this thread is incredible. been running a 78 550k for about a year and a half now. about 8 months ago i got a 650 for super cheap that wasn't running but was a complete bike. started pulling the engine apart just to kind of "see" what was inside. didn't really know what i wanted to do with it at the time and made a rebuild thread i should probably delete since i stopped on it. had been in the market for another 550 engine just to rebuild to eventually put on my 550k with the 650 cam and all of that. but after reading this thread, putting the 650 top on the 550 bottom with the 750 pistons seems to be the way to go.
currently in my arsenal of parts are essentially 2 bikes:
complete 79 or 80 650 engine, carbs and 4-4 exhaust
complete 75 or 75 550f engine and carbs
i'm trying to compile a list of the other parts that i'll need, any help with this would be appreciated:
750 carbs (would it be possible to use the 650 carbs if they were rejetted?)
750 pistons (ideally 811/812 or 836)
750 sleeves
what else? i've read through the thread a few times, but it seems like everything else is already in the 550 or 650 motor.
would like to compile all the parts before i really get into this. and i've got a buddy who works at a machine shop, so i'm hoping to get a good hookup on any of the machining i need done.
once i compile all my parts, i'll definitely keep a thread going about the whole process. stopped posting on my last 650 thread because i lost motivation on what the hell i actually wanted to do with the thing. now i have a real sense of direction on what i want to do with these things, so that should help.
puck