The choke is actually a fuel enricher. If it is taking it and not drowning itself you may have an air leak. Did you do a leak down test on your new build?
And are the bowls on the correct sides?
Green circle - cutout that needs to face air filter
Red circle - ramp for idle screw (if installed correctly)
Sometimes you need to file more off the carb body to allow the idle screw to go in far enough to lift the slide.
Very hard to say, I bought play cut 9's, but recently had a guy with a 421 cub beat me bad with 6's.
And any variation with staggered cuts only adds more options.
Sorry, all ready have it back together. Didn't think much of it when it was apart. Just noticed it on the reference pic I took when changing out the trans.
Padla-brats come factory molded with 18 paddles, they cut them down to 9 or 6 for you. which is "play cut" or they shave off more rubber in between the paddles down to the carcass for a "race cut"
Thanks, guys.
Looking closer at the F.A.S.T. invoice on my motor that I got from the guy I bought the bike from, it does say "Banshee case porting for Cubs"
I changed the trans in my 421 Serval 4mm 115 rod and noticed these marks in the crank area.
What's it from/for?
I was under the impression a 4mm didn't need trenching. and I've not seen trenching like that.