Description
Steel Sprocket Beta RR50 / Fantic Caballero
Doppler delivers sturdy, high-quality sprockets that combine reliable performance with an attractive design. They serve as an ideal replacement for the original part or as a clean visual upgrade for the bike.
Doppler Origin steel sprocket with 53 teeth for 420 chains (standard). Suitable for Beta RR 50 from 2002 to 2005, Fantic Caballero 50 from 2004 to 2015, and Fantic TL/TX 50 from 2017 to 2020.
Note: There may be different versions depending on the model year and build, please compare the dimensions and tooth count of your current sprocket with the picture and the specifications.
Details Doppler steel sprocket
- Mounting: 6 holes, 3x2
- Inner diameter: 100 mm
- Chain type: 420
- Teeth: 53
- Color: Black
Funstion of Rear procket
The rear sprocket of a motorcycle is an essential part of the chain drive. It is mounted directly on the rear wheel and is connected to the front sprocket via a chain.
How can I tell if the sprocket is worn?
You can usually identify rear sprocket wear by inspecting the teeth. Worn teeth have an irregular shape and appear thin, very pointed or bent. You may also notice metallic rattling noises. Severe wear can cause the chain to skip because it slips over the excessively worn teeth.
smaller or larger Sprocket?
- Sprocket with more teeth → improved acceleration
- Sprocket with fewer teeth → higher top speed
You also have to consider the gear ratio between rear and front sprocket. The calculation is: number of teeth of rear sprocket / number of teeth of front spocket. A low ratio increases speed, while a high ratio improves acceleration.
Example: Front sprocket with 13 teeth and rear sprocket with 48 teeth: 48/13 = a ratio of 3.69.
Sprocket types
Steel is preferable to aluminium if you want the longest possible service life. Aluminium is the better choice for maximum performance because it is lighter. Self-cleaning anti-mud rear sprockets are suitable for off-road use in dirt and mud.
Chain care
To ensure optimal life, it is important that you do not neglect chain care, we recommend a special chain brush.
Overview of most common sprockets
- Sprocket, 62 mm internal diameter / 5-hole: Rieju (older models), Peugeot, Motorhispania
- Sprocket, 100 mm internal diameter / 4-hole: Beta RR50 from 2005
- Sprocket, 102 mm internal diameter / 6-hole 3x2: Derbi Senda DRD
- Sprocket, 105 mm internal diameter / 6-hole 3x2: Aprilia, Derbi, Gilera, Rieju, Peugeot, Motorhispania, Yamaha, MBK
- Sprocket, 108 mm internal diameter / 6-hole: Aprilia, Derbi, Gilera