mattscuda

Thanks for the replies. Problem is I'm in Australia and getting parts or spares is a nightmare for anything here and they charge you an arm and a leg for it. Then if you get the part from another country you have to factor in more $$$ for the transport costs and the shipping time. I've had a crack at it anyway and pretty happy with how it has gone. I might still order a replacement when i make an order for the other parts to rebuild the motor and have it as a backup in case it goes pear shaped. I've gone from the standard 18x1mm (i think) thread and machined it down to 16mm for a 16x1.5 thread. The problem with fine threads is that the depth is so shallow it is easier to strip. With the bigger pitch and deeper depth of the thread it won't strip out so easily and get just as much torque (80Nm) on the sprocket. Turning the shaft down to the required size. Using a die nut with the tail stock to keep it square The new thread. I did later on put a slight radius on the end of the shaft to let the thread go all the way to the end. Using a 20mm bolt I machined it down to the shafts thread length as to get as much thread as possible. A slight recess in the nut to tighten on the sprocket washer Tapping the thread on the nut End product Just need to get the locking washer but I reckon it will last a long time.

Hey fellas, New to the forum and banshee world. Been keen on these for a while and was able to get one the other day for next to nothing. Needs some work but I planned on a complete strip down and build. So I have found that the previous owner had welded the sprocket to the countershaft due to it stripping. I've stripped the whole motor down anyways for a new set of rings and an easy gearbox fix. But now I've found this. I have access to some workshop equipment (lathe, mill, welders, ect) and am competent with all the equipement. I have a couple of ways of repairing the shaft but wondering if it will be sufice. 1) Weld the shaft and turn it down in the lathe and re thread the shaft (not sure if this will cause more harm than good) 2) Turn the shaft down and re thread with a smaller diametre thread 3) Machine a groove on the shaft and put a circlip in ( Sprocket will need to be tight so probably not a good idea) 4) Tap the shaft and put a bolt with washers to hold the sprocket on. 5) Buy a new shaft (would rather do a repair as it won't cost me anything) What route would be the best option. I'm leaning towards the smaller diametre thread or welding and turning down. Cheers Matt