- New
PROX titanium Exhaust Valve for KTM SX 450 2003-2006
€103.90
Tax Included
PROX titane exhaust valve for KTM SX 450 from 2003 to 2006.
The PROX titane 28.6423-1 exhaust valve is designed for KTM SX 450 from 2003 to 2006. The exhaust valve opens to let out the very hot burnt gases. It is the valve most exposed to heat: as it and its seat wear, the valve clearance closes up and the valve eventually stops closing.
Specifications
- Brand: PROX
- Manufacturer part number: 28.6423-1
- Weight: 40 g
- Engine: 4-stroke
When to replace it?
- Valve clearance closing up from one check to the next.
- Hard hot starting, loss of compression.
- Marked valve face or cupped valve when removed.
As soon as the valve clearance no longer holds between two checks. Always replace the valves on the same side together and have the seats recut.
Fitting tips
- Have the valve seats recut and check the guides.
- Don't lap a coated titanium valve with grinding paste: it would destroy the coating.
- Fit new valve stem seals and check the springs.
- Set the valve clearance with valve shims if needed, then check it again after the first few hours.
- Refit with a valve cover gasket in good condition.
Why PROX?
Founded in 1975 and based near Amsterdam, ProX specialises in engine and clutch wear parts for off-road bikes. The brand has most of its range made in Japan, by OEM suppliers, for quality on a par with the original parts.
Spare parts and items to plan
- Valve stem seals : KIBBLEWHITE · ATHENA
- Valve shims : MOOSE · HOT CAMS
- Valve cover gasket : ATHENA · CENTAURO
Frequently asked questions
Do both valves need replacing?
Yes, exhaust valves are usually replaced as a pair, with the seats recut.
Titanium or steel?
Titanium is much lighter: the valve train copes better with high revs. Steel is more tolerant of wear and is perfectly suited to leisure riding; don't mix the two materials without following the manufacturer's recommendations (springs).
Compatibility
Check the exact model and year of your bike in the list below before ordering.
Fits:
KTM SX 450 2006
KTM SX 450 2005
KTM SX 450 2004
KTM SX 450 2003
28.6423-1
5 Items
Specific References
Click on your bike to see all compatible parts.
No customer reviews for the moment.
PROX titane exhaust valve for KTM SX 450 from 2003 to 2006.
PROX titanium Exhaust Valve for KTM SX 450 2003-2006
€103.90
Tax Included