A little help please

[ArizonaATC]

ok so this is about a yamaha bear tracker i have, i tried other yamaha forums first but nobody answered, so i figured you guys could help me out since, i picked up this beat tracker and it seems to run fine but when i get it in 2nd gear it makes a consistent clunking noise seems like every rotation of the tire it clunks and its only in 2nd gear, also i can feel more vibration through the foot pegs while in 2nd. I know this a a 3 wheeler forum but i really need help guys, and youre the best!
is it just a chipped gear tooth, is it still good to drive? or am i in trouble, thanks!

[350for350]

I have no experience with transmissions, but if it only does it in second gear, I'd say that your problem is in the transmission.

[Dirtcrasher]

You have to have some skills to narrow it down. Based on the information you gave, I cannot advise you to do anything without getting it narrowed down.

Lots of shifting problems, I take the gear shift cover off, turn the tire and shift it to see what's going on.

It's usually a simple problem. I haven't even found a bent shift fork in near 30 years of motor work......

Only a few have had bad dogs on the slide select gear in the cases; From someone beating the chit out of it!! And I beat the snot out of my ATC's but I know what I can and cannot do.

[tripledog]

^^^ You want to see a bad dog? Is my freakin' avatar invisible?