ATHENA Timing Chain for SHERCO, HUSQVARNA, KTM, HONDA and GAS GAS 2002-2026

The ATHENA S41400005 timing chain is designed for HUSQVARNA FC 450, FE 450, FS 450, FX 450, KTM EXCF 450, SXF 450, XCF 450, SHERCO SE 300, SEF 250, SEF 300, HONDA CRF 250 and GAS GAS MCF 450 from 2002 to 2026. 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: S41400005
• EAN code: 8057018265787
• Weight: 220 g
• Engine: 4-stroke

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
• Valve cover gasket : BIHR · ATHENA
• Valve shims : PROX · HOT CAMS
• 4-stroke engine oil : LIQUI MOLY 10W40 1 L · MOTUL 10W50

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 MCF 450 2023
GAS GAS MCF 450 2022
GAS GAS MCF 450 2021
HONDA CRF 250 2009
HONDA CRF 250 2008
HONDA CRF 250 2007
HONDA CRF 250 2006
HONDA CRF 250 2005
HONDA CRF 250 2004
HONDA CRF 250 2003
HONDA CRF 250 2002
HUSQVARNA FC 450 2023
HUSQVARNA FC 450 2022
HUSQVARNA FC 450 2021
HUSQVARNA FC 450 2020
HUSQVARNA FC 450 2019
HUSQVARNA FE 450 2023
HUSQVARNA FE 450 2022
HUSQVARNA FE 450 2021
HUSQVARNA FE 450 2020
HUSQVARNA FS 450 2023
HUSQVARNA FS 450 2022
HUSQVARNA FS 450 2021
HUSQVARNA FS 450 2020
HUSQVARNA FS 450 2019
HUSQVARNA FX 450 2023
HUSQVARNA FX 450 2022
HUSQVARNA FX 450 2021
HUSQVARNA FX 450 2020
HUSQVARNA FX 450 2019
KTM EXCF 450 2023
KTM EXCF 450 2022
KTM EXCF 450 2021
KTM EXCF 450 2020
KTM SXF 450 2022
KTM SXF 450 2021
KTM SXF 450 2020
KTM SXF 450 2019
KTM XCF 450 2023
KTM XCF 450 2022
KTM XCF 450 2021
KTM XCF 450 2020
SHERCO SE 300 2013
SHERCO SE 300 2012
SHERCO SEF 250 2026
SHERCO SEF 250 2025
SHERCO SEF 250 2024
SHERCO SEF 250 2023
SHERCO SEF 250 2022
SHERCO SEF 250 2021
SHERCO SEF 250 2020
SHERCO SEF 250 2019
SHERCO SEF 250 2018
SHERCO SEF 250 2017
SHERCO SEF 250 2016
SHERCO SEF 250 2015
SHERCO SEF 250 2014
SHERCO SEF 300 2026
SHERCO SEF 300 2025
SHERCO SEF 300 2024
SHERCO SEF 300 2023
SHERCO SEF 300 2022
SHERCO SEF 300 2021
SHERCO SEF 300 2020
SHERCO SEF 300 2019
SHERCO SEF 300 2018
SHERCO SEF 300 2017
SHERCO SEF 300 2016
SHERCO SEF 300 2015
SHERCO SEF 300 2014