ATHENA Crankshaft Bearing and Seal Kit for YAMAHA YZ 125 and FANTIC XE 125, XX 125 2005-2026

The ATHENA P400485444118 crankshaft bearing and seal kit is designed for FANTIC XE 125, XX 125 and YAMAHA YZ 125 from 2005 to 2026. The crankshaft bearings carry the engine's entire rotation. Over the hours they develop play: the crankshaft vibrates, wears its oil seals and can end up touching the crankcase. This kit brings together the crankshaft bearings and oil seals that are replaced together.

Specifications

• Brand: ATHENA
• Manufacturer part number: P400485444118
• EAN code: 8051764546305
• Weight: 400 g
• Engine: 2-stroke

When to replace it?

• Rumbling that changes with the revs, unusual vibration.
• Radial or side play in the crankshaft.
• Leak at the crankshaft oil seals.

Every time the connecting rod or crankshaft is replaced, and at the intervals in the service manual.

Fitting tips

1. Heat the crankcase halves (around 100 to 120 °C) to remove and fit the bearings without force; put the new bearings in the freezer to help them go in.
2. Never hit the outer race of a bearing mounted on the shaft, or the inner race of a bearing mounted in the crankcase.
3. Fit the oil seals perfectly square, with greased lips.
4. Close up with a complete engine gasket kit and check that the crankshaft turns freely.
5. Take the opportunity to check the gearbox bearings and refill with fresh oil.

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

• Complete engine gasket kit : MOOSE 808641MSE · MOOSE 811641MSE
• Gearbox bearings : HOT RODS TBK0064 · HOT RODS TBK0063
• Connecting rod kit : WISECO 125 L · WOSSNER
• Gearbox oil : LIQUI MOLY 10W30 1 L · LIQUI MOLY 1 L

Frequently asked questions

Are the oil seals included?
Yes: the kit contains the crankshaft bearings and oil seals.

What should I replace at the same time?
The complete engine gasket kit and, if the engine has some hours on it, the connecting rod.

Compatibility

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

Fits:
FANTIC XE 125 2026
FANTIC XE 125 2025
FANTIC XE 125 2024
FANTIC XE 125 2023
FANTIC XE 125 2022
FANTIC XE 125 2021
FANTIC XX 125 2026
FANTIC XX 125 2025
FANTIC XX 125 2024
FANTIC XX 125 2023
FANTIC XX 125 2022
FANTIC XX 125 2021
YAMAHA YZ 125 2026
YAMAHA YZ 125 2025
YAMAHA YZ 125 2024
YAMAHA YZ 125 2023
YAMAHA YZ 125 2022
YAMAHA YZ 125 2021
YAMAHA YZ 125 2020
YAMAHA YZ 125 2019
YAMAHA YZ 125 2018
YAMAHA YZ 125 2017
YAMAHA YZ 125 2016
YAMAHA YZ 125 2015
YAMAHA YZ 125 2014
YAMAHA YZ 125 2013
YAMAHA YZ 125 2012
YAMAHA YZ 125 2011
YAMAHA YZ 125 2010
YAMAHA YZ 125 2009
YAMAHA YZ 125 2008
YAMAHA YZ 125 2007
YAMAHA YZ 125 2006
YAMAHA YZ 125 2005