Need to know what xr600r engines will interchange my 1985 xr600r. Or what cylinders, heads and crank, fit on 85 xr600r want to go to a single carb. ( I know there is a carb alinement problem ) It needs to be rebuilt, cylinder head and crank and where to get best parts. Carbs sticks at a high idle when warm up and leak but if you rev engine it goes down. Anyone know where to get hp rating for all xr600r.