ATHENA Timing Chain for KTM, HUSQVARNA and GAS GAS 2016-2024

The ATHENA S41400018 timing chain is designed for KTM EXC 250, EXCF 250, EXCF 350, SXF 250, SXF 350, XCF 250, XCF 350, XCFW 350, HUSQVARNA FC 250, FC 350, FE 250, FE 350, FX 350 and GAS GAS ECF 250, ECF 350, EXF 250, EXF 350, MCF 250 from 2016 to 2024. On a four-stroke, the timing chain links the crankshaft to the camshafts. A tired chain gets noisy, upsets the timing and can jump a tooth: with valves hitting the piston, the damage is severe.

Specifications

• Brand: ATHENA
• Manufacturer part number: S41400018
• EAN code: 8057018265909
• Weight: 260 g

When to replace it?

• Rattling or chain noise on the timing side, especially at idle.
• Tensioner at the end of its travel.
• Timing marks that no longer line up.

At the intervals in the service manual, and as soon as the tensioner reaches the end of its travel. Check the sprockets and the guides at the same time.

Fitting tips

1. Set the engine at top dead centre on the compression stroke, marks aligned, before removing anything.
2. On most motocross engines the chain is endless, with no master link: replacing it means removing the crankshaft sprocket or a camshaft, as described in the manual.
3. Line the camshafts up with their timing marks again, then put the tensioner back under tension.
4. Turn the engine over two full turns by hand and check the timing again before starting.
5. Refit with a valve cover gasket in good condition.

Why ATHENA?

Founded in 1973 near Vicenza, Athena is an Italian engine gasket specialist that has made its gaskets on its own production lines since day one, as well as a renowned manufacturer of pistons and cylinder kits. The brand supplies original equipment to manufacturers such as KTM, Ducati, Fantic, Piaggio and Triumph, and is a partner of the MXGP motocross world championship.

Spare parts and items to plan

• Cam chain tensioner : GE.CO 200.040.000 · GE.CO 200.040.004
• Valve cover gasket : MOOSE 819049MSE · MOOSE 819037MSE
• Valve shims : PROX 29.890 · PROX 29.VSA890
• 2-stroke oil : LIQUI MOLY 1 L 3065 · LIQUI MOLY 1 L 3063

Frequently asked questions

Should I replace the tensioner?
Check it: a worn tensioner, or one at the end of its travel, must be replaced along with the chain.

Compatibility

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

Fits:
GAS GAS ECF 250 2023
GAS GAS ECF 250 2022
GAS GAS ECF 250 2021
GAS GAS ECF 350 2023
GAS GAS ECF 350 2022
GAS GAS ECF 350 2021
GAS GAS EXF 250 2023
GAS GAS EXF 250 2022
GAS GAS EXF 250 2021
GAS GAS EXF 350 2023
GAS GAS EXF 350 2022
GAS GAS EXF 350 2021
GAS GAS MCF 250 2023
GAS GAS MCF 250 2022
GAS GAS MCF 250 2021
HUSQVARNA FC 250 2022
HUSQVARNA FC 250 2021
HUSQVARNA FC 250 2020
HUSQVARNA FC 250 2019
HUSQVARNA FC 250 2018
HUSQVARNA FC 250 2017
HUSQVARNA FC 250 2016
HUSQVARNA FC 350 2022
HUSQVARNA FC 350 2021
HUSQVARNA FC 350 2020
HUSQVARNA FC 350 2019
HUSQVARNA FC 350 2018
HUSQVARNA FC 350 2017
HUSQVARNA FC 350 2016
HUSQVARNA FE 250 2023
HUSQVARNA FE 250 2022
HUSQVARNA FE 250 2021
HUSQVARNA FE 250 2020
HUSQVARNA FE 250 2019
HUSQVARNA FE 250 2018
HUSQVARNA FE 250 2017
HUSQVARNA FE 350 2023
HUSQVARNA FE 350 2022
HUSQVARNA FE 350 2021
HUSQVARNA FE 350 2020
HUSQVARNA FE 350 2019
HUSQVARNA FE 350 2018
HUSQVARNA FE 350 2017
HUSQVARNA FX 350 2022
HUSQVARNA FX 350 2021
HUSQVARNA FX 350 2020
HUSQVARNA FX 350 2019
HUSQVARNA FX 350 2018
HUSQVARNA FX 350 2017
KTM EXC 250 2024
KTM EXCF 250 2023
KTM EXCF 250 2022
KTM EXCF 250 2021
KTM EXCF 250 2020
KTM EXCF 250 2019
KTM EXCF 250 2018
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 SXF 250 2022
KTM SXF 250 2021
KTM SXF 250 2020
KTM SXF 250 2019
KTM SXF 250 2018
KTM SXF 250 2017
KTM SXF 250 2016
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 XCF 250 2019
KTM XCF 250 2018
KTM XCF 250 2017
KTM XCF 250 2016
KTM XCF 350 2023
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 XCFW 350 2024
KTM XCFW 350 2023
KTM XCFW 350 2022
KTM XCFW 350 2021
KTM XCFW 350 2020