Picked up a 79 Honda 110 the other day and it idles really high. Start it up and the engine is racing....took the carb apart, cleaned it out and adjusted the idle screw as well as the main jet screw....worked for a little bit and then wanted to idle high again. What's the deal?

Also, when I pull on the pull starter, it sometimes wants to try and yank back in and will want to backfire. Any clues?

Valves off? Timing off?

A buddy who has a 200 told me his will sometimes do the same when his is running lean...is this the case?

Thanks,
RJ

 

Try adjusting the throttle cable at the top of the carb, screw it in some may not be letting the slide go down all the way, check the intake boot for cracks that will let air in if so seal them up, take some oil and put it on the o ring going from carb to intake to revitalize it a little may be hard and flat, also look to make sure the cable is routed not to stretch or get pinched. as for as the other stuff don't know.

 

No kinks in the throttle cable. I've made sure it is moving as it should.

Currently, I've got no air filter on it. The o ring might be a bit dry...but when I took the carb apart, didn't notice it being dry.

Question...when it revs/idles high, is that too much air or too much fuel? I thought it was too much fuel. I've adjusted the pin that is moved by the throttle cable as far down as possible, screwed the main jet screw in tight and backed the idle pin out as far as possible.

Do I have things backwards?

 

The main jet dosen't come into play till 3/4 throttle, and the needle jet ( pin ) dosen't come into play till 1/4 throttle so you can rule those out. high idleing is usually an air seepage problem not saying it can't be fuel related. no air filter won't have any bearing on that but you are letting stuff in that will hurt the engine. Also check the bottom of the slide to make sure it isn't chipped from somebody putting it in and hitting the idle screw with it. Did you try screwing the cable in at the top of the carb? Also check the o ring that is inside the cap on the top of the carb a couple times mine were bad so I wrapped the threads with teflon tape to fix it. Check for hairline cracks by the studs or little splits on the intake. Hope this helps.

 

Okay...went back and looked at it this evening. Looks like something was catching right where the cable goes into the plastic elbow and down into the top of the carb. I know...I know...I checked it before and thought I'd gotten it pushed in there enough. Didn't realize it screwed in...so I just electrical taped the mess out of it to keep it in. Works great now.

Put the clip on the needle back to the middle groove. Adjusted the idle screw and main jet....purs like a kitten. Actually...had my neighbor come up and want to buy it off me. Hopefully he'll buy it as I've got a couple more to mess with and sell.

Thanks for the help!

 

Glad you got it figured out, it's easy to overlook something especially after like the 3rd or 4th time pulling the carb off in one day a little aggraviated on top of it all been there a few times. There should be a rubber boot on the end of the cable that slides onto the top part of the carb cap to prevent the cable from moving after it's installed.

 

Yup...that rubber boot is there, but for some reason, the metal end of the cable somehow came out of that and got stuck on the boot. So to keep that from happening again, I electrical taped the mess out of it. Must have happened, when I was putting the gas tank back on.

Thanks again.

 

I just cleaned the carborator on my 110 Honda .. And I put it all back and now the throttle is stuck wide open when I start it? Any ideas?

 

Check to make sure you didn't put the slide in wrong first. It only goes in one way to where it seats correctly. I know it sounds simple but I've done it myself. If that's not the issue let us know.