WOSSNER exhaust valve kit

WOSSNER offers this exhaust valve kit. In a four-stroke engine, the valves open and close the way in for the mixture and the way out for the gases.

Titanium, steel or stainless valve?

This valve is steel.

• Titanium: about 40 % lighter than steel, it lets the engine rev high without valve float; standard on most modern 4-stroke motocross bikes. On the downside, it costs more and its coating wears faster if seats and guides are tired.
• Steel or stainless: heavier but very wear-resistant and cheaper; as a titanium replacement it lasts longer, with springs suited to its weight.
• Tip: replace valves as a set, have the seats checked and fit new valve stem seals.

Why choose WOSSNER?

Wössner, the German company founded by a former racer, forges its own parts: design and manufacturing are controlled end to end.

When should you replace the valves?

Hard hot starting, valve clearance that keeps closing up or a noisy timing chain: the valve train is wearing.

Specifications and fitting tips

• Material: Steel
• Steel kits designed for durability and trouble-free operation
• Valve kits supplied with valves and springs

Cross-Mania tip: Check the guides and seats before reassembly and lap the valves in. Titanium valves must not be fitted on worn seats.

Also needed with this part

• 4-stroke engine oil : LIQUI MOLY 10W40 1 L · MOTUL 10W50

Compatibility

Universal part: check the dimensions before ordering.