LML T5 150cc Cilynder head

[Vespista_ZD]

Hello...i have an extra cilynder head for vespa LML T5 150cc(one with central spark plug and long thread) and i want to lower it a bit...just to get bigger compression and some extra power...i read that original engine has a 9:1 compression ratio...and i think that 0.2mm would be ok to get a bit more power and not to get damaged bearings and crankshaft...