ATHENA Piston Ring Set Ø66.4 mm for KTM, HUSQVARNA, HUSABERG, GAS GAS and BETA 2005-2024

Name: ATHENA Piston Ring Set Ø66.4 mm for KTM, HUSQVARNA, HUSABERG, GAS GAS and BETA 2005-2024
Brand: ATHENA
SKU: S41316428
Price: 21.9 EUR
Availability: InStock

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€21.90

Tax Included

Disponible en nuestro proveedor, enviado en 10 a 15 días.

ATHENA set of piston rings Ø 66.4 mm for KTM EXC, SX, XC, XCW 250, GAS GAS EC, EX, MC 250, HUSQVARNA TC, TE 250, BETA RR 250 and HUSABERG TE 250 from 2005 to 2024.

The ATHENA S41316428 set of piston rings (Ø 66.4 mm) is designed for KTM EXC 250, SX 250, XC 250, XCW 250, GAS GAS EC 250, EX 250, MC 250, HUSQVARNA TC 250, TE 250, BETA RR 250 and HUSABERG TE 250 from 2005 to 2024. Piston rings sit in the grooves of the piston. They seal between the piston and the cylinder, carry heat from the piston into the cylinder and, on a four-stroke, scrape oil off the cylinder walls. Once worn, they let compression leak past: the engine loses its punch.

Specifications

Brand: ATHENA
Manufacturer part number: S41316428
EAN code: 8053300712120
For ATHENA piston
Diameter: 66.4 mm
Engine: 2-stroke

When to replace it?

Loss of compression and power, harder starting.
Ring end gap, measured in the cylinder, larger than the figure in the manual.
Ring stuck in its groove or showing traces of blow-by.

At every top end inspection, and at the latest when the piston is replaced. On a piston that is still within spec, new rings at mid-life bring the compression back. As a Cross-Mania guideline, the complete piston is replaced every 20 to 40 hours of engine running depending on whether you race or ride for fun.

Fitting tips

Clean the piston grooves (a broken old ring makes a good scraper) without widening them.
Place each ring in the cylinder, pushed in square with the piston, and measure its end gap with a feeler gauge.
Open the rings just enough to slip them over the piston, by hand or with ring pliers: opened too far, they distort or break.
Mark facing up, gap correctly located on the pin in its groove: a badly placed ring breaks on the first turn.
Lightly oil the cylinder and the rings before reassembly, with a new top end gasket kit.

Why ATHENA?

Athena, an Italian company founded in 1973 near Vicenza, designs gaskets, pistons and cylinder kits for motorcycles. An OEM supplier to KTM, Ducati, Fantic, Piaggio and Triumph and a partner of the MXGP world championship, it develops its parts on the test bench and on the track with racing teams.

Spare parts and items to plan

Piston : PROX · WOSSNER
Top-end gasket kit : ATHENA M752007300094 · ATHENA M752010500094
Piston pin : WOSSNER WP033 · WOSSNER CW18
Piston pin clips : WISECO · VERTEX
Spark plug : NGK 3520 · NGK 6664

Frequently asked questions

Which diameter should I choose?
The nominal diameter of your piston, given in the title. The rings go on a piston of the same bore size.

Does the engine need breaking in?
Yes: one hour of gentle break-in, without sustained full throttle, so the rings bed in to the cylinder.

Compatibility

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

Reference S41316428

In stock5 Items

Specific References

Click on your bike to see all compatible parts.

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ATHENA Piston Ring Set Ø66.4 mm for KTM, HUSQVARNA, HUSABERG, GAS GAS and BETA 2005-2024

€21.90

Tax Included

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ATHENA Piston Ring Set Ø66.4 mm for KTM, HUSQVARNA, HUSABERG, GAS GAS and BETA 2005-2024

Specifications

When to replace it?

Fitting tips

Why ATHENA?

Spare parts and items to plan

Frequently asked questions

Compatibility

ATHENA Piston Ring Set Ø66.4 mm for KTM, HUSQVARNA, HUSABERG, GAS GAS and BETA 2005-2024