AFAM Chain Kit 520XRR3 13/52 Reinforced - Standard Rear Sprocket for KTM EXC 450, EXCF 350, EXCF 450 and GAS GAS EC 250, ECF 350

AFAM offers this chain and sprocket kit for KTM EXC 250, EXC 450, EXCF 250, EXCF 350, EXCF 450 and GAS GAS EC 250, ECF 350 2006-2024. The front sprocket, on the gearbox output, drives the chain, which turns the rear sprocket bolted to the rear wheel.

Why replace the whole kit?

The benefits:

• A worn chain damages the teeth and worn teeth damage the chain: replacing all three parts together avoids ruining a new part within a few rides.
• Pitch, tooth counts and chain length are already matched: one order for the whole final drive.
• You can adapt the gearing: more teeth on the rear sprocket (or fewer on the front) gives more acceleration but less top speed; fewer teeth on the rear does the opposite.

When should you replace this part?

Hooked or pointed teeth, a chain that lifts off the back of the rear sprocket when pulled, tight spots or slack that needs adjusting every ride: the kit is worn out.

Specifications and fitting tips

• Front sprocket version: Standard
• Rear sprocket version: Reinforced
• Use: Off-Road
• Connecting link: Split link
• Rear Sprocket Material: Steel
• Standard Steel Front Sprocket: Precision-engineered, durable, and perfectly matched to the chain.
• Manufacturer part number: 485384

Cross-Mania tip: Align the rear wheel (same marks on both sides), tighten the rear sprocket bolts to the specified torque with threadlocker, set the slack to the manual and recheck it after the first ride.

Compatibility

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

Fits:
GAS GAS EC 250 2022
GAS GAS EC 250 2021
GAS GAS ECF 350 2024
GAS GAS ECF 350 2023
GAS GAS ECF 350 2022
GAS GAS ECF 350 2021
KTM EXC 250 2023
KTM EXC 250 2022
KTM EXC 250 2021
KTM EXC 400 2011
KTM EXC 400 2010
KTM EXC 400 2009
KTM EXC 450 2016
KTM EXC 450 2015
KTM EXC 450 2014
KTM EXC 450 2013
KTM EXC 450 2012
KTM EXC 450 2011
KTM EXC 450 2010
KTM EXC 450 2009
KTM EXCF 250 2009
KTM EXCF 250 2008
KTM EXCF 250 2007
KTM EXCF 250 2006
KTM EXCF 350 2022
KTM EXCF 350 2021
KTM EXCF 350 2020
KTM EXCF 350 2019
KTM EXCF 350 2018
KTM EXCF 350 2017
KTM EXCF 350 2016
KTM EXCF 350 2015
KTM EXCF 350 2014
KTM EXCF 350 2013
KTM EXCF 350 2012
KTM EXCF 450 2023
KTM EXCF 450 2022
KTM EXCF 450 2021
KTM EXCF 450 2020
KTM EXCF 450 2019
KTM EXCF 450 2018
KTM EXCF 450 2017