I have a question for those who might be knowledgeable in such things. Is it possible, by that I mean just swopping barrels & heads & L/H crankcase cover, to convert a ST2 944 water cooled engine to a 900SS/Monster type air cooled engine ? The reason for the question is the project we have in mind is based on an air cooled engine & although in fairness the air cooled & water cooled engines look almost identical, espicially from the right-hand side, we don't want radiators on the finished bike. We would also be junking the injection system & using carbs, maybe flat-slides. On the face of it, the two engines look to be basically the same so we were thinking conversion could be quite straight forward, (forgetting about any cost implications at the moment too). I know some may think this is a bit like reverse engineering, but we have aquired a very cheap ST engine (came with a frame for a project) & although in was a non-runner, (reason unknown at the moment) & quite grubby it does look quite clean internally from what we have seen so far. The water pump is very clean internally & the intakes look quite clean, (we've had a borescope down them). We'll take the plugs out too & have a look at the bores too today. Obviously before using this engine we would strip it down, but providing nothing is beyond economic saving & it can be converted to air cooled we could return it to use.