Throttle is Stuck Wide Open

I got a 1971 Honda CT70 and it was running great till a few months ago and the throttle decided it didn't want to return to idle while I was riding. Now that I have some free time I would like to restore and repair this little buger to its street legal state. So I have come to you guys and maybe gals(?) for your help/ advice/ assistance.

Thanks, Brandon

I took the throttle assembly apart trying to find the reason but I'm not much of a mechanic.

The images didn't load properly but follow this link to see the images ----> Trail 70

I know a little bit about 1971 CT70's. They do not have a throttle return spring. You need to manually return the throttle to the closed position.

http://grassrootsmotorsports.com/forum/grm/71-honda-ct70-mini-trail-vintage-pit-bike-update/1645/page1/#post21137

The slide-type throttle in that carb is pretty easy to hang up. I'd vote for a thorough carb cleaning - but make sure to note the positions of all the adjustment screws before you take it apart.

Alright, Im pretty sure the carb is well in need of a cleaning and a tune up. Any suggestions on how to properly clean and possibly tune it?

Woody wrote: I know a little bit about 1971 CT70's. They do not have a throttle return spring. You need to manually return the throttle to the closed position.

I knew a guy when I was in high school who bought one new, and that's right - no return spring. I remember him talking about how he'd ride the thing to the next town 20 miles away without touching the handlebars - just crank it wide open and sit back. :)

If it has the 'slide' type of throttle, those things will wear and the 'screw' on the inside of the throttle tube will ride over the slide, causing it to jam. Had a Mini Trail 50 do that to me way back when. The 'slide' is #15 in the (proudly hotlinked!) picture below.

And here I thought we were going to talk about excuses to give cops . . .

Well this could be used as an excuse to give to the cop, because its basically twist and let go and she just goes.

I guess I should have been a little more specific, I cant get the bike to throttle down, I've twisted the throttle back to idle position and I have made sure the cable is free to move yet the motor is pegged.

The general consensus in the CT 70 world is not to bother rebuilding the carb unless you're shooting for a 100 point show bike. Replacement carbs are only about $70 from Dr. ATV. The look a little different, but they work a lot better.