JT SPROCKETS steel rear sprocket 520 pitch for YAMAHA XT 250, YZ 100, YZ 125 1977-1987

JT SPROCKETS offers this rear sprocket for YAMAHA XT 250, YZ 100, YZ 125 1977-1987. 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 XT 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

• Color: Black
• Chain pitch: 520
• Material: Steel
• Rear sprocket version: Reinforced
• Type: Rear sprocket
• Ultra-durable high carbon C49 steel

Choose the number of teeth from the list: fewer teeth on the front sprocket (or more on the rear) gives more acceleration, the opposite gives a longer gearing.

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 : RFX · AFAM
• Drive chain : ALL BALLS 79-5008 · ALL BALLS 79-5007
• Chain lube : LIQUI MOLY 400 ml · SCOTTOILER

Compatibility

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

Fits:
YAMAHA XT 250 1987
YAMAHA XT 250 1986
YAMAHA XT 250 1985
YAMAHA XT 250 1984
YAMAHA XT 250 1983
YAMAHA XT 250 1982
YAMAHA XT 250 1981
YAMAHA YZ 100 1981
YAMAHA YZ 125 1979
YAMAHA YZ 125 1978
YAMAHA YZ 125 1977