Ariel Motorcycle Club North America Forum

Greg I've posted requests for this information on several sites under the subject of line boring. I believe this is the process used. The factory replacement bearings used to be reamed for final fitting. The current replacement bearings (Draganfly?) are considerably undersized and can not be bored o...

I have new timing side bushes for my 1957 Ariel Square Four. The crankshafts are in good shape, are STD size and do not require a regrind. The new main bushings are about .100" undersize and require boring to size. I am looking for a shop in the southern Ontario (Canada) region that perform line bor...