ATHENA Engine Oil Seal Kit for YAMAHA YFM 250 2005-2008

The ATHENA P400485400075 engine oil seal kit is designed for YAMAHA YFM 250 from 2005 to 2008. Oil seals (or lip seals) seal around the shafts that come out of the engine: crankshaft, countershaft, gear shift shaft, kick-start or water pump. On a two-stroke, the crankshaft seals also keep the bottom end airtight, which it needs in order to run.

Specifications

• Brand: ATHENA
• Manufacturer part number: P400485400075
• EAN code: 8051764546169
• Weight: 100 g
• Engine: 4-stroke

When to replace it?

• Oil around the countershaft sprocket, the gear shift shaft or the kick-start.
• Lip hardened or split, or shaft marked where the seal runs.

Every time the crankcases are split, and as soon as a leak appears.

Fitting tips

1. Drive out the old seal without scratching its housing.
2. Lightly grease the lip and the housing.
3. Press the seal in perfectly square with a tube or socket of the same diameter, lip facing the oil side.
4. Protect the lip from the splines or keyways as you slide the shaft through (adhesive tape).

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

• Crankshaft bearings and seals : see the selection
• Complete engine gasket kit : see the selection
• Gearbox oil : LIQUI MOLY 10W30 1 L · LIQUI MOLY 80W 500 ml

Frequently asked questions

Which seals are included?
The engine's oil seals, depending on the model: crankshaft, countershaft, gear shift shaft, kick-start or water pump. If in doubt, compare with your original parts.

Cases split: what else should I replace?
The crankshaft bearings and a complete engine gasket kit.

Compatibility

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

Fits:
YAMAHA YFM 250 2008
YAMAHA YFM 250 2007
YAMAHA YFM 250 2006
YAMAHA YFM 250 2005