Keep yer grubby mitts off mine. I have 2, one going and one in bits awaiting a gold lotto win, to put back together. Nearly have all the bits, for number 2. The one I have running is a freak. I started collecting bits for a build up a while ago and after buying a frame with an IT175 motor resting in it and a few other bits, I was offered a complete bike excluding the front forks and wheel. I had it running that afternoon with other forks and wheel. I then pulled the motor down and put all the best bits in it from what I had collected. I bought US competion yellow plastics for something different. I had a coil pack fail, and a crank seal fail first up. Since then it has not missed a beat. It drags my sorry 100kg around no problems at all. (Don't report me for cruelty). Not a show pony by any means.
A lot of people rubbish the Js now and did when they were new. I loved my mine in 82 and love mine now. It has been a great bike. Not getting any parts out of me, but will help out in other ways if I can. There are always heaps of bits on Ebay in the US. There must have been a few million of them sold.
Retro