Oh cool might have the big bore installed on the engine soon. The ring's are thinner than stock and a little tricky to compress. Motor's never been run it's the one I put Japanese bearings in I put SBP 8.8 studs on it too. Got a spare magneto off my neighbor since my wires were ripped off and a cdi. I'll have to see about fitment. Probably going to order that X-port so I can use a banana pipe and might have to figure something out to redirect the air filter to the side. Do you think it would be capable of 40mph with the OZ reed valve and 23mm intake along with the banana pipe and the 48mm cylinder? Oh and a Mikuni VM18