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I was hanging out at the track with friends i only see a couple times a year and Jack was there on his I think 1971 Kawasaki G3 100. He says its the first year for the 100 and he can't find an oversize piston and rings, says it has a smaller wrist pin thats hard to match. I did some searching and yeah maybe they are hard to find so can any of you help me point him in the right direction?

He was also talking about the 6 volt electrics and I brought up Vape and HPI complete systems. He had never heard of them so I did some searching and see them for later KE and KH 100's. So once more can any of you tell me if the tapered crank end is the same on the old Kaw 100's? The bikes in great shape otherwise and it buggs me he rides it too easy so it doesn't break

Luke

I'm much more mechanically inclined than electrical so I tend to follow others advice when wires are involved. On my 73 Norton Commando with zenner diodes and stuff the easy low charge voltage fix is the shindengen sh775 rr. It takes the 2 or 3 wires from the generator and connects + and - to the battery. They originally came on Polaris 4 wheelers and gained popularity with the old school 4 stroke crowd. Nowdays I see on forum's for modern bikes with stressed charging systems they use the sh775 or the next version up. Why am I not hearing about these on old 2 strokes like RD's?

Thanks for any feedback and Merry Christmas!
Luke

 A Bridgestone RS200 got left in my barn years ago. I like the looks of it more each time I walk by but the one thing I don't like is the points ignition is on the end of the generator. The generator is mounted on top of the cases over gearbox and driven with an idle gear from crank. Disc valves left and right so their only option at the time. If I can fit a crank triggered ignition with curve it will justify for me the work and expense of building crank, pistons and cylinder plating. Throw in some Jemco pipes, port and head adjustments it should be a solid bike.
So looking in the HPI thread theres a picture of HPI ignition next to Yamaha. I'm thinking I could use an ignition pickup like the Yamaha and cut the bolt ears off. I can mill a pocket in the front of engine cases and mount the pickup. I'll put a trigger bump on a flywheel half. I can do the work but I need some help picking out the best combination of parts. I don't want to make the hole in the cases any bigger than necessary. Any suggestions are welcome