Timing
All gaps (points and spark plug)
Use an un-suppressed plug cap
Don't use a plug with any resistance
Check the HT lead
Clearance on the valve lifter, and that it frees easily
Check valve clearances, especially the exhaust valve clearance
Lap the valves in
Check the mag pick-up for resistance
Make sure that there is a good seal between the carb flange and the barrel
My bike was running lean and hot and was totally transformed by fitting a brand new carb and a new mag pick up.
