http://www.diygokarts.com/vb/images/attach/jpg.gif
i think you made a wise choice.i like the 390 but i have a large cart.you should be able to sell the 390,they cost a ton.
it is a 60 tooth sprocket,so i set it in my drill press with a drill vice and used a bit extension to drill it out.a normal t handle was long enough to tap it.say that real fast and it sounds easy.
i found the article surfing,so it would hard to find.im a old dirt bike rider that has gone to honda atc.maybe im expecting too much.our local sand strip is dialin so maybe i should concentrate on consistency not on speed.this is my frist cart in over 50 years.
i have read that the carb on the 390 is small for that displacement.has anyone had any experience with replacing it?one article i read said the actual horsepower of that engine with the governor is 11 not 13.5.