PROX Steel intake valve for YAMAHA TT-R 225, TT-R 230, XT 225, XT 225 S, XT 225 W, YFM 250 R from 1992 to 2026

PROX offers this steel intake valve for YAMAHA TT-R 225, TT-R 230, XT 225, XT 225 S, XT 225 W, YFM 250 R from 1992 to 2026. A four-stroke engine breathes through its valves. The intake valves open to let the air-fuel mixture into the cylinder, then close perfectly tight during combustion.

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 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 YAMAHA TT-R 230?

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

Specifications and fitting tips

• Application: Intake
• Material: Steel
• Manufactured to exact OEM specifications and tolerances
• Steel valves, a direct and affordable OEM replacement

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 : see the selection
• Valve shims : see the selection
• Top-end gasket kit : MOOSE · PROX
• 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:
YAMAHA TT-R 225 2005
YAMAHA TT-R 225 2004
YAMAHA TT-R 225 2003
YAMAHA TT-R 225 2002
YAMAHA TT-R 225 2001
YAMAHA TT-R 225 2000
YAMAHA TT-R 225 1999
YAMAHA TT-R 230 2026
YAMAHA TT-R 230 2025
YAMAHA TT-R 230 2024
YAMAHA TT-R 230 2023
YAMAHA TT-R 230 2022
YAMAHA TT-R 230 2021
YAMAHA TT-R 230 2020
YAMAHA TT-R 230 2019
YAMAHA TT-R 230 2018
YAMAHA TT-R 230 2017
YAMAHA TT-R 230 2016
YAMAHA TT-R 230 2015
YAMAHA TT-R 230 2014
YAMAHA TT-R 230 2013
YAMAHA TT-R 230 2012
YAMAHA TT-R 230 2011
YAMAHA TT-R 230 2009
YAMAHA TT-R 230 2008
YAMAHA TT-R 230 2007
YAMAHA TT-R 230 2006
YAMAHA TT-R 230 2005
YAMAHA XT 225 1998
YAMAHA XT 225 1997
YAMAHA XT 225 1996
YAMAHA XT 225 1995
YAMAHA XT 225 1994
YAMAHA XT 225 1993
YAMAHA XT 225 1992
YAMAHA XT 225 S 1995
YAMAHA XT 225 S 1994
YAMAHA XT 225 S 1993
YAMAHA XT 225 S 1992
YAMAHA XT 225 W 1996
YAMAHA XT 225 W 1995
YAMAHA XT 225 W 1994
YAMAHA XT 225 W 1993
YAMAHA XT 225 WE 1998
YAMAHA XT 225 WE 1997
YAMAHA YFM 250 R 2013
YAMAHA YFM 250 R 2012
YAMAHA YFM 250 R 2011
YAMAHA YFM 250 R 2010
YAMAHA YFM 250 R 2009
YAMAHA YFM 250 R 2008