Is the axle on the blasty bent? as for the 600 valhalla is right most road bike engines require a ton of work and frame gusseting to make it worth the trouble but hey its your toy right.... as for the katana being a weak motor I think something is wrong with your because I had an 88 600 katana bored .20 over with wiseco pistons, mild port work, 26mm mikuni's and k&n filter thats it and it ran like a raped ape I would smoke liquid cooled magnas and piped kz's all day long there was something to be desired in the clutch department....any time you put any kind of power to the old gsxf motor they would eat clutches. I have osme parts for my old bike if I can find em ill let ya know what i got.I:I
