Fox Trail Bug Wheelie Machine

[smwtnbndr]

I have a Fox Trail Bug with a jackshaft. The centrifigual clutch has a 12t to the jackshaft which has 18t. The jackshaft is 12t to the rear sprocket of 72t. The rear tire is a 4.10x3.5-6. This is a wheelie poppin machine. I am a healthy 250 6'1" and I cannot keep the front wheel on the ground.
Enough about me, I have two boys who are itching to ride this machine and there is no way I could allow that. Should I swap out the 18t for something smaller or what? Any help is appreciated. Thanks

 

[rmm727]

You could do that. The top speed would increase more and more as you changed the 18t sprocket to a smaller and smaller sprocket.

 

[buckeye]

That's a nice survivor. Big rear sproket gives it a lot of take off too.

 

[bigrob]

Put a throttle stop screw on it or a wheelie bar and let them ride , we all learned lol

 

[shackwrrr]

For the kids swap the 18 and the 12 so its 12-12/18-72. 4:1 should move kids pretty easy but will have a pretty high top speed.

 

[Scottessey]

Are you sure you have a 72 in the back? Mine is a 60. Just wonderin'... :shrug:

 

[smwtnbndr]

Positive, counted the dang thing twice.

 

[Scottessey]

Positive, counted the dang thing twice.

I was just surprised to see the tooth count. According to a brochure I have on the trailbug, they came stock with a 60t. At least, they did at the time that brochure was made. :shrug: I'm not too experienced with figuring out the gearing. I've used the online calculators on this site in the past. :thumbsup: