RFX steel front sprocket 428 pitch for YAMAHA DT 125, DT 125 RE, TDR 125, TZR 125, YZ 85 and MZ SM 125 1987-2027

RFX offers this front sprocket for YAMAHA DT 125, DT 125 RE, TDR 125, TZR 125, YZ 85 and MZ SM 125 1987-2027. The front sprocket sits on the gearbox output shaft and passes the engine’s power to the chain, which turns the rear sprocket and the rear wheel.

Why replace the front sprocket?

The benefits:

• An inexpensive part that protects a new chain and rear sprocket.
• Made of steel to withstand much heavier wear than the rear sprocket.
• Changing the number of teeth is the simplest, cheapest way to alter the gearing.

When should you replace the front sprocket?

Dished or hooked teeth: replace it straight away, otherwise it will ruin a new chain within hours.

Specifications and fitting tips

• Chain pitch: 428
• Material: Steel
• Front sprocket teeth count: 13
• Front sprocket version: Standard
• CNC Machined to extremely tight tolerances.
• Case Hardened and core refined Alloy steel that gives you the best strength and durability.

Available in several colours.

Cross-Mania tip: Replace the front sprocket together with the chain and rear sprocket, renew the sprocket nut or circlip and check the output shaft seal.

Also needed with this part

• Rear sprocket : RFX · AFAM
• Drive chain : RENTHAL 428 · AFAM
• 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:
MZ SM 125 2007
MZ SM 125 2006
MZ SM 125 2005
MZ SM 125 2004
MZ SM 125 2003
MZ SM 125 2002
YAMAHA DT 125 2004
YAMAHA DT 125 2003
YAMAHA DT 125 2002
YAMAHA DT 125 2001
YAMAHA DT 125 2000
YAMAHA DT 125 1999
YAMAHA DT 125 1998
YAMAHA DT 125 1997
YAMAHA DT 125 1996
YAMAHA DT 125 1995
YAMAHA DT 125 1994
YAMAHA DT 125 1993
YAMAHA DT 125 1992
YAMAHA DT 125 1991
YAMAHA DT 125 1990
YAMAHA DT 125 1989
YAMAHA DT 125 1988
YAMAHA DT 125 RE 2006
YAMAHA DT 125 RE 2005
YAMAHA DT 125 RE 2004
YAMAHA DT 125 RE 1998
YAMAHA DT 125 RE 1997
YAMAHA DT 125 RE 1996
YAMAHA DT 125 RE 1995
YAMAHA DT 125 RE 1994
YAMAHA DT 125 RE 1993
YAMAHA DT 125 RE 1992
YAMAHA DT 125 RE 1991
YAMAHA DT 125 RE 1990
YAMAHA DT 125 RE 1989
YAMAHA DT 125 X SM 2006
YAMAHA DT 125 X SM 2005
YAMAHA TDR 125 2002
YAMAHA TDR 125 2001
YAMAHA TDR 125 2000
YAMAHA TDR 125 1999
YAMAHA TDR 125 1998
YAMAHA TDR 125 1997
YAMAHA TDR 125 1996
YAMAHA TDR 125 1995
YAMAHA TDR 125 1994
YAMAHA TDR 125 1993
YAMAHA TDR 125 1992
YAMAHA TDR 125 1991
YAMAHA TDR 125 1990
YAMAHA TDR 125 1989
YAMAHA TZR 125 1997
YAMAHA TZR 125 1996
YAMAHA TZR 125 1995
YAMAHA TZR 125 1994
YAMAHA TZR 125 1993
YAMAHA XT 600 1989
YAMAHA XT 600 1988
YAMAHA XT 600 1987
YAMAHA XT 600 Z TENERE 1989
YAMAHA XT 600 Z TENERE 1988
YAMAHA XT 600 Z TENERE 1987
YAMAHA YZ 85 2027
YAMAHA YZ 85 2026
YAMAHA YZ 85 2025
YAMAHA YZ 85 2024
YAMAHA YZ 85 2023
YAMAHA YZ 85 2022
YAMAHA YZ 85 2021
YAMAHA YZ 85 2020
YAMAHA YZ 85 2019
YAMAHA YZ 85 2018
YAMAHA YZ 85 2017
YAMAHA YZ 85 2016
YAMAHA YZ 85 2015
YAMAHA YZ 85 2014
YAMAHA YZ 85 2013
YAMAHA YZ 85 2012
YAMAHA YZ 85 2011
YAMAHA YZ 85 2010
YAMAHA YZ 85 2009
YAMAHA YZ 85 2008
YAMAHA YZ 85 2007
YAMAHA YZ 85 2006
YAMAHA YZ 85 2005
YAMAHA YZ 85 2004
YAMAHA YZ 85 2003
YAMAHA YZ 85 2002