Well the only thing I could say is I love porting motors also... I just wanna play with my new grinder... The only thing is I don't stop grinding til there's only the glow plug left then I realize that I went to far...... In other words, If people want a motor to "rev" out more... Why don't we contact the manufacturer to improve their motors.. (again) It's a none stop thing.. poeple are never satisfied I guess.. Speed does funny things to us guys...
RVD has ported my motor (magnum 46pro) and my other buddy's 40la that was a bag.. They both woke right up. I have no ideal how much rpm we gained but mine climbs to the sky now... Might not last long but it will do for now.. (til I get the nelson)My buddy has the 40la in a pt 20 and beleive me, It probably goes about 20 miles an hour faster.. As for the balancing part of it. well I have no ideal if it's out of balance or not but they seem to run really good. I wouldn't recomend doing something like this on your favorite motor or anything, But like ed said, If you have the junkers, your go to go...
Oh yea one more thing, rvd has a 47, 60 gms and 60 os and 46 skyward and ?? He ported all of them... When he starts something he can't stop... He even ported he 47 for his trainer. And he wonders why he has flutter when it's pulling 30,000 (it seems) rpm.... the guy is a maniac.. He sleeps on metal shaving cuz his basement is full of shavings.. HEHE.. L8ER