PROX Titanium exhaust valve for KAWASAKI KX 450 F from 2009 to 2018

PROX offers this titanium exhaust valve for KAWASAKI KX 450 F from 2009 to 2018. A four-stroke engine breathes through its valves. The exhaust valves open to let the burnt gases out to the pipe, then close again.

Titanium, steel or stainless valve?

This valve is titanium.

• 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 PROX?

ProX valves come from Japanese OEM factories; the titanium versions are forged in one piece and chromium-nitride (CrN) coated against wear.

When should you replace the valves on your KAWASAKI KX 450 F?

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

Specifications and fitting tips

• Application: Exhaust
• Material: Titanium
• Manufactured to exact OEM specifications and tolerances
• Titanium replacement valves manufactured to OEM standards

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

• Valve stem seals : PROX · CENTAURO
• Valve shims : PROX 29.VSA948 · PROX 29.948
• Top-end gasket kit : MOOSE · ATHENA
• 4-stroke engine oil : MOTUL 10W50 · LIQUI MOLY 10W40 1 L

Compatibility

Check the exact model and year of your bike in the list below before ordering.

Fits:
KAWASAKI KX 450 F 2018
KAWASAKI KX 450 F 2017
KAWASAKI KX 450 F 2016
KAWASAKI KX 450 F 2015
KAWASAKI KX 450 F 2014
KAWASAKI KX 450 F 2013
KAWASAKI KX 450 F 2012
KAWASAKI KX 450 F 2011
KAWASAKI KX 450 F 2010
KAWASAKI KX 450 F 2009