I have a Bergmann longblock 2275 He builds them mild not wild My engine has 44idfs ,1 1/2 kymco heater box exhaust,pulls strong to 5000rpm with a 110 cam and I can just keep tinkering with it and getting my hands greasy. This winter I'm going to have the heads ported +polished and maybe upgrade the cam to a 120 or bigger. I put 7000k on it this summer no problems once I got the jets near right. If I do this stuff this winter I'll have to put it on the dyno to see what I have. I think its more fun this way because I learn as I go and I'll know the workings of a hipo type 1 when I'm done. Good luck vdubyah73