ORO2U Road Catalogue - Section E - Engine and Performance.

Piston Kits

Wiseco & Wossner

Wiseco Piston Kits (WI) Extreme racing conditions demand the strength and toughness that only forged pistons can offer. Compared to cast pistons, forgings are tougher and more durable, and will stand up to the abuse that high performance motorsport applications require. Most castings are brittle, have no grain structure and tend to fail catastrophically when the material yield strength is exceeded. Forgings have condensed grain that is aligned to the features of the part, which produces higher mechanical properties, and resistance to impact and fatigue.

Wossner Piston Kits (WO) Wossner are the innovative specialists for high performance pistons. Wossner products are to be found in engines operating at the highest levels of motorsport, in competition and, of course, in everyday use – in fact, anywhere where longevity and operational noise are important factors. Wössner products are the source of the superior power behind the success of well known motor sport teams at national and international race meets.

YAMAHA Models

Years Size Piston Kit

Piston Rings Piston Pin

Piston Clips

Small End Bearing

YFZ1000 Thunderace

1997 - 98 77mm 1999 - 03 74mm

.7700 .7400

56-W9733 56-W9734

YFZ-R1 YFZ-R1 YFZ-R1 YFZ-R1 YFZ-R1 YFZ-R1

2004 - 06 77mm 56-W9735-7700

2004 - 06 77mm 2007 - 08 77mm 2007 - 08 77mm 2009 - 15 78mm 2001 - 05 74mm

.000.WO

.WO

.WO

56-W9876 56-W9736 56-W9901 56-W9902 56-W9734

56-R407

56-0160

.7700

.000.WO .000.WO

FZ1

.7400

FZR 1000R EXUP FZR 1000R EXUP R1 / FZR / RX1 R1 / FZR / RX1

1989 - 96 77mm 56-W9903.150.WO

2017 - 21 77mm 1999 - 03 74mm 2001 - 05 74mm 1978 - 81 74mm

.150.WO

56-W9999 56-W9900 56-W9900 56-W9738 56-W9739 56-W9739 56-W9738 56-W9739 56-W9739 56-W9739 56-W9739 56-W9740 56-W9740

.000 .000

XS 1100 FJ 1100 FJ1100 XS1100 FJ 1200 FJ1200 XJR 1200

.7400 .7800 .7900 .7400 .7800 .7900 .7800 .8100 .95.FR .95.FR

1985

78mm

1995 - 99 79mm 1978 - 81 74mm 1986 - 93 78mm 1995 - 99 79mm 1995 - 99 78mm All Years 81mm 1999 - 03 95mm 1999 - 03 95mm

European XJR 1300

Road Star 1600

VX1600

*Please visit our website for current prices

* Note; Most Kits are available from standard size up to +2.00mm over size *

RE18

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Tel: 01597 822 666

Fax: 01597 825 224

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