Recently i have brought 3* 49s20 crankcases and i carnt tell the difference between them and a black case 49.
so can anyone tell me the difference between the series 20, 49 and the black case 49?
!1 any difference in crankcase?
2 any difference in piston and rings?
3 any difference in Backplate and venture size?
4 ant difference in crankshaft?
5 any difference in front end?
6 any difference in timings?
only need provable data as i have lots here-say already thanks!
regards collie