AFAM aluminium rear sprocket 42T, 520 pitch for YAMAHA TY 250 1986-1992

AFAM offers this rear sprocket for YAMAHA TY 250 1986-1992. 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 TY 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: 42
• Rear sprocket version: Standard
• Type: Rear sprocket
• Racing aluminium crown gear
• Manufacturer part number: 13311-42

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 : AFAM · JT SPROCKETS front sprocket 15 teeth,…
• Drive chain : see the selection
• Chain lube : LIQUI MOLY 400 ml · LIQUI MOLY 250 ml

Compatibility

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

Fits:
YAMAHA TY 250 1992
YAMAHA TY 250 1991
YAMAHA TY 250 1990
YAMAHA TY 250 1989
YAMAHA TY 250 1988
YAMAHA TY 250 1987
YAMAHA TY 250 1986