MOTO-MASTER 7075 Aluminium Rear Sprocket (black) for TM RACING EN, MX 125, 144, 250, 300, 400 2001-2026

Name: MOTO-MASTER 7075 Aluminium Rear Sprocket (black) for TM RACING EN, MX 125, 144, 250, 300, 400 2001-2026
Brand: MOTO-MASTER
SKU: 6201922
Price: 40.75 EUR
Availability: InStock

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€40.75

Tax Included

Available from our supplier, shipped within 10 to 15 days.

MOTO-MASTER 7075 (noire) aluminium rear sprocket for TM RACING EN 125, EN 144, EN 250, EN 300, EN 400, MX 125, MX 144, MX 250, MX 300 from 2001 to 2026. Available in 45 Teeth, 46 Teeth, 47 Teeth, 48 Teeth, 49 Teeth, 50 Teeth, 51 Teeth, 52 Teeth, 53 Teeth.

The MOTO-MASTER 7075 (noire) aluminium rear sprocket is designed for TM RACING EN 125, EN 144, EN 250, EN 300, EN 400, MX 125, MX 144, MX 250, MX 300 from 2001 to 2026. Bolted to the rear wheel, the sprocket takes all of the engine's force through the chain. An aluminium sprocket is the lightest option on the market: the suspension works better and the wheel picks up speed more easily, at the cost of faster wear than a steel sprocket.

Specifications

Brand: MOTO-MASTER
Manufacturer part numbers: 620192245, 620192246, 620192247, 620192248, 620192249, 620192250, 620192251, 620192252, 620192253
Chain pitch: 520
Material: 7075 aluminium (Ergal)
Available versions: 45 Teeth: ref. 620192245; 46 Teeth: ref. 620192246; 47 Teeth: ref. 620192247; 48 Teeth: ref. 620192248; 49 Teeth: ref. 620192249; 50 Teeth: ref. 620192250; 51 Teeth: ref. 620192251; 52 Teeth: ref. 620192252; 53 Teeth: ref. 620192253
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

Clean the hub and check that it isn't cracked or distorted.
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.
While you're at it, replace the front sprocket and the chain if they're worn.
Set the chain tension as per the manual, with the wheel aligned, then lube it with a suitable chain lube.
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 : MOTO-MASTER 6103 · MOTO-MASTER 61033111
Drive chain : RENTHAL · RENTHAL 520
Chain lube : LIQUI MOLY 400 ml · MUC OFF 400 ml

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.

Reference 620192245

In stock9 Items

Specific References

Click on your bike to see all compatible parts.

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MOTO-MASTER 7075 Aluminium Rear Sprocket (black) for TM RACING EN, MX 125, 144, 250, 300, 400 2001-2026

€40.75

Tax Included


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MOTO-MASTER 7075 Aluminium Rear Sprocket (black) for TM RACING EN, MX 125, 144, 250, 300, 400 2001-2026

Specifications

Choosing the right number of teeth

When to replace it?

Fitting tips

Why MOTO-MASTER?

Spare parts and items to plan

Frequently asked questions

Compatibility

MOTO-MASTER 7075 Aluminium Rear Sprocket (black) for TM RACING EN, MX 125, 144, 250, 300, 400 2001-2026