Been following loads of advice, and have certainly learned a lot.
My set up is PX200 , Malossi 210 , now on a JL Evo 2000 pipe (nice) , with crank cases NOT done (yet , but will be in near future).
My question is… should I be drilling a hole in the air filter ?
Runs very fast on a 125 jet (but plug suggests quite lean)
Runs ok , but safer looking on 130 but not as quick.
HP4 flywheel fitted does seem to help get up there too , although I do miss the bright lights at night (and elec start).
The JL pipe as suggested in here seems VERY good.