MOTO-MASTER 7075 Aluminium Rear Sprocket (blue) for GAS GAS, BETA, SHERCO, TRS and SCORPA 2002-2026

The MOTO-MASTER 7075 (bleue) aluminium rear sprocket is designed for GAS GAS TXT 125, TXT 200, TXT 250, TXT 280, TXT 300, BETA EVO 125, EVO 200, EVO 250, EVO 300, TRS ONE 125, ONE 250, ONE 280, ONE 300, SHERCO ST 125, ST 250, ST 300 and SCORPA SC 125, SC 250, SC 300 from 2002 to 2026. The rear sprocket is the large sprocket bolted to the rear wheel hub: together with the front sprocket and the chain, it transmits the engine's power to the wheel. Made of aluminium, it weighs much less than a steel sprocket, which cuts unsprung weight and makes the bike feel livelier.

Specifications

• Brand: MOTO-MASTER
• Manufacturer part numbers: 620212440, 620212441, 620212442, 620212443, 620212444, 620212445, 620212446, 620212447, 620212448, 620212449, 620212450
• Chain pitch: 520
• Material: 7075 aluminium (Ergal)
• Available versions: 40 Teeth: ref. 620212440; 41 Teeth: ref. 620212441; 42 Teeth: ref. 620212442; 43 Teeth: ref. 620212443; 44 Teeth: ref. 620212444; 45 Teeth: ref. 620212445; 46 Teeth: ref. 620212446; 47 Teeth: ref. 620212447; 48 Teeth: ref. 620212448; 49 Teeth: ref. 620212449; 50 Teeth: ref. 620212450
• Weight: 400 g

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. Aluminium wears faster than steel, especially in sand and mud.

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?

In motocross, Moto-Master was working with the Red Bull KTM Factory Racing team as early as 2010, and it backed the MXGP world championship in 2015. On the technical side, the Flame profile of its discs is designed to improve cooling and go easy on the pads, and its Racing GP sintered pads use a backing plate with hooks (NRS technology) that stops the friction material from coming away.

Spare parts and items to plan

• Front sprocket : RENTHAL · AFAM
• Drive chain : AFAM A520MR2-G 1 · AFAM A520XRR3-G
• Chain lube : LIQUI MOLY 400 ml · SCOTTOILER

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:
BETA EVO 125 2026
BETA EVO 125 2025
BETA EVO 125 2024
BETA EVO 125 2023
BETA EVO 125 2022
BETA EVO 125 2021
BETA EVO 125 2020
BETA EVO 125 2019
BETA EVO 125 2018
BETA EVO 125 2017
BETA EVO 125 2016
BETA EVO 125 2015
BETA EVO 125 2014
BETA EVO 125 2013
BETA EVO 125 2012
BETA EVO 125 2011
BETA EVO 125 2010
BETA EVO 125 2009
BETA EVO 200 2026
BETA EVO 200 2025
BETA EVO 200 2024
BETA EVO 200 2023
BETA EVO 200 2022
BETA EVO 200 2021
BETA EVO 200 2020
BETA EVO 200 2019
BETA EVO 200 2018
BETA EVO 200 2017
BETA EVO 200 2016
BETA EVO 200 2015
BETA EVO 200 2014
BETA EVO 200 2013
BETA EVO 200 2012
BETA EVO 200 2011
BETA EVO 200 2010
BETA EVO 200 2009
BETA EVO 250 2026
BETA EVO 250 2025
BETA EVO 250 2024
BETA EVO 250 2023
BETA EVO 250 2022
BETA EVO 250 2021
BETA EVO 250 2020
BETA EVO 250 2019
BETA EVO 250 2018
BETA EVO 250 2017
BETA EVO 250 2016
BETA EVO 250 2015
BETA EVO 250 2014
BETA EVO 250 2013
BETA EVO 250 2012
BETA EVO 250 2011
BETA EVO 250 2010
BETA EVO 250 2009
BETA EVO 300 2026
BETA EVO 300 2025
BETA EVO 300 2024
BETA EVO 300 2023
BETA EVO 300 2022
BETA EVO 300 2021
BETA EVO 300 2020
BETA EVO 300 2019
BETA EVO 300 2018
BETA EVO 300 2017
BETA EVO 300 2016
BETA EVO 300 2015
BETA EVO 300 2014
BETA EVO 300 2013
BETA EVO 300 2012
BETA EVO 300 2011
BETA EVO 300 2010
BETA EVO 300 2009
GAS GAS TXT 125 2026
GAS GAS TXT 125 2025
GAS GAS TXT 125 2024
GAS GAS TXT 125 2023
GAS GAS TXT 125 2022
GAS GAS TXT 125 2021
GAS GAS TXT 125 2020
GAS GAS TXT 125 2019
GAS GAS TXT 125 2018
GAS GAS TXT 125 2017
GAS GAS TXT 125 2016
GAS GAS TXT 125 2015
GAS GAS TXT 125 2014
GAS GAS TXT 125 2013
GAS GAS TXT 125 2012
GAS GAS TXT 125 2011
GAS GAS TXT 125 2010
GAS GAS TXT 125 2009
GAS GAS TXT 125 2008
GAS GAS TXT 125 2007
GAS GAS TXT 125 2006
GAS GAS TXT 125 2005
GAS GAS TXT 125 2004
GAS GAS TXT 200 2020
GAS GAS TXT 200 2019
GAS GAS TXT 200 2018
GAS GAS TXT 200 2017
GAS GAS TXT 200 2016
GAS GAS TXT 200 2015
GAS GAS TXT 200 2014
GAS GAS TXT 200 2013
GAS GAS TXT 200 2012
GAS GAS TXT 200 2011
GAS GAS TXT 200 2010
GAS GAS TXT 200 2009
GAS GAS TXT 200 2008
GAS GAS TXT 200 2007
GAS GAS TXT 200 2006
GAS GAS TXT 200 2005
GAS GAS TXT 200 2004
GAS GAS TXT 250 2026
GAS GAS TXT 250 2025
GAS GAS TXT 250 2024
GAS GAS TXT 250 2023
GAS GAS TXT 250 2022
GAS GAS TXT 250 2021
GAS GAS TXT 250 2020
GAS GAS TXT 250 2019
GAS GAS TXT 250 2018
GAS GAS TXT 250 2017
GAS GAS TXT 250 2016
GAS GAS TXT 250 2015
GAS GAS TXT 250 2014
GAS GAS TXT 250 2013
GAS GAS TXT 250 2012
GAS GAS TXT 250 2011
GAS GAS TXT 250 2010
GAS GAS TXT 250 2009
GAS GAS TXT 250 2008
GAS GAS TXT 250 2007
GAS GAS TXT 250 2006
GAS GAS TXT 250 2005
GAS GAS TXT 250 2004
GAS GAS TXT 280 2026
GAS GAS TXT 280 2025
GAS GAS TXT 280 2024
GAS GAS TXT 280 2023
GAS GAS TXT 280 2022
GAS GAS TXT 280 2021
GAS GAS TXT 280 2020
GAS GAS TXT 280 2019
GAS GAS TXT 280 2018
GAS GAS TXT 280 2017
GAS GAS TXT 280 2016
GAS GAS TXT 280 2015
GAS GAS TXT 280 2014
GAS GAS TXT 280 2013
GAS GAS TXT 280 2012
GAS GAS TXT 280 2011
GAS GAS TXT 280 2010
GAS GAS TXT 280 2009
GAS GAS TXT 280 2008
GAS GAS TXT 280 2007
GAS GAS TXT 280 2006
GAS GAS TXT 280 2005
GAS GAS TXT 280 2004
GAS GAS TXT 300 2026
GAS GAS TXT 300 2025
GAS GAS TXT 300 2024
GAS GAS TXT 300 2023
GAS GAS TXT 300 2022
GAS GAS TXT 300 2021
GAS GAS TXT 300 2020
GAS GAS TXT 300 2019
GAS GAS TXT 300 2018
GAS GAS TXT 300 2017
GAS GAS TXT 300 2016
GAS GAS TXT 300 2015
GAS GAS TXT 300 2014
GAS GAS TXT 300 2013
GAS GAS TXT 300 2012
GAS GAS TXT 300 2011
GAS GAS TXT 300 2010
GAS GAS TXT 300 2009
GAS GAS TXT 300 2008
GAS GAS TXT 300 2007
GAS GAS TXT 300 2006
GAS GAS TXT 300 2005
GAS GAS TXT 300 2004
SCORPA SC 125 2017
SCORPA SC 125 2016
SCORPA SC 125 2015
SCORPA SC 250 2017
SCORPA SC 250 2016
SCORPA SC 250 2015
SCORPA SC 300 2017
SCORPA SC 300 2016
SCORPA SC 300 2015
SHERCO ST 125 2026
SHERCO ST 125 2025
SHERCO ST 125 2024
SHERCO ST 125 2023
SHERCO ST 125 2022
SHERCO ST 125 2021
SHERCO ST 125 2020
SHERCO ST 125 2019
SHERCO ST 125 2018
SHERCO ST 125 2017
SHERCO ST 125 2016
SHERCO ST 125 2015
SHERCO ST 125 2014
SHERCO ST 125 2013
SHERCO ST 125 2012
SHERCO ST 125 2011
SHERCO ST 125 2010
SHERCO ST 125 2009
SHERCO ST 125 2008
SHERCO ST 125 2007
SHERCO ST 125 2006
SHERCO ST 125 2005
SHERCO ST 125 2004
SHERCO ST 125 2003
SHERCO ST 125 2002
SHERCO ST 250 2026
SHERCO ST 250 2025
SHERCO ST 250 2024
SHERCO ST 250 2023
SHERCO ST 250 2022
SHERCO ST 250 2021
SHERCO ST 250 2020
SHERCO ST 250 2019
SHERCO ST 250 2018
SHERCO ST 250 2017
SHERCO ST 250 2016
SHERCO ST 250 2015
SHERCO ST 250 2014
SHERCO ST 250 2013
SHERCO ST 250 2012
SHERCO ST 250 2011
SHERCO ST 250 2010
SHERCO ST 250 2009
SHERCO ST 250 2008
SHERCO ST 250 2007
SHERCO ST 250 2006
SHERCO ST 250 2005
SHERCO ST 250 2004
SHERCO ST 250 2003
SHERCO ST 250 2002
SHERCO ST 300 2026
SHERCO ST 300 2025
SHERCO ST 300 2024
SHERCO ST 300 2023
SHERCO ST 300 2022
SHERCO ST 300 2021
SHERCO ST 300 2020
SHERCO ST 300 2019
SHERCO ST 300 2018
SHERCO ST 300 2017
SHERCO ST 300 2016
SHERCO ST 300 2015
SHERCO ST 300 2014
TRS ONE 125 2026
TRS ONE 125 2025
TRS ONE 125 2024
TRS ONE 125 2023
TRS ONE 125 2022
TRS ONE 125 2021
TRS ONE 125 2020
TRS ONE 125 2019
TRS ONE 125 2018
TRS ONE 250 2026
TRS ONE 250 2025
TRS ONE 250 2024
TRS ONE 250 2023
TRS ONE 250 2022
TRS ONE 250 2021
TRS ONE 250 2020
TRS ONE 250 2019
TRS ONE 250 2018
TRS ONE 250 2017
TRS ONE 250 2016
TRS ONE 280 2026
TRS ONE 280 2025
TRS ONE 280 2024
TRS ONE 280 2023
TRS ONE 280 2022
TRS ONE 280 2021
TRS ONE 280 2020
TRS ONE 280 2019
TRS ONE 280 2018
TRS ONE 280 2017
TRS ONE 280 2016
TRS ONE 300 2026
TRS ONE 300 2025
TRS ONE 300 2024
TRS ONE 300 2023
TRS ONE 300 2022
TRS ONE 300 2021
TRS ONE 300 2020
TRS ONE 300 2019
TRS ONE 300 2018
TRS ONE 300 2017
TRS ONE 300 2016