ATHENA Crankshaft Bearing for YAMAHA WR 250, WRF 250, YZF 250, GAS GAS ECF 250, ECF 300 and FANTIC XEF 250, XXF 250 2001-2024

The ATHENA MS300640160YSK crankshaft bearing is designed for YAMAHA WR 250, WRF 250, YZF 250, GAS GAS ECF 250, ECF 300 and FANTIC XEF 250, XXF 250 from 2001 to 2024. The crankshaft bearing carries the engine's rotation on every turn. Once worn, it develops play: the crankshaft vibrates, wears its oil seals and can end up damaging the crankcase.

Specifications

• Brand: ATHENA
• Manufacturer part number: MS300640160YSK
• EAN code: 4549250207280
• Weight: 200 g
• Engine: 4-stroke

When to replace it?

• Rumbling that changes with the revs.
• Radial or side play in the crankshaft.
• Tight spot or noise when turning the bearing by hand.

During a bottom end rebuild: always replace both crankshaft bearings together.

Fitting tips

1. Heat the crankcase half (around 100 to 120 °C) to remove the old bearing and fit the new one without force.
2. Put the new bearing in the freezer before fitting: it will go in more easily.
3. Replace the crankshaft oil seals at the same time.
4. Close up with a complete engine 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

• Engine oil seals : MOOSE · PROX
• Complete engine gasket kit : CENTAURO · ATHENA
• Gearbox bearings : HOT RODS TBK0066 · HOT RODS HR00162

Frequently asked questions

Do both bearings need replacing?
Yes: they have done the same number of hours and wear together.

Compatibility

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

Fits:
FANTIC XEF 250 2024
FANTIC XEF 250 2023
FANTIC XEF 250 2022
FANTIC XEF 250 2021
FANTIC XXF 250 2024
FANTIC XXF 250 2023
FANTIC XXF 250 2022
GAS GAS ECF 250 2015
GAS GAS ECF 250 2014
GAS GAS ECF 250 2013
GAS GAS ECF 250 2012
GAS GAS ECF 250 2011
GAS GAS ECF 250 2010
GAS GAS ECF 300 2015
GAS GAS ECF 300 2014
GAS GAS ECF 300 2013
YAMAHA WR 250 2020
YAMAHA WR 250 2019
YAMAHA WR 250 2018
YAMAHA WR 250 2017
YAMAHA WR 250 2016
YAMAHA WR 250 2015
YAMAHA WR 250 2014
YAMAHA WR 250 2013
YAMAHA WR 250 2012
YAMAHA WR 250 2011
YAMAHA WR 250 2010
YAMAHA WR 250 2009
YAMAHA WR 250 2008
YAMAHA WRF 250 2024
YAMAHA WRF 250 2023
YAMAHA WRF 250 2022
YAMAHA WRF 250 2021
YAMAHA WRF 250 2020
YAMAHA WRF 250 2019
YAMAHA WRF 250 2018
YAMAHA WRF 250 2017
YAMAHA WRF 250 2016
YAMAHA WRF 250 2015
YAMAHA WRF 250 2014
YAMAHA WRF 250 2013
YAMAHA WRF 250 2012
YAMAHA WRF 250 2011
YAMAHA WRF 250 2010
YAMAHA WRF 250 2009
YAMAHA WRF 250 2008
YAMAHA WRF 250 2007
YAMAHA WRF 250 2006
YAMAHA WRF 250 2005
YAMAHA WRF 250 2004
YAMAHA WRF 250 2003
YAMAHA WRF 250 2002
YAMAHA WRF 250 2001
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
YAMAHA YZF 250 2015
YAMAHA YZF 250 2014
YAMAHA YZF 250 2013
YAMAHA YZF 250 2012
YAMAHA YZF 250 2011
YAMAHA YZF 250 2010
YAMAHA YZF 250 2009
YAMAHA YZF 250 2008
YAMAHA YZF 250 2007
YAMAHA YZF 250 2006
YAMAHA YZF 250 2005
YAMAHA YZF 250 2004
YAMAHA YZF 250 2003
YAMAHA YZF 250 2002
YAMAHA YZF 250 2001