ATHENA Needle Bearing for YAMAHA YZ 80, YZ 85 1993-2027

The ATHENA MNB140180165 small-end needle bearing is designed for YAMAHA YZ 80, YZ 85 from 1993 to 2027. The small-end needle bearing lets the piston pin turn inside the connecting rod on fine steel needles. On a two-stroke, it is lubricated only by the premix: it wears quickly and, if it breaks, it destroys the piston and the cylinder.

Specifications

• Brand: ATHENA
• Manufacturer part number: MNB140180165
• EAN code: 8050043263032
• Dimensions: 14x18x16.5 mm
• Weight: 10 g
• Engine: 2-stroke

When to replace it?

• Play between the piston pin and the connecting rod.
• Needles blued or marked, or cage damaged.
• Metallic knocking from the top end.

At every piston change on a two-stroke, and as soon as play appears.

Fitting tips

1. Check the small-end bore and the piston pin: if they are marked, replace them.
2. Oil the bearing before fitting it.
3. Fit the pin and new circlips, gap opposite the notch in the piston.
4. Reassemble the top end with a new top end 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

• Piston : WISECO WRE915M05250 · WISECO W805M04
• Piston pin : WISECO · WOSSNER
• Piston pin clips : WISECO 125 L · WOSSNER
• Top-end gasket kit : ATHENA M752005600094 · ATHENA M752008300094

Frequently asked questions

Which bearing should I choose?
The one that matches your engine's dimensions (inner diameter x outer diameter x width), given in the specifications.

Compatibility

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

Fits:
YAMAHA YZ 80 2001
YAMAHA YZ 80 2000
YAMAHA YZ 80 1999
YAMAHA YZ 80 1998
YAMAHA YZ 80 1997
YAMAHA YZ 80 1996
YAMAHA YZ 80 1995
YAMAHA YZ 80 1994
YAMAHA YZ 80 1993
YAMAHA YZ 85 2027
YAMAHA YZ 85 2026
YAMAHA YZ 85 2025
YAMAHA YZ 85 2024
YAMAHA YZ 85 2023
YAMAHA YZ 85 2022
YAMAHA YZ 85 2021
YAMAHA YZ 85 2020
YAMAHA YZ 85 2019
YAMAHA YZ 85 2018
YAMAHA YZ 85 2017
YAMAHA YZ 85 2016
YAMAHA YZ 85 2015
YAMAHA YZ 85 2014
YAMAHA YZ 85 2013
YAMAHA YZ 85 2012
YAMAHA YZ 85 2011
YAMAHA YZ 85 2010
YAMAHA YZ 85 2009
YAMAHA YZ 85 2008
YAMAHA YZ 85 2007
YAMAHA YZ 85 2006
YAMAHA YZ 85 2005
YAMAHA YZ 85 2004
YAMAHA YZ 85 2003
YAMAHA YZ 85 2002