EK/JT Chain Kit 520SRX2 14/48 - Ultra-Light Rear Sprocket for BETA RR 125 2T X-PRO, RR 300, RR 300 2T RACE, RR 300 2T X-PRO

EK CHAIN offers this chain and sprocket kit for BETA RR 125 2T X-PRO, RR 200 2T X-PRO, RR 300, RR 300 2T RACE, RR 300 2T X-PRO 2020-2027. 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: Self-cleaning
• Rear sprocket version: Standard
• Use: On/Off-Road
• Connecting link: Pin rivet
• EK Chain Type: SRX2
• Manufacturer part number: 3034926

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:
BETA RR 125 2T X-PRO 2027
BETA RR 200 2T X-PRO 2027
BETA RR 250 2T X-PRO 2027
BETA RR 300 2024
BETA RR 300 2023
BETA RR 300 2022
BETA RR 300 2021
BETA RR 300 2020
BETA RR 300 2T RACE 2027
BETA RR 300 2T RACE 2026
BETA RR 300 2T RACE 2025
BETA RR 300 2T X-PRO 2027
BETA RR 300 2T X-PRO 2026
BETA RR 300 2T X-PRO 2025
BETA RR 350 4T X-PRO 2027
BETA RR 390 4T X-PRO 2027
BETA RR 430 4T X-PRO 2027
BETA RR 480 4T X-PRO 2027