ATHENA Valve Stem Seals for KTM EXCF 350, FREERIDE 350, SXF 350, XCF 350, XCFW 350 and GAS GAS ECF 350, EXF 350 2011-2023

ATHENA offers these valve stem seals for KTM EXCF 350, FREERIDE 350, SXF 350, XCF 350, XCFW 350 and GAS GAS ECF 350, EXF 350 2011-2023. Each valve slides in a guide. At the top of the guide, a small seal (the valve stem seal) lets through just enough oil to lubricate but stops it running into the combustion chamber.

Why replace the valve stem seals?

The benefits:

• To be replaced every time the valves are removed.
• Cure oil consumption and blue smoke on start-up.
• An inexpensive part that protects valves and guides.

Why choose ATHENA?

Athena, founded in 1973 by Giovanni Mancassola near Vicenza and based in Alonte (Italy), designs gaskets, pistons and cylinder kits; it supplies original equipment to manufacturers such as KTM, Ducati, Fantic and Triumph.

When should you replace this part?

Blue smoke on start-up after standing overnight is the typical sign of hardened seals. They are also replaced at every head rebuild, even if they look fine.

Specifications and fitting tips

• Manufacturer part number: M739000040411

Spare parts and items to plan

• Valves : ATHENA · WISECO
• Valve shims : PROX 29.VSA890 · PROX 29.890
• Valve cover gasket : MOOSE 817977MSE · MOOSE 819049MSE

Compatibility

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

Fits:
GAS GAS ECF 350 2023
GAS GAS ECF 350 2022
GAS GAS ECF 350 2021
GAS GAS EXF 350 2023
GAS GAS EXF 350 2022
GAS GAS EXF 350 2021
KTM EXCF 350 2023
KTM EXCF 350 2022
KTM EXCF 350 2021
KTM EXCF 350 2020
KTM EXCF 350 2019
KTM EXCF 350 2018
KTM EXCF 350 2017
KTM EXCF 350 2016
KTM EXCF 350 2015
KTM EXCF 350 2014
KTM EXCF 350 2013
KTM EXCF 350 2012
KTM FREERIDE 350 2017
KTM FREERIDE 350 2016
KTM FREERIDE 350 2015
KTM FREERIDE 350 2014
KTM FREERIDE 350 2013
KTM FREERIDE 350 2012
KTM SXF 350 2022
KTM SXF 350 2021
KTM SXF 350 2020
KTM SXF 350 2019
KTM SXF 350 2018
KTM SXF 350 2017
KTM SXF 350 2016
KTM SXF 350 2015
KTM SXF 350 2014
KTM SXF 350 2013
KTM SXF 350 2012
KTM SXF 350 2011
KTM XCF 350 2022
KTM XCF 350 2021
KTM XCF 350 2020
KTM XCF 350 2019
KTM XCF 350 2018
KTM XCF 350 2017
KTM XCF 350 2016
KTM XCF 350 2015
KTM XCF 350 2014
KTM XCF 350 2013
KTM XCF 350 2012
KTM XCF 350 2011
KTM XCFW 350 2022
KTM XCFW 350 2021
KTM XCFW 350 2020
KTM XCFW 350 2016
KTM XCFW 350 2015
KTM XCFW 350 2014
KTM XCFW 350 2013
KTM XCFW 350 2012