Rear sprocket 50 steel teeth 428 HM, Derbi, Rieju, Yamaha 50, 125... Sunstar gray

Crown 50 teeth 428 Sunstar gray HM, Derbi, Rieju, Yamaha... 50 125 et

Transmission tray par new chain adaptable for 50cc and 125c HM CRE motorcycles, Derbi baja, Rieju MRT SM AIR CONDITIONING, Yamaha XTR...

Technical characteristics of the crown

• Mark: Sunstar
• Drive train type: 428
• Number of teeth: 50
• Material: steel
• Colour: grey
• Number of fixing holes: 6
• Type of mounting holes: smooth

Dimensions of the rear pinion (see marks on the typical drawing)

• A - Fixing center distance: 80 mm
• B - Fixing center distance: 43 mm
• C - Fixing center distance: 123 mm
• D - Fixing center distance: 108 mm
• E - Diameter of the mounting holes: 8 mm
• F - Inner diameter of the crown: 105 mm

It is essential that you you check the type of drive train you need before ordering. On small motorcycles, most 50cc use the 420 (width 6 mm, center distance 12.7 mm) but some 50s and most 125s use the 428 (width 7 mm, center distance 12.7 mm) even for 125 in 520 (width 6 mm, center distance 15.8 mm). All drive train parts, i.e. front sprocket, chain and rear sprocket, absolutely must be of the same type.