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Message: <blockquote data-quote="joedrum" data-source="post: 126616" data-attributes="member: 98">ok 83gl1200 there are several running 1" runners ... and dan actuall runs one on a stock 1200 ... but your motor actually has early heads ....dan uses the 32-32 and it is running fine on the 1200...your motor will flow more but i also beleave it will flow fine with the the 1" runners ....and if you buy the 32-32 ..you will for sure get high rpm flow ... i am running at the moment strait 1  1/2 runners and no chokes ... i dropped the chokes when i went to the 1 to 2 transition piece to center charge ...and it by design is a choke and is even better place for it than runner outlets ... and my system will tach to 10,000 rpm where it then hits the rev limiter on the c5....have you figure why the vw carb is leaking yet ... and is it going into the motor ...it could draining back towards the the tank ... on mine as with stock carbs i have been running my carb dry at shut off ...til i get a complete handle on everything that going on my bike ... i think if i was you in your position i would put 32-32 on the bike as next move if i wanted more carb ... to me the progressive 2bbl 32-32 carb is a better choice to cover the entire rpm zone of the oldwing motor ..and i also beleave it better for mpg but a 1200 with early heads is going to be a gas hog mine is seems 35 mpg is what i am getting if good boy on throttle ...but i must say it runs like a rocket to ....</blockquote>