I sorted out my chain alignment today.
I took the old gearbox bearing and ground a couple of thou off the outside diameter to make it a tight sliding fit in the housing and then bolted up the output shaft and sprocket.
By eye I had it pretty good, but to be exactly in line I moved the rear hub over another 3mm, so my rear wheel offset will now be 89mm.
I also measured up the hub and the motor for all the spacers I'll need. Now all I need to do is sweet talk the machinist at work again! (That won't be easy, he's in a competition for the best machinist in France and is in the middle of fabbing up a sort of stainless (inox) rugby ball that consists of what looks like a thousand interconnecting parts!)
Webby
I took the old gearbox bearing and ground a couple of thou off the outside diameter to make it a tight sliding fit in the housing and then bolted up the output shaft and sprocket.
By eye I had it pretty good, but to be exactly in line I moved the rear hub over another 3mm, so my rear wheel offset will now be 89mm.
I also measured up the hub and the motor for all the spacers I'll need. Now all I need to do is sweet talk the machinist at work again! (That won't be easy, he's in a competition for the best machinist in France and is in the middle of fabbing up a sort of stainless (inox) rugby ball that consists of what looks like a thousand interconnecting parts!)
Webby