the exhaust seems fine, no holes or leaks at gasket points. but the engine itself seems to be running rough(like i can hear the parts turning inside), maybe because it hasnt been run ina while or maybe not enough transmission fluid?(i changed it and added the told ammount of 170mL) It also could just be that im used to my old 1hp tomos and this is a 1.5 or 2 hp puch. Also I barely get any power at low speeds but it takes off like a cheetah on coke once i get to about 10mph-maybe a throttle issue? It is a 1 speed so maybe thats just the nature of it, (also used to 2 speed tomos) Also i have to mess with my idle screw. anyone know how it works?