MOTO-MASTER Ultralight Steel Rear Sprocket for KAWASAKI KX 65 and SUZUKI RM 65 2000-2026

On KAWASAKI KX 65 and SUZUKI RM 65 from 2000 to 2026, the MOTO-MASTER steel rear sprocket fits in place of the original part. Bolted to the rear wheel, the sprocket takes all of the engine's force through the chain. Steel is the choice for durability: a steel sprocket sees off several chains where an aluminium one wears out, for a little more weight.

Specifications

• Brand: MOTO-MASTER
• Manufacturer part numbers: 620261144, 620261145, 620261146, 620261147, 620261148, 620261149, 620261150, 620261151
• Chain pitch: 420
• Material: steel
• Available versions: 44 Teeth: ref. 620261144; 45 Teeth: ref. 620261145; 46 Teeth: ref. 620261146; 47 Teeth: ref. 620261147; 48 Teeth: ref. 620261148; 49 Teeth: ref. 620261149; 50 Teeth: ref. 620261150; 51 Teeth: ref. 620261151
• Weight: 500 g
• Engine: 2-stroke

Choosing the right number of teeth

For the same bike, go for the number of teeth of your current sprocket (it's often stamped on it). More teeth on the rear sprocket shortens the gearing: more acceleration, lower top speed. Fewer teeth lengthens it. Even one or two teeth make a clear difference; if you change a lot, the chain length may need adjusting.

When to replace it?

• Teeth worn to a point or into a hook shape, worn down on one side only.
• Chain that lifts away from the sprocket when you pull it rearwards.
• Drivetrain noise, jerkiness or a chain that jumps under load.

Check the sprocket every time you service the chain. Always replace the rear sprocket, front sprocket and chain together: a new part running with worn ones wears out very quickly.

Fitting tips

1. Clean the hub and check that it isn't cracked or distorted.
2. Fit the sprocket the right way round (markings facing out) and tighten the bolts in a criss-cross pattern to the manufacturer's torque, with medium-strength threadlocker if the manual calls for it.
3. While you're at it, replace the front sprocket and the chain if they're worn.
4. Set the chain tension as per the manual, with the wheel aligned, then lube it with a suitable chain lube.
5. Recheck the bolt tightness and the chain tension after the first ride.

Why MOTO-MASTER?

Moto-Master is a Dutch brand founded in 1997 by Gaston Vernon that specialises in braking: discs, sintered pads and oversize kits. Its discs are designed in CAD and then laser-cut on CNC machines, with manufacturing in the Netherlands and ISO 9001:2015 certification.

Spare parts and items to plan

• Front sprocket : RENTHAL · AFAM
• Drive chain : AFAM A420R1-G · AFAM A420MX2-G
• Chain lube : LIQUI MOLY 400 ml · MUC OFF

Frequently asked questions

Aluminium or steel?
Aluminium is lighter and works well for motocross and racing. Steel lasts longer: it's the best choice for enduro, sandy terrain or if you put in a lot of hours.

Should the chain be replaced at the same time?
Yes, if it's worn: a stretched chain wears out a new sprocket in a few hours.

Compatibility

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

Fits:
KAWASAKI KX 65 2026
KAWASAKI KX 65 2025
KAWASAKI KX 65 2024
KAWASAKI KX 65 2023
KAWASAKI KX 65 2022
KAWASAKI KX 65 2021
KAWASAKI KX 65 2020
KAWASAKI KX 65 2019
KAWASAKI KX 65 2018
KAWASAKI KX 65 2017
KAWASAKI KX 65 2016
KAWASAKI KX 65 2015
KAWASAKI KX 65 2014
KAWASAKI KX 65 2013
KAWASAKI KX 65 2012
KAWASAKI KX 65 2011
KAWASAKI KX 65 2010
KAWASAKI KX 65 2009
KAWASAKI KX 65 2008
KAWASAKI KX 65 2007
KAWASAKI KX 65 2006
KAWASAKI KX 65 2005
KAWASAKI KX 65 2004
KAWASAKI KX 65 2003
KAWASAKI KX 65 2002
KAWASAKI KX 65 2001
KAWASAKI KX 65 2000
SUZUKI RM 65 2007
SUZUKI RM 65 2006
SUZUKI RM 65 2005
SUZUKI RM 65 2004
SUZUKI RM 65 2003