ORIGINAL: nitrobill65
roguedog if you shave the head down 2 mm you change the squiss band of the comustion chamber. this could cause pre-detonation and a host of other problems. and as far as your article i glanced at it and got the jest of it.and with out using the shorter fsr rod u would have to use a end mill to make the head less than flush to the top of the liner.because with the longer hanno rod the piston comes flush to the top of the sleeve. hence shaving the head along does not work. and i have measured the ID of the sleeve and it is in dead 24 mm.locking at the sleeve how ever it does remind me of say rossi or picco. but if you look at the picture of the top of the sleeve yousee that there is an accurate key way to guide and hold the cylinder and ports in proper alignment.has rossi copied OS in it,s manufacture of engines.anyways roguedog have you ever even eaten in canada.
nitrobill65. I agree. Here's what I'm thinking. If the bore is 24mm and from the pic of the blue head it looks as if it has the standard protrusion into the liner, maybe someone put a VF/FSR crank in it. From what you've said so far the only way I can think that your engine is a .67ci, is if it's using the long stroke crank and is using a custom conrod, otherwise you have a VF/FSR crank in there. Here's a few pics of the 3 different cranks. Which one you got? You could possibly have a custom crank as well.
Oh ya. I only eat Amercan food. hehe
Bryan