I have said this about a million times on this forum:
"The ONLY way a gasoline engine can rev is by getting air from somewhere."

Your engine is getting air from somewhere. Where? I have no idea. Could have a leak from a seal. Slide could be hung up. Cable could be hung up. Carb boot. There is just a ton of places an engine can suck air from.

Find the leak and you will find you problem.

 

Barrel=slide where the needle is.
Run away:: it should want to move but not as hard as you explained....I think.

 

Hi LT80,

The cut part of the slide is facing the front of the bike. I think the slide can only go into the carb one way.

Can you provide some additional details as to why the bike should not run away? The way the clutch works on the LT80, the more gas you give it the the faster the bike should move.

 

When you described "rev to the moon" I took it as it's revving much higher than it would normally even with the choke on.
If it's just wanting to move a lil, it may be fine.
Agreed, the slide only goes in one way..Unless you don't align the notch in the slide with the pin and jam the top on anyways. LOL

 

It is moving more than a little...it actually rolled away the first time because I forgot to put the rear on blocks. If I had to guess about the RPM when it first started with choke on, I would guess it would be around 1/3 to 1/2 throttle. Way too high...even with choke on.

Anyways, I ordered new crank seals since it was pretty cheap ($3.50ea). After studying the manual, the job of replacing the crank seals look straight forward. I got so much invested, hate to give up on the bike now if new seals will fix my bike.

 

Well, here is the latest update on my bike.

Finally figured out the problem on why it was revving to the moon. It was caused by the air screw. I had the air screw in too much so it would cause the barrel or slider to sit too high.

Want to thanks for all the help! I still need to mess with the idle, but it starts and run good now!

 

That's the idle screw.
There is no air screw.
Glad you got it going.

 

Thanks guys, I needed cash and didn't have cash for a mechanic, saw your thread. Looked for the extra air intake and solved the issue. Sold the quad and alls good. Your advice is much appreciated