Engine builder pros/cons

i talked to ken oconnor on the phone about building my yz motor and he knows his stuff and a pretty cool guy he will be getting my motor soon. they are probably all good builders i agree with otis call and talk with em and one of em is gonna stand out to u and go with that guy just mo
 
I too have used Oconner services! No problems what so ever. His wait time is alot less than most, Prices are fair too. And you can call him anytime day or night with any questions he answers or get back to you very soon. He doesn't push other products. He really knows these two-strokes!