da evil one
XS650 Addict
Alright, so I got my 256 top end all polished and ready to go on one of the 477 motors I acquired. Heres where the questions start and heres what Ive got. The roller came with a 256 motor sans cam, pistons and cam tensioner. I ended up getting two 477 motors off craigslist for cheap but I already had the top end of the 256 motor almost completely polished. So once I found out the 256 top end would bolt up but the cam and pushrods/pistons would have to stay 477 on the bottom I decided to finish the polishing and just take the cam out of one of the 477 motors and put it in the 256 top end and bolt it up. Once I take the top end off the 477 motor Im going to use Im assuming everything should play nice if I just leave the pistons on the crank on the 477 bottom end and put the cam in the 256 top out of the 477 and bolt it up. Ive got the gasket kit and everything. So what I was gonna do is take the top end off the 477 motor and check the jug measurements against the 256 measurements before I put it together. I dont think any of these motors have been overbored. So heres the question: If the tolerances are the same and the rings look o.k. on the 477 pistons should I put it together and compression test it and run with it or do you guys see any problems I may be overlooking here? I dont want to oversimplify things here and what Im doing isnt really talked about in the book. Any suggestions are greatly appreciated! Thanks in advance fellas.