WISECO steel Exhaust Valve for KTM SXF 250 and HUSQVARNA FC 250 2013-2015

The WISECO acier WSVK6333-E exhaust valve is designed for KTM SXF 250 and HUSQVARNA FC 250 from 2013 to 2015. 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: WISECO
• Manufacturer part number: WSVK6333-E
• Sold as a kit (see part number)
• Weight: 450 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

1. Have the valve seats recut and check the guides.
2. Fit new valve stem seals and check the springs.
3. Set the valve clearance with valve shims if needed, then check it again after the first few hours.
4. Refit with a valve cover gasket in good condition.

Why WISECO?

Based in Mentor, Ohio, Wiseco designs, forges and machines its parts in the United States. Pistons, valves and clutch parts: the brand is known for forged parts built for hard-working engines.

Spare parts and items to plan

• Valve stem seals : PROX · CENTAURO
• Valve shims : PROX 29.890 · PROX 29.VSA890
• Valve cover gasket : MOOSE 819037MSE · MOOSE 817843MSE

Frequently asked questions

Do both valves need replacing?
Yes, exhaust valves are usually replaced as a pair, with the seats recut.

Titanium or steel?
Steel is more tolerant of wear and is perfectly suited to leisure riding; titanium, which is lighter, is the original choice in many motocross engines. Follow the manufacturer's recommendations for the springs.

Compatibility

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

Fits:
HUSQVARNA FC 250 2015
HUSQVARNA FC 250 2014
KTM SXF 250 2015
KTM SXF 250 2014
KTM SXF 250 2013