That would be a 520.
There are lots of those available in sealed.
The 520 chain is plenty strong on a twin as well. The narrow 530 sealed just gives 50% more tooth surface,which should translate into greater sprocket longevity.
There are lots of those available in sealed.
The 520 chain is plenty strong on a twin as well. The narrow 530 sealed just gives 50% more tooth surface,which should translate into greater sprocket longevity.