ATHENA Ignition Cover Gasket for YAMAHA YZ 100 1978-1981

On YAMAHA YZ 100 from 1978 to 1981, the ATHENA S410485017049 ignition cover gasket fits in place of the original part. On the left-hand side of the engine, the ignition cover protects the flywheel and the stator. Its gasket keeps it sealed: a crushed or torn gasket lets oil, water or dust through.

Specifications

• Brand: ATHENA
• Manufacturer part number: S410485017049
• EAN code: 8051757201464
• Weight: 50 g
• Engine: 2-stroke

When to replace it?

• Oil seeping around the edge of the ignition cover.
• Water or mud inside the cover after washing.
• Gasket torn or stuck on removal.

Every time the ignition cover comes off: stator check, replacement of an ignition-side crankshaft oil seal or bottom end rebuild.

Fitting tips

1. Clean both gasket faces without scratching them.
2. Fit the gasket dry; a dab of grease can hold it in place during reassembly.
3. Tighten the screws in a criss-cross pattern, without forcing, to the manufacturer's torque.
4. On an engine where the ignition runs in oil, top up the oil level after reassembly.

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

• Complete engine gasket kit : CENTAURO · ATHENA
• Clutch cover gasket : ATHENA · CENTAURO
• 2-stroke oil : LIQUI MOLY 1 L · MOTUL 800 1 L

Frequently asked questions

Can I reuse the old gasket?
No: a paper or fibre gasket tears or stays crushed when removed. If you're opening several covers, a complete engine gasket kit often works out cheaper.

Compatibility

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

Fits:
YAMAHA YZ 100 1981
YAMAHA YZ 100 1980
YAMAHA YZ 100 1979
YAMAHA YZ 100 1978