You don't need to rewind your stator. The 650L does have a voltage regulator/rectifier that the 600R does not have. Both bike have a 190 watt stator, stock! You may want to see about getting an aftermarket voltage rectifier/regulator. The XR650L and the XR600R have a different way of generating spark. You'll discover this too. I have never installed an XR650L starter on an XR600R. I don't know if there will be any funky differences. The crank shaft on the 650L may be longer, I don't know. You'll clear those hurdles when you get to them with $$$$$ The funkiness I discovered is that the gear sets are different. You could take an entire XR600R transmission, with the mainshaft and coutershaft and install them on an XR650L engine, but the individual gears have a different design, even though they have identical numbers of teeth, except for first. hey thanks LOB!!! Yeah the 650L is 3 phase power generation. I intend to retain my existing XR600 flywheel and stator without having to swap for the 650L stuff. Yeah got the rectifer worked out so thats cool. More interested in rough dimensions on how much further the 650l left hand crankshaft sticks out compared to the xr600? My plan is to make an adapter and push all the 600 stator and flywheel over further so the starter gear and clutch can be bolted on. I bought the 650l engine cover so hopefully the 600R stator bolts right onto the 650l engine cover. Hopefully retainign the 600R flwyheel and electrics will mean the timing and all will be still aok. if you think of any " gotchas" let me know.