i have a mid 80s yamaha moto-4 Badger 80cc. its a 4 speed and it has had alot of work done on it. for some reason the engine is bogging down or something because it wont get enough power and speed to get it out of 2nd gear! and ive watched youtube vids with this quad and that thing flys! well, for an 80 lol. but if anyone has any suggestions anything would help thx