PROX Titanium exhaust valve for KAWASAKI KX 250 F from 2017 to 2019

PROX offers this titanium exhaust valve for KAWASAKI KX 250 F from 2017 to 2019. 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 250 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
• ProX titanium valves are manufactured to high quality standards
• High-tech Ti3Al alloy forged in one piece for increased strength

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 35.VS021 · PROX P650901/4
• Valve shims : PROX · HOT CAMS
• Top-end gasket kit : ATHENA · MOOSE
• 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 250 F 2019
KAWASAKI KX 250 F 2018
KAWASAKI KX 250 F 2017