OK, lets get this ossa engine cleared, it was pointed out to me that the barrel and head wasn`t right, Drakey and l have all the engine and frame numbers on these bikes, we have be checking it all out, l wasn`t going to sell this engine as l had ideas to build up a road racer, but its all to hard and l don`t have the time or the money to send on a project like that so it for sale, the bottom end is phantom the barrel and head is either pioneer or super pioneer, now this stiletto engine that l have could easly be used in a phantom frame if you had one, the Phantom engine has the same barrel and head as used on the stiletto. The barrel and head are much larger than the pioneer barrel and head. Please if you are not shore about something please call me. I was also told that the porting on a stiletto is the same as a phantom, l am lot sure if the stiletto is a 4 speed or 5 speed. But l have learnt that these engine are left and right gear change.cheers david