t5 172 malossi reedvalve jetting

[smoore-gt225]

hi need some advice on my t5 172 malossi reedvalve jetting
it is malossi reedvalve casing is matched etc with a 30mm delly phbh
av266 atomiser, x7 needle 2nd clip from bottom and has a foam filter with a harry barlow machined crank
the problem is i am upto a 150 main jet and i think that is too big
does anyone have jetting for similar set up as i think i might be fueling a air leak somewhere
any advice would be appreciated
cheers steve