I took a 2008 whizzer ambassador and installed the hf212 with tav... 2.6" pulley kept it around 55...the pulleys over 3" were too fast(the 212 doesn't struggle ever)...that bike had three different pull type carbs on it for testing...one 22mm and a 26mm and 19mm...I couldn't tell which was better but the scrawny thing they come with probably wouldn't do that. I also had a nice whizzer exhaust pipe adapted to it and I'm sure that helped. Very potent setup and cheap to do.....I mounted the engine at 90° without any issues. The kid that bought it has put maybe 1500 or more on it without probs and added a seat to carry his gal....160-190 should have similar go power