660 Engine mods ?'s

Who is the man for internal mod's on the 660's ?
I've Ported Honda, Suzuki, Kawasaki & a few Euro marks. (2 -Stroke & 4 -stroke, 30 Years Exp. And Learning
)
Would be nice to contact a MZ Motor Head on internal mods ? Performance $ Dependability $$$$ Wise ???
What is the Max $ top on Compression without the "Hand Grenade Effect: ??

I've Ported Honda, Suzuki, Kawasaki & a few Euro marks. (2 -Stroke & 4 -stroke, 30 Years Exp. And Learning

Would be nice to contact a MZ Motor Head on internal mods ? Performance $ Dependability $$$$ Wise ???
What is the Max $ top on Compression without the "Hand Grenade Effect: ??
