I'm about to use this motor as a boat anchor!

toker_ace · #1 04-16-2009, 06:06 AM

My engine has about two full tanks run through it and it just won't clear its throat. It's 20 inch and I would say top speed is about 15 mph. I've played with the C clip on the carb nettle,new plug,leaner gas,ect..... It takes off then about half speed it just will not open up!I keep waiting on it to spit a huge lugee out and take off. Anyone got any info. I got it from dax. Duane is a great person to do business with, but this 80cc premium(whatever that means,lol) isn't premium. Maybe it's just still real tight????????????????????????????????????????????? ????/

deacon · #2 04-16-2009, 06:11 AM

Did you call dax to see what he suggests. I have not had that happen but I have heard that some of the carb jets are not the right size. But by far I know less than anyone here.

Bikeguy Joe · #3 04-16-2009, 06:39 AM

Sounds like the case of a overly large main jet.

There are several ways to lean it out...solder the jet closed and re-drill it, or open up the exhaust and air filter a little.

toker_ace · #4 04-16-2009, 07:08 AM

This may be a stupid question. Where and what is the jet.My exhaust is totally open. Its a straight pipe. Its not the pipe because it ran the same with the factory exhaust.Maybe I should run it for a minute without the air filter on and see if that changes anything. It has ran the same way since the day I bought it, so I doubt its the muffler or a dirty air filter. You don't think its in the magneto do you? It feels like something in the carb.

Bikeguy Joe · #5 04-16-2009, 07:12 AM

The jet is the brass thing with the hole in it that the needle goes into, inside the carb. Is your C clip at the top notch? If you can move it up a notch, I'd try that first. If it's too rich, moving it to the top notch should help a little.
I've had a couple that were still too rich at that setting.

Bikeguy Joe · #6 04-16-2009, 07:14 AM

Also,what does the plug look like?

toker_ace · #7 04-16-2009, 07:14 AM

I,ve moved it all around Joe. So, if i take the carb out and look down where the needle goes thats my jet? what size should it be? (the plug)Its clean. I really don't know what it should look like,but its a little gray and not oily.I'm running a synthetic oil at 40:1 and i still see oil in the end of my pipe?

Finfan · #8 04-16-2009, 09:12 AM

Try using natural oil at about 20:1 for breaking in. Your mix may not be helping the issue.

leftywoody · #9 04-16-2009, 09:14 AM

just for the sake of checking everything . could you get that motor running and unhook the throttle cable at the hand grip on the handlebar and pull on the cable by hand , to see if the motor peaks out . Could it be the twist throttle malfunctioning ?

deacon · #10 04-16-2009, 10:37 AM

Quote:

Originally Posted by leftywoody

just for the sake of checking everything . could you get that motor running and unhook the throttle cable at the hand grip on the handlebar and pull on the cable by hand , to see if the motor peaks out . Could it be the twist throttle malfunctioning ?

Good thought cable adjustment is on top of the carb. the thing that looks like a Buddhist temple