ATHENA Piston Pin 20x12x55 mm for YAMAHA TT 500, XT 500 1976-1989

On YAMAHA TT 500, XT 500 from 1976 to 1989, the ATHENA 20x12x55 mm S41317008 piston pin fits in place of the original part. Small but heavily loaded, the pin transmits the piston's thrust to the connecting rod. A marked or oval pin creates play and noise, and wears the small end.

Specifications

• Brand: ATHENA
• Manufacturer part number: S41317008
• EAN code: 8051757226887
• For ATHENA piston
• Weight: 10 g
• Engine: 4-stroke

When to replace it?

• Metallic knocking at idle or when closing the throttle.
• Pin marked, blued or scored on teardown.
• Noticeable play between the pin and the small end or the piston bosses.

Check the pin at every piston change and replace it as soon as it is marked, blued or has play. A new pin always goes in with new circlips.

Fitting tips

1. Check that the pin diameter and length match your piston (see specifications).
2. Oil the pin, the small end and the piston bosses, then push the pin in by hand, without forcing it.
3. Fit new piston pin circlips, gap opposite the notch, and check they sit properly in their groove.

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

• Top-end gasket kit : see the selection

Frequently asked questions

Is the pin supplied with the piston?
Yes, a new piston comes with its pin. This part is for replacing a worn or lost pin, or for completing a piston sold on its own.

Are the circlips included?
No: plan for new piston pin circlips, as they are never reused.

Compatibility

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

Fits:
YAMAHA TT 500 1981
YAMAHA TT 500 1980
YAMAHA TT 500 1979
YAMAHA TT 500 1978
YAMAHA TT 500 1977
YAMAHA TT 500 1976
YAMAHA XT 500 1989
YAMAHA XT 500 1988
YAMAHA XT 500 1987
YAMAHA XT 500 1986
YAMAHA XT 500 1985
YAMAHA XT 500 1984
YAMAHA XT 500 1983
YAMAHA XT 500 1982
YAMAHA XT 500 1981
YAMAHA XT 500 1980
YAMAHA XT 500 1979
YAMAHA XT 500 1978
YAMAHA XT 500 1977
YAMAHA XT 500 1976