hey guys, just wondering if anybody knows why I can get my bike to just over 75 mph in 5th but as soon as I change up to 6th I lose all power and the speed will drop to about 58mph ? cheers,

Simple the gearing is to high in 6th to keep it int the power

try one tooth less on the front sprocket

will give the sprocket a try , thanks guys

Check your jetting settings, bad pilot and/or needle jetting will cause a loss of power at low/medium revs...