ATHENA Intake Gasket for YAMAHA YZ 490 1982-1983

On YAMAHA YZ 490 from 1982 to 1983, the ATHENA S410485010010 intake gasket fits in place of the original part. On the intake side, the slightest sealing fault upsets the air-fuel mixture. This gasket makes sure that all the air drawn in goes through the carburettor or the fuel injection.

Specifications

• Brand: ATHENA
• Manufacturer part number: S410485010010
• EAN code: 8051757051700
• Engine: 2-stroke

When to replace it?

• Unstable idle or idle that creeps up on its own, hanging revs.
• Engine running hot or pinking: mixture too lean.
• Gasket crushed or split on removal.

Every time the intake manifold or reed valve block is removed, and as soon as an air leak is suspected.

Fitting tips

1. Clean the gasket faces without scratching them.
2. Fit the gasket dry and properly centred.
3. Tighten the screws in a criss-cross pattern, gradually, to the manufacturer's torque.
4. Take the opportunity to check the reed petals: a chipped or split tip must be replaced straight away.

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

• Reed petals : BOYESEN
• Carburettor repair kit : PROX · ALL BALLS
• Spark plug : NGK

Frequently asked questions

How do I find an air leak?
With the engine idling, spray a little brake cleaner around the intake: if the revs change, air is getting in at that spot.

Compatibility

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

Fits:
YAMAHA YZ 490 1983
YAMAHA YZ 490 1982