i set my air screws at 2 1/4 turns out tune your bike in and it should rip change gearing when i ran a stock tranny i liked the gear ratio 13/40 pulled hard in second you do need to get rid of those turf tammers they dont hook at all
yes go with the shearers and you can get by with 8 over swinger i would go a 10 maybe even check on those new vito cylinders they look stock but have tripple exhaust ports made in them sleeper look