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Crown of very good quality, identical to the origin but with a much lower price. Available in 48 or 52 teeth, 6 fixing points, Ø102mm.
Crown of excellent quality under the brand CGN, mounts on the mécaboites 50cc DERBI SENDA, PRO DRD, RACING, EVO, BLACK DEVIL .... Available in 48 or 52 teeth, width for chain and pinion of 420, 6 fixing points. 
Central hole diameter Ø102mm, for hub diameter Ø124mm, thickness 6mm, diameter of mounting holes Ø8,4mm. (See diagram below). 
Specific References
Reference: 3420.7257.50
Very good quality, ideal for a refurbishment on your motorcycle 50 with gearbox.
Reference: 167803
AFAM rear transmission crown for your 50cc motorcycle with gearbox.
Reference: 167793
AFAM rear transmission crown for your 50cc motorcycle with gearbox.
Reference: 509882
Reinforced crown DOPLLER with a superb color for motorcycles BETA FACTORY, RR ... 50cc 2T from 2005.
Reference: 0370.3000.30
Very good quality, ideal for refurbishing your motorcycle YAMAHA DTR 50. (adaptation in 420)
Reference: 1051.2230.52
Lightweight ERGAL crown for VENT 50.
Reference: 264776
A crown identical to the origin, at a low price.
Reference: 513618
CONTI reinforced crown for BETA FACTORY, RR... 50cc 2T motorcycles from 2005.
Reference: 2907.1955.45
Very good quality, ideal for adjusting the transmission of your 50cc gearbox as well as possible.
Reference: 500930
DOPLLER reinforced crown in 420 with a superb color for BETA FACTORY, RR ... 50cc 2T motorcycles from 2005.
Reference: 3980.1015.48
Crown high quality for DERBI FENIX 50 and older Senda (tubular frame).
Reference: D520.31
Crown to be machined, in aluminium, available from 30 to 60 teeth! For 520 chain.
Reference: 440147
Crown available in 4 sizes to best adjust your transmission mécaboite 50cc X-POWER, TZR 1998 to today.
Reference: 492590
Crown reinforced DOPLLER in 420 with a superb color for motorcycles DERBI SENDA DRD SM, RS4, GPR ...
Reference: 0404.5003.30
Very good quality, ideal to better adjust the transmission of your bike 50cc or 80cc ... .
Reference: D420.30
Crown to be machined, in aluminium, available from 29 to 78 teeth! For 420 chain.
Crown of very good quality, identical to the origin but with a much lower price. Available in 48 or 52 teeth, 6 fixing points, Ø102mm.
