RENTHAL steel front sprocket 13T, 520 pitch for YAMAHA WR 125, WR 200, YZ 125 and GAS GAS EC 125 1987-2015

RENTHAL offers this front sprocket for YAMAHA WR 125, WR 200, YZ 125 and GAS GAS EC 125 1987-2015. 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: 520
• Material: Steel
• Front sprocket teeth count: 13
• Front sprocket version: Standard
• Standard version
• Made from a nickel-chrome-molybdenum alloy: greater strength
• Manufacturer part number: 257--520-13P

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 : AFAM 13323+ · AFAM 13323N
• Drive chain : RENTHAL · RENTHAL 520
• 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:
GAS GAS EC 125 2015
GAS GAS EC 125 2014
GAS GAS EC 125 2013
GAS GAS EC 125 2012
GAS GAS EC 125 2011
GAS GAS EC 125 2010
GAS GAS EC 125 2009
GAS GAS EC 125 2008
GAS GAS EC 125 2007
GAS GAS EC 125 2006
GAS GAS EC 125 2005
GAS GAS EC 125 2004
GAS GAS EC 125 2003
GAS GAS EC 125 2002
GAS GAS EC 125 2001
YAMAHA WR 125 2003
YAMAHA WR 125 2002
YAMAHA WR 125 2001
YAMAHA WR 125 2000
YAMAHA WR 125 1999
YAMAHA WR 200 1996
YAMAHA WR 200 1995
YAMAHA WR 200 1994
YAMAHA WR 200 1993
YAMAHA WR 200 1992
YAMAHA YZ 125 2004
YAMAHA YZ 125 2003
YAMAHA YZ 125 2002
YAMAHA YZ 125 2001
YAMAHA YZ 125 2000
YAMAHA YZ 125 1999
YAMAHA YZ 125 1998
YAMAHA YZ 125 1997
YAMAHA YZ 125 1996
YAMAHA YZ 125 1995
YAMAHA YZ 125 1994
YAMAHA YZ 125 1993
YAMAHA YZ 125 1992
YAMAHA YZ 125 1991
YAMAHA YZ 125 1990
YAMAHA YZ 125 1989
YAMAHA YZ 125 1988
YAMAHA YZ 125 1987