JT SPROCKETS aluminium rear sprocket 520 pitch for YAMAHA IT 250, WR 250, YZ 125, YZ 250, YZ 490 1981-1998

JT SPROCKETS offers this rear sprocket for YAMAHA IT 250, WR 250, YZ 125, YZ 250, YZ 490 1981-1998. The rear sprocket receives the engine’s power through the chain and turns the rear wheel. Its number of teeth sets the gearing: with more teeth the bike accelerates harder but has a lower top speed; with fewer teeth it is the other way round.

Why fit a new rear sprocket?

The benefits:

• New teeth that hold the chain properly and make it last.
• The number of teeth is chosen to suit the terrain: more teeth for slow, tight sections, fewer for fast tracks.
• Aluminium or steel: aluminium is lighter, steel lasts much longer; “mud-release” models have cut-outs that clear the dirt.

When should you replace the rear sprocket on your YAMAHA YZ 250?

Pointed, hooked or uneven teeth, or a chain that lifts easily off the back of the sprocket: the chain kit needs replacing.

Specifications and fitting tips

• Chain pitch: 520
• Material: Aluminium
• Rear sprocket teeth count: 40
• Rear sprocket version: Standard
• Aviation-grade 7075-T6 aluminium alloy (Ergal) for lightweight competition sprocket
• Sprocket with "Anti-mud" finish which facilitates the projection of the particles, for a better transmission

Available in several colours.

Cross-Mania tip: Replace the rear sprocket, front sprocket and chain together, tighten the sprocket bolts in a cross pattern with threadlocker and set the chain slack to the manual.

Also needed with this part

• Front sprocket : PBR · AFAM
• Drive chain : ALL BALLS 79-5008 · ALL BALLS 79-5007
• Chain lube : LIQUI MOLY 400 ml · MUC OFF

Compatibility

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

Fits:
YAMAHA IT 250 1983
YAMAHA IT 250 1982
YAMAHA IT 250 1981
YAMAHA WR 125 1998
YAMAHA WR 250 1998
YAMAHA WR 250 1997
YAMAHA WR 250 1996
YAMAHA WR 250 1995
YAMAHA WR 250 1994
YAMAHA WR 250 1993
YAMAHA WR 250 1992
YAMAHA WR 250 1991
YAMAHA WR 250 1990
YAMAHA WR 250 1989
YAMAHA WRF 400 1998
YAMAHA YZ 125 1998
YAMAHA YZ 125 1997
YAMAHA YZ 125 1996
YAMAHA YZ 125 1995
YAMAHA YZ 125 1994
YAMAHA YZ 125 1993
YAMAHA YZ 125 1992
YAMAHA YZ 125 1991
YAMAHA YZ 125 1990
YAMAHA YZ 125 1989
YAMAHA YZ 125 1988
YAMAHA YZ 125 1987
YAMAHA YZ 125 1985
YAMAHA YZ 125 1984
YAMAHA YZ 250 1998
YAMAHA YZ 250 1997
YAMAHA YZ 250 1996
YAMAHA YZ 250 1995
YAMAHA YZ 250 1994
YAMAHA YZ 250 1993
YAMAHA YZ 250 1992
YAMAHA YZ 250 1991
YAMAHA YZ 250 1990
YAMAHA YZ 250 1989
YAMAHA YZ 250 1988
YAMAHA YZ 250 1987
YAMAHA YZ 250 1985
YAMAHA YZ 250 1984
YAMAHA YZ 250 1983
YAMAHA YZ 250 1982
YAMAHA YZ 250 1981
YAMAHA YZ 490 1988
YAMAHA YZ 490 1987
YAMAHA YZ 490 1986
YAMAHA YZ 490 1985
YAMAHA YZ 490 1984
YAMAHA YZ 490 1983
YAMAHA YZ 490 1982
YAMAHA YZF 400 1998