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A good friend bought an old 2001 XR100r fr his grandkids to play on. Needed rebuilding so he disassembled it and bought gasket kits and scrounged up some missing/damaged parts. Then, his hands started giving him problems and he can't reassemble it. So, I've brought it all home and started.. But, right off the bat the cylinder is bad beyond honing (.05mm taper and serious rust damage). There are no machine shops around here that do motorcycle cylinder boring. I know that I can send it off and for ~$90 get it bored out from ~53mm to 53.25 or 53.5mm but add in the cost of pistons, rings, wrist pin and shipping and it is more than a big bore kit. So, I'll be ordering the TB kit soon. Gonna reassemble the transmission, clutch, crank and such first just to make sure there are no surprises there. I'll get some photos up before long.