killa b NYC

my mechanic is doing his last build wich will be my my bike and he is sending me out to grab parts on my own..he gave me a list of wich parts i ccould run...he is building me a (cub set up w/his own custom porting,7mm crank,and my choice of pipes he recommended shears also 38mm carbs..now iam a lil lost w/these carbs he says i should get 38 tmx or is it mtx ? i have 35mm on my other shee and there good up stairs ,but this bike here is suppose to hit all the way and he defently says we will touch 100hp or a lilmore ..he does use the dyno...so basically just wanted some insight on this timeing plate ? these straight cut gears, small bore or big bore shears, and these 38mm carbs,im dying to use the see threw clutch cover but he says they leak a lil....any advice plz guys