Right here's the thing ill start from when I brought the bike in June of this month I was on the road on the 30th of June I have a mollossi cast iron LC kit I had 67mph going down a A road which was reasonable but some strange reason my bike will only go 40mph now and sounds as if its going to blow up I've took the head and barrel of to check the are both fine also piston and rings and fine on this kit I have changed the clutch, Belt, Vairator and still the same and surgestions how to fix this problem? p.s I really need this sorting thanks a lot Chase..
if the engines all good it must be transmission or carb problems check your jets are clean n rollers n plug check or have a look for a air leak that can make your bike run poor