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If I was able to find a 447 crank will it interchange easy?

Well I basically ordered everything to redo the whole top end. It wasn’t because I had to. it was because I could. Springs, valves, cam, rockers. I was even going to try and port the head to get everything really rolling. I’m no mechanic but I learn quick. Im hoping I can pull it off. We will...

It went from running half decent to smoking and pumping oil through it. Piston on left is untouched. Piston on right I wiped a bit for numbers. The bores look clean to me. No scuffs clean and no ridges that I can tell. If you look at the valves though that’s untouched. It’s burning oil like...

Yeah I guess bottom end is coming a part. It burned like 3 litres of oil in 30 minutes trying to get it home. Figured valve seals and a top end would be on point. Guess not.

Piston is 74mm and the piston pin was 20 mm. So I did a quick little read and everyone is saying 256 pistons are 74 mm. What do I need to make the 447 parts work. Fml

It says 050 on the top and 956 on the side of the piston.

Hey people. I have a xs 650 bobber. Just ordered a bunch of 447 big bore parts to pump up a dead engine. Pretty sure I messed up because now that I have it a part one of the pistons says 256 on it. My head tube says s650-024946. If it is a 256 engine do I need to order rods to make everything...