AFAM aluminium rear sprocket 520 pitch for KTM GS 125, GS 250, GS 300, MX 125, MX 500 and MAICO GS 250 1984-1994

AFAM offers this rear sprocket for KTM GS 125, GS 250, GS 300, MX 125, MX 500 and MAICO GS 250 1984-1994. 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?

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 version: Standard
• Type: Rear sprocket
• Racing aluminium crown gear
• Ultra-light with hard anodization

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 : AFAM · PBR
• Drive chain : AFAM · RENTHAL
• 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:
KTM GS 125 1990
KTM GS 125 1989
KTM GS 125 1988
KTM GS 125 1987
KTM GS 125 1985
KTM GS 125 1984
KTM GS 250 1989
KTM GS 250 1988
KTM GS 250 1987
KTM GS 250 1986
KTM GS 250 1985
KTM GS 250 1984
KTM GS 300 1986
KTM GS 300 1985
KTM GS 350 1988
KTM GS 350 1987
KTM GS 600 1984
KTM MX 125 1990
KTM MX 125 1989
KTM MX 125 1988
KTM MX 125 1987
KTM MX 125 1985
KTM MX 125 1984
KTM MX 250 1989
KTM MX 250 1988
KTM MX 500 1994
KTM MX 500 1993
KTM MX 500 1992
KTM MX 500 1991
KTM MX 500 1990
KTM MX 500 1989
KTM MX 500 1988
KTM MX 500 1987
KTM MX 500 1986
KTM MX 500 1985
KTM MX 600 1989
KTM MX 600 1988
MAICO GS 250 1985
MAICO GS 250 1984