I'm looking for a good aftermarket source for main jets,the push in kind for my 72' CB350 twin,I have the O.E. carbs model# 722A.I want to get them w/ o-rings if possible.These carbs have a large(#105) main jet & an intermediate main(#68..I think) & I want to dial the carbs in correctly....the O.E.Honda dealer supply is very limited.