Wössner are regarded by Europe’s leading motor sport engine builders as being the piston of choice when building an engine not only to perform, but to withstand the stresses and duress’s of competition life.

Wössner pistons feature a unique Moly coating on the skirts and a grade of 4032 Alloy (T6) which allows the engine builder to run a closer piston to bore tolerance then he might do on another make of piston. This helps remove the slapping noise during cold start, common place among engines running forged pistons due to larger then OE bore clearances.

The crowns of the pistons are also mirror polished to better resist detonation on a high performance engine. Mirror polishing allows a more even spread of heat inside the chamber which will help prevent “hot spots” on piston crowns.

YAMAHA
R1 - YZF1000 2004 - 2006,

• Wossner forged pistons are superior in strength and design.
• Engineered to provide the best possible path for combustion chamber heat transfer to cylinder walls.
• Elliptically designed to provide a more uniform bearing surface under piston heat expansion, eliminating localized pressure and distributing thrust loads more evenly, thereby preventing piston collapse.
• Made in Germany.

YAMAHA YZF R6 2006-2011 4 Stroke, Comp. 13:1

WOSSNER FORGED PISTON K8752DA-4 Bore

Clip part no - CW17

Piston pin- WP0111

Ring set -770XAS-2

Display (cm3) 998 / 1023

Hub stroke (mm) 53.60

Clearance (mm) 0.04

Wossner compression Ratio: 13.50:1

OEM Compression ratio: 12.50:1

Dome volume (cm3)   -4.70

Compression height (mm) 22.80