RFX steel front sprocket 13T, 520 pitch for TM RACING MX 250, MXF 450 2001-2022

RFX offers this front sprocket for TM RACING MX 250, MXF 450 2001-2022. 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 on your TM RACING MX 250?

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
• CNC Machined to extremely tight tolerances.
• Case Hardened and core refined Alloy steel that gives you the best strength and durability.
• Manufacturer part number: FXFS 81-13 55ST

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 FXRS 80 · RFX FXRS 80
• Drive chain : ALL BALLS 79-5001 · ALL BALLS 79-5008
• 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:
TM RACING MX 250 2022
TM RACING MX 250 2021
TM RACING MX 250 2020
TM RACING MX 250 2019
TM RACING MX 250 2018
TM RACING MX 250 2017
TM RACING MX 250 2016
TM RACING MX 250 2015
TM RACING MX 250 2014
TM RACING MX 250 2013
TM RACING MX 250 2012
TM RACING MX 250 2011
TM RACING MX 250 2010
TM RACING MX 250 2009
TM RACING MX 250 2008
TM RACING MX 250 2007
TM RACING MX 250 2006
TM RACING MX 250 2005
TM RACING MX 250 2004
TM RACING MX 250 2003
TM RACING MX 250 2002
TM RACING MX 250 2001
TM RACING MXF 450 2016
TM RACING MXF 450 2015
TM RACING MXF 450 2014
TM RACING MXF 450 2013
TM RACING MXF 450 2012
TM RACING MXF 450 2011
TM RACING MXF 450 2010
TM RACING MXF 450 2009
TM RACING MXF 450 2008
TM RACING MXF 450 2007
TM RACING MXF 450 2006
TM RACING MXF 450 2005
TM RACING MXF 450 2004
TM RACING MXF 450 2003