AFAM Chain Kit 520MX6 14/49-116 - Standard Rear Sprocket for GAS GAS MC 250, KTM SX 300 and HUSQVARNA TC 250 2021-2027

AFAM offers this chain and sprocket kit for GAS GAS EX 300, MC 250, MC 300, KTM SX 250, SX 300 and HUSQVARNA TC 250, TX 300 2021-2027. 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: Standard
• Connecting link: Split link
• AFAM chain type: MX6
• Rear Sprocket Material: Aluminium
• 520 pitch chain
• Manufacturer part number: 3070992

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 EX 300 2027
GAS GAS EX 300 2026
GAS GAS EX 300 2025
GAS GAS EX 300 2024
GAS GAS MC 250 2026
GAS GAS MC 250 2025
GAS GAS MC 250 2024
GAS GAS MC 250 2023
GAS GAS MC 250 2022
GAS GAS MC 300 2025
HUSQVARNA TC 250 2023
HUSQVARNA TC 250 2022
HUSQVARNA TC 250 2021
HUSQVARNA TX 300 2024
KTM SX 250 2023
KTM SX 250 2022
KTM SX 250 2021
KTM SX 300 2027
KTM SX 300 2026
KTM SX 300 2025
KTM SX 300 2024