I have just picked up a 1986 Kawasaki 550. It didnt have spark when i got it. Opened the electric box to find a wire pinched. fixed the wire and got the ski to run.Now it doesnt want to charge. I ohmed out the stator and everthing is in spec. My question is will a 1992 js 550 rec/reg work on my 1986 550. The part numbers are 21066-3003 for the 1986 and 21066-3710 for the 1992 550. Thank you in advance