AFAM steel rear sprocket 428 pitch for YAMAHA DT 125, DT 125 MX, XTZ 125, YTM 200 1978-2006

AFAM offers this rear sprocket for YAMAHA DT 125, DT 125 MX, XTZ 125, YTM 200 1978-2006. 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 DT 125 MX?

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: 428
• Material: Steel
• Rear sprocket version: Reinforced
• Type: Rear sprocket
• Steel rear sprocket
• Top of range manufacturing and quality

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 : PBR · AFAM
• Drive chain : AFAM A428R1-G 138L · AFAM A428MX-G 1
• Chain lube : LIQUI MOLY 400 ml · MUC OFF 400 ml

Compatibility

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

Fits:
YAMAHA DT 125 1988
YAMAHA DT 125 1987
YAMAHA DT 125 1986
YAMAHA DT 125 1985
YAMAHA DT 125 1984
YAMAHA DT 125 1983
YAMAHA DT 125 1982
YAMAHA DT 125 MX 1991
YAMAHA DT 125 MX 1990
YAMAHA DT 125 MX 1989
YAMAHA DT 125 MX 1988
YAMAHA DT 125 MX 1987
YAMAHA DT 125 MX 1986
YAMAHA DT 125 MX 1985
YAMAHA DT 125 MX 1984
YAMAHA DT 125 MX 1983
YAMAHA DT 125 MX 1982
YAMAHA DT 125 MX 1981
YAMAHA DT 125 MX 1980
YAMAHA DT 125 MX 1979
YAMAHA DT 125 MX 1978
YAMAHA XTZ 125 2006
YAMAHA XTZ 125 2005
YAMAHA XTZ 125 2004
YAMAHA YTM 200 1991
YAMAHA YTM 200 1990
YAMAHA YTM 200 1989
YAMAHA YTM 200 1988
YAMAHA YTM 200 1987
YAMAHA YTM 200 1986
YAMAHA YTM 200 1985