I had a Kawasaki bayou 300 4x4 but it was stolen a couple years ago. I am 68 and really needed a 4 wheeler with all the work to do around here. but anyway, my son-in-law gave me his old 4 wheeler but it has a few problems. first of all it,s a Kawasaki bayou 300 don,t know for sure what year it is cause can,t make out all the vin numbers. But from everything I could find out it looks like it,s a 300 B and best guess on the year would say it,s a 1988 or 1989 and it,s not a 4x4 it has a differential drive. The main problem I have with it is I have to put it in 1st gear just to get it up a small grade it greatly lacks power. But it does not seem to be a gas problem more like a gear drive problem it starts ok and drives on flat surface just fine. it dont miss or backfire. Does it have a vacuum my car acted like that once no power and the problem was the vacuum. Where should I start?