Ok so i got a cagiva w16 600cc single 4stroke. engine **** out on me thursday night. i bought an engine out a river 600 and have managed to get it working (had to swap the stator and starter motors over) so it runs anyway BUT after bout 10 mins of riding it started to nip up, squeaking and on tick over would cut out -_- the oil levels right, oil pump is definatly working new fresh oil in it I just cant figure out what it is.... cam chain tensioner is working its an auto type one by the way. bike is oil and air cooled.... PLEASE help iv been searching everywhere and cant figure this out REPS to who helps!