hi Rick,it looks like the sh650-11 or the 12 would do fine. not precisely sure which one i got, it was pot luck on ebay �16 all in, of course a second hand original yamaha unit would be preferable to an roc copy. my design brief was it had to have 5 wires, wires about 25cm's long and looked like it mount easily.

regulators are like myself, kinda simple! realistically a honda, suzuki etc unit would do, the 3 like coloured wires link to the generator phases the positive and ground may be tricky, mostly red and black. some kawa's like the klr use 6 wires the extra link to the ign plus, they would be unsuitable

sorry i cant help with a definitive answer, the reg i got has been trouble free for the last 2 1/2 years and 33,000miles.

i guess your having problems with yours, how many miles now?