56-0153.WO 56-0153.WO 56-0153.WO 56-0153.WO 56-0153.WO 56-0155.WO 56-0155.WO 56-0153.WO 56-0153.WO 56-0155.WO 56-0155.WO

Small End Bearing

TXT 300

All Years 79mm 2010 - 15 77mm 2010 - 15 77mm 2021 - 23 78mm 2021 - 23 78mm 2021 - 23 78mm 2021 - 23 78mm 2021 - 23 78mm 2021 - 23 78mm 2013 - 15 83mm 2021 - 23 88mm 2021 - 23 88mm 2022 - 23 88mm 2022 - 23 88mm 2022 - 23 88mm

56-W180.WO 56-W189.WO 56-W188.WO 56-W954.A.WO 56-W955.A.WO 56-W265.A.WO

56-R389

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

EC 250F 3-Ring

56-R407.WO 56-R407.WO 56-R323.WO 56-R323.WO 56-R323.WO 56-R323.WO 56-R323.WO 56-R323.WO 56-R309.WO 56-R333.WO 56-R333.WO 56-R333.WO 56-R333.WO 56-R333.WO 56-R305.WO 56-R328.WO 56-R554.WO 56-R554.WO 56-R305.WO

2-Ring

EC 250F Comp 14.23

Comp 14.50

EX 250F Comp 14.4

Comp 14.6

56-W265.A.WO.HC

MC 250F Comp 14.4

56-W265.A.WO

Comp 14.6

56-W265.A.WO.HC

EC 300F EC 350F

56-W912.WO

56-W8822.A.WO 56-W4735+00A.WO 56-W4736+00A.WO 56-W4735+00A.WO 56-W4736+00A.WO

EX 350F Comp 14.2

Comp 15.20

MC 350F Comp 14.20

Comp 15.20

EC 450F EC 450F

2005

95mm

56-W220.WO 56-W221.A.WO 56-W222.WO 56-W223.WO 56-W025.WO 56-W221.WO 56-W956.A.WO

2006 - 12 97mm 2013 - 15 95mm 2013 - 15 95mm 2003 - 04 95mm 2006 - 09 97mm 2021 - 23 95mm 2021 - 23 95mm 2021 - 23 95mm 2021 - 23 95mm 2005 - 06 95mm 2007 - 09 97mm

EC 450F Comp. 12.3:1

High Comp. 13.5:1

HP / EC / FSE 450 HP / EC / FSE 450

56-R307

MC 450F Comp. 12.60

56-R329.WO 56-R329.WO 56-R329.WO 56-R329.WO 56-R305.WO

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

Comp. 13.60

56-W956.A.WO.HC

EX 450F Comp. 12.60

56-W956.A.WO

Comp. 12.60

56-W956.A.WO.HC

SMR 450 SMR 450

56-W220.WO 56-W221.WO 56-W242.WO

56-0155.WO 56-0155.WO 56-0155.WO

56-R307

SM 515

2009

100mm

56-R501.WO

HONDA 2-Stroke Models

Years

Size

Piston Kit

Piston Rings

Piston Pin 56-709.WO 56-709.WO 56-7930.WO 56-7930.WO 56-7930.WO 56-786.WO 56-786.WO 56-786.WO 56-786.WO

Piston Clips 56-005.WO 56-005.WO 56-006.WO

Small End Bearing

CR 80 CR 80

1980 - 82 49.5mm

56-W450.WO

– –

56-811.WO 56-811.WO 56-7995.WO 56-7995.WO 56-7995.WO 56-813.WO 56-813.WO 56-813.WO 56-823.WO 56-813.WO 56-814.WO 56-814.WO 56-814.WO 56-814.WO 56-814.WO 56-814.WO

1983

49.5mm

56-W493+000.WO 56-W041.WO 56-W643.A.WO 56-W833.A.WO 56-W339+0.00.WO 56-W430+P0.WO 56-W448+P0.WO 56-W563+000.WO 56-W553+0.WO 56-W564+P0.WO 56-W595+00A.WO

CR 80 International Bore

1986 - 02 46mm 1992 - 02 47mm 2003 - 07 47.5mm 1973 - 78 56mm

56-R556.WO 56-R905.WO

US Bore

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

CR 85 CR 125 CR 125 CR 125 CR 125 CR 125 CR 125 CR 125 CR 125 CR 125 CR 125 CR 125

56-R352 56-R365 56-R365

1979

56mm

1980 - 84 55.5mm 1985 - 86 54mm

56-R006.WO

56-R421

1987

54mm

56-R405+P0.1.WO 56-786.WO 56-R405+P0.1.WO 56-783.WO 56-R405+P0.1.WO 56-783.WO 56-R405+P0.1.WO 56-783.WO 56-R405+P0.1.WO 56-783.WO 56-R405+P0.1.WO 56-783.WO 56-R405+P0.1.WO 56-783.WO

1988 - 89 54mm 1990 - 91 54mm 1992 - 99 54mm 2000 - 03 54mm

56-W613.A.WO 56-W676.A.WO

2004

54mm

56-W840+00A.WO 56-W859.A.WO 56-W903+000.WO

2005 - 07 54mm 1983 - 87 56mm

MBX / MTX 125 MTX 125 Rally

56-R365 56-R365

56-7925.WO.41 56-7925.WO.41

56-0152.WO 56-0152.WO

– –

1988 - 99 56mm 56-W905.A

CR 250 CR 250 CR 250 CR 250 CR 250 CR 250

1973 - 74 70mm 1975 - 77 70mm 1978 - 80 70mm 1981 - 83 66mm 1984 - 85 66mm

56-W337+00A.WO

56-R487.WO 56-R487.WO 56-R487.WO 56-R480.WO 56-R480.WO

56-7924.WO 56-7924.WO 56-7924.WO 56-7924.WO 56-7924.WO

56-0153.WO 56-801.WO 56-0153.WO 56-801.WO 56-0153.WO 56-801.WO 56-0153.WO 56-801.WO 56-0153.WO 56-801.WO 56-0153.WO 56-801.WO 56-0153.WO 56-801.WO 56-0153.WO 56-801.WO 56-0153.WO 56-801.WO 56-0153.WO 56-801.WO 56-0153.WO 56-801.WO

56-W338+0

56-W431+P0.WO 56-W466+P0.WO 56-W526.P0.WO

1986 - 96 66.4mm 56-W614.A.W

56-R420.2.WO 56-7924.WO 56-R420.1.WO 56-7924.WO 56-R420.2.WO 56-7924.WO 56-R420.2.WO 56-7924.WO 56-R420.1.WO 56-7924.WO 56-R420.2.WO 56-7924.WO

CR 250 Single ring

1997 - 01 66.4mm 1997 - 01 66.4mm 2002 - 04 66.4mm 2005 - 07 66.4mm 2005 - 07 66.4mm

56-W703+00A.WO

2-Ring

56-W702.A.WO

CR 250 2-Ring

56-W801+00A.WO 56-W134+00A.WO 56-W860+00A.WO 56-W130+00A.WO ** 56-W554+000.WO

CR 250 Single ring

2-Ring

CRM 250

All

66mm

56-R480.WO 56-R430.WO

56-731 56-789

56-0154

CR 500

1984 - 01 89mm

56-0155.WO 56-828.WO

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!

* 56-W177.WO This piston has drilled oil holes and does NOT have Teflon coated skirts. ** 56-W130.WO This piston comes with a 19mm Gudgeon Pin. + 56-W227.WO This piston has drilled oil holes and does NOT have Teflon coated skirts.

*Please visit our website for current prices E23b

E-mail: sales@oro2u.com

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