Hi everyone!
I did some new conversion during the winter.
First I replaced on my old trainer with the 40FP converted engine, by an OS max-h 40 (with bearing and ring) and clearly like Bert said this engine architecture is most adapt to conversion than bushed engine with ABC piston.
This engine run smoother, and it's really more regular.

Now I'm on a ASP 91FS conversion. It's my first 4 stroke engine, and for now engine run good at wot, but dead at mid range.
I must do more curve adjustment to find the right mixture ratio.
One question for this engine, how do you set the LS screw on the barrel? Completely open? Completely closed? Like OEM setting?


Thanks!