I was hoping someone can enlighten me about this subject. I've been doing some research but can't find my answer.

I have two trx 90's, I have two boys. They both go too fast! I see a little hole where there looked to be a screw on the back side of the thumb throttle, on both bikes, but neither of my bikes have the screw in there?

I also have a suzuki lt 80 that has a throttle lever limiter and the screw is in there, so I very easily adjust the amount that the thumb throttle can be pushed in.

My question is can I get the screw for these trx 90's so I can limit them or is there another way to do so? When I look up a parts diagram I cannot see where I can purchase a screw.

Thanks!

 

forgot to mention one is a 1993 and othe other a 1994 honda trx 90

 

Here's a video of a new TRX90X hitting the rev limiter in 4th gear:

 

Yes, a screw was originally in there to limit throttle travel. Looks like maybe a 6x35 panhead, you should be able to pick one up at the local hardware store.