
§ 01 / Part
12121537 FRONT SPROCKET 520 12T
incl. VAT
Usually dispatched within 3 working days.
Authorised stockist
MOTO-MASTER
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§ 02 / About this part
What it is
The MOTO-MASTER FRONT SPROCKET 520 12T, sprockets. Stocked by Iron Offroad, the UK MX hard parts specialist.
This countershaft sprocket sits on your bike's output shaft to drive the final transmission. It is a high-wear component. Inspect it regularly for hooked teeth or thinning profiles. Abrasive mud and grit accelerate wear during heavy sessions. Adjusting the tooth count alters your bike's final drive ratio for technical terrain or faster tracks. Clean the countershaft splines thoroughly before installation. Fit a new circlip or lock washer to secure the assembly. Pair this with a new chain to prevent premature wear on the fresh teeth. This steel construction matches OEM specifications for fitment and durability.
§ 03 / Specs
The numbers
- Brand
- MOTO-MASTER
- Part number
- 12121537
- Category
- Sprockets
- Weight
- 0.12 kg
- VAT
- 20%
// Fitment
Will it fit your bike?
Fits 20 models · 28 year-bands
Gas Gas 24 models
- EC 200 2000–2009
- EC 200 2014
- EC 200 2018–2020
- EC 200 E RACING 2015
- EC 200 RACING 2011
- EC 200 RACING 2013–2015
- EC 200 RACING 2017
- EC 250 2000–2014
- EC 250 2018–2020
- EC 250 E RACING 2015
- EC 250 E4 2018
- EC 250 RACING 2015
- EC 250 RACING 2017
- EC 300 2000–2014
- EC 300 2019–2020
- EC 300 E RACING 2015
- EC 300 E4 2018–2019
- EC 300 RACING 2015
- EC 300 RACING 2017
- EC 300 RANGER 2019–2020
- EC 300 RANGER E4 2019
- XC 200 2019
- XC 250 2018–2019
- XC 300 2018–2019
Rieju 3 models
TM Racing 1 model
No matches. Try a different make or model.
* Fitment data is provided as a guide. Verify compatibility against the bike's owner's manual or service handbook before ordering. Iron Offroad accepts no liability for incorrect application. Full terms and conditions apply.
§ 05 / About Iron Offroad
Iron Offroad
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