ATHENA Piston Pin Circlips for YAMAHA WRF 250, YZF 250 and FANTIC XEF 250, XXF 250 2016-2024

The ATHENA P40325004 set of piston pin circlips is designed for YAMAHA WRF 250, YZF 250 and FANTIC XEF 250, XXF 250 from 2016 to 2024. Piston pin circlips hold the pin in place inside the piston. If one comes out of its groove, the pin scores the cylinder and the engine is wrecked. These small parts cost next to nothing but must never be reused.

Specifications

• Brand: ATHENA
• Manufacturer part number: P40325004
• EAN code: 8053300712359
• For ATHENA piston
• Engine: 4-stroke

When to replace it?

• Circlip distorted, opened up or marked on teardown.
• Circlip already removed once: it has lost its tension.
• Wear marks in the piston groove.

Every time the piston pin is removed: a circlip that has been taken out is always replaced with a new one.

Fitting tips

1. Check that the circlip size matches your piston pin (see specifications).
2. Plug the crankcase opening with a rag before fitting the circlips: one dropped into the engine means a full strip-down.
3. Fit each circlip without distorting it, gap opposite the notch in the piston, and check it sits all the way round its groove.

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

• Top-end gasket kit : CENTAURO · MOOSE

Frequently asked questions

How many circlips do I need?
Two per piston, one on each side of the pin. Check the quantity stated for the part number.

Can I reuse the old circlips?
No: a circlip that has been removed loses its tension and may come out of its groove. Always fit new ones.

Compatibility

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

Fits:
FANTIC XEF 250 2023
FANTIC XEF 250 2022
FANTIC XEF 250 2021
FANTIC XXF 250 2023
FANTIC XXF 250 2022
FANTIC XXF 250 2021
YAMAHA WRF 250 2024
YAMAHA WRF 250 2023
YAMAHA WRF 250 2022
YAMAHA WRF 250 2021
YAMAHA WRF 250 2020
YAMAHA YZF 250 2024
YAMAHA YZF 250 2023
YAMAHA YZF 250 2022
YAMAHA YZF 250 2021
YAMAHA YZF 250 2020
YAMAHA YZF 250 2019
YAMAHA YZF 250 2018
YAMAHA YZF 250 2017
YAMAHA YZF 250 2016