ATHENA Clutch Friction Plate Kit + cover gasket for YAMAHA YZ 250, YZF 450 1999-2022

The ATHENA P40230074 clutch friction plate kit is designed for YAMAHA YZ 250, YZF 450 from 1999 to 2022. The friction plates transmit engine torque to the gearbox by gripping against the steel plates. As they wear, they get thinner: the clutch slips, overheats and the bike loses traction.

Specifications

• Brand: ATHENA
• Manufacturer part number: P40230074
• EAN code: 8052780272742
• Weight: 350 g

When to replace it?

• Revs rise but the bike doesn't pick up speed (slipping), especially in the higher gears.
• Engagement point that wanders, clutch that judders or smells burnt.
• Plates below the minimum thickness given in the manual.

Measure plate thickness with a vernier caliper at every clutch check and replace the plates once they're below the minimum in the manual, or as soon as they slip.

Fitting tips

1. Soak the new friction plates in gearbox oil before fitting them.
2. Check the steel plates (flatness, blueing) and the clutch springs; replace them if necessary.
3. Make sure the basket fingers aren't notched: if they are, the clutch will snag.
4. Reassemble in the original order, tighten to the manufacturer's torque and close up with a new clutch cover gasket.

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

• Clutch steel plates : ATHENA · REKLUSE
• Clutch springs : HINSON · BIHR
• Clutch cover gasket : BOYESEN · ATHENA
• Gearbox oil : LIQUI MOLY 10W30 1 L · LIQUI MOLY 80W 500 ml

Frequently asked questions

Should the steel plates be replaced at the same time?
If they're blued, warped or marked, yes: fit new steel plates. If not, check them and keep them.

Is the cover gasket included?
Yes: this kit includes the clutch cover gasket.

Compatibility

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

Fits:
YAMAHA YZ 250 2022
YAMAHA YZ 250 2021
YAMAHA YZ 250 2020
YAMAHA YZ 250 2019
YAMAHA YZ 250 2018
YAMAHA YZ 250 2017
YAMAHA YZ 250 2016
YAMAHA YZ 250 2015
YAMAHA YZ 250 2014
YAMAHA YZ 250 2013
YAMAHA YZ 250 2012
YAMAHA YZ 250 2011
YAMAHA YZ 250 2010
YAMAHA YZ 250 2009
YAMAHA YZ 250 2008
YAMAHA YZ 250 2007
YAMAHA YZ 250 2006
YAMAHA YZ 250 2005
YAMAHA YZ 250 2004
YAMAHA YZ 250 2003
YAMAHA YZ 250 2002
YAMAHA YZ 250 2001
YAMAHA YZ 250 2000
YAMAHA YZ 250 1999
YAMAHA YZF 450 2010