I haven't heard any of the builders happy with timing on any of the big bore kits. Maybe one of the manufacturers needs to start from scratch and stop copying bad copies. Or maybe sleave the cylinder like dyno Joe.
@J&S Chainsaw ya I saw that video. The other 660 kit I have is all the original parts and it screams with just a filter and bark box. Then I did this one with the oe cylinder and brought the lower transfers down to just before the case... I don't think she liked that! Harder than he'll to start, if it starts... and drinks fuel like I drilled a hole in the tank! I got the bb kit just because to see what I can do. Just want this one to run descent haha!