jesse you should be able to go by the 2276 cc & be alright , and the u-bend is also gonna give it even more according to 95% of the people who have tried both types of headers !! :wink:

gasman ,
thats an 80mm crank x 94mm that makes a 2221 , they are very strong reliable engines , but when they come out with yhe 82mm , it kinda got shoved to the side , but they turn up like a 2180 but with a good bit more torque , in the 80's they were the shit to have , i wish i could find one in good shape to buy & put on a beeline explorer 2 seater frame , best all around crank produced imo. !! 8)