Hello for the first time I am rebuilding a Fantic 301 (it says in the side panel anyway) but the piston looks small for a 250. I measured it across the top and it is roughly 62mm across with one ring very close to the top. It has the wrong forks on at the minute they have the thumb up sign on the side so i guess they are from a bultaco. I will be pulling it apart and stripping painting and replacing broken bits. The kickstart had been welded on and it was the wrong one anyway! After grinding it off the splines don't look too bad on the shaft (fingers crossed) After cleaning all the muck off the engine case i found the engine number and Fantic 350. It has a red frame and monoshock rear end with a conical hub,the front has a drum brake but i suspect this will be from the buktaco along with the forks. Does anybody know what size puller i will need to get the rotor off if i need to split it to fit a new shaft? I bought one from ebay which was way too big M32X1.25,there is a 17mm nut holding it on but i have not disturbed it yet. Will this be anti clockwise to undo? This is a new thing to me as i normally stick to road bikes so am learning as i go. It's pretty rough at the minute but it's all there so that's a good start,oh yes the piston has a B on it at the rear so that might mean something to somebody. Any help much apprecieated