Scooter starts and runs, but won't idle? By aggressor2790 (Read 3,669 times)

[aggressor2790]

The air/fuel mix screw.

[alleyoop]

On the carb which one is that?

[aggressor2790]

Just saw your post asking about that other screw. I'll go get a pic for you

[alleyoop]

I am trying to find out if your turning the CORRECT SCREW.

[aggressor2790]

[replyingto=aggressor2790]aggressor2790[/replyingto]Here's a close up of that odd screw

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[aggressor2790]

[replyingto=aggressor2790]aggressor2790[/replyingto]Is you look at the two screws right before the intake, it's the one on the bottom that I'm turning.

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[alleyoop]

Ok, just wanted to make sure(HAHA), that is the correct screw.

Ok, now when you turn that screw in EITHER DIRECTION 1/4 turns at a time as your turning it 1/4 at a time does the IDLE(RPMS) go up?

IF THEY DO GO UP which way are you turning it CLOCKWISE or COUNTER CLOCKWISE?
Alleyoop

[aggressor2790]

If I turn it counter clockwise, the rpms go up.

[alleyoop]

GREAT FANTASTIC!! Keep turning it COUNTER CLOCKWISE until they do NOT GO UP.
Alleyoop

[alleyoop]

ONCE YOU GET THE HIGHEST IDLE out of that screw LOWER the IDLE USING the IDLE SPEED screw on the WHEEL. Turn that COUNTER CLOCKWISE so your rear wheel Just wants to turn.
Give that a shot
Alleyoop

[aggressor2790]

But wouldn't the screw come out?

[aggressor2790]

I tried, but it didn't really change anything at all. It seems like no matter what I do, it's still the same.


Could it be something else? Was I supposed to put the flywheel on a certain way? Maybe for timing purposes? I was under the impression that as long as I lined up the flywheel with the woodruff key on the crank arm, that it didn't matter.

[aggressor2790]

Or, here's a though.


When I crashed the first scooter a few months ago, it was acting really boggy. Not quite like this one, but still boggy like a dirty carb. So, The next day, I switched it with a carb that was sent to me on accident instead of another part I ordered. It was from the same place I got the scooter from. The carb they sent me was a little different than the stock carb that came on the scooter. I'm not sure what mm it is, but I'll check that out tomorrow. Anyways, instead of cleaning the carb that was on there, I just slapped that on one it, and I THINK that's when the whole revving up high then going back to idle (like in the video), and revving by itself, ect problems started. I have THAT carb on the scooter we're working on now. The carb that was on there before was having idleing problems after I took the flywheel/stator off the replace the woodruff key. Before that, it was running like a champ.

So, I wonder if the carb that I have on there now is either a carb for a 150cc bike, or maybe it was messed up from the get go.

In fact, I actually have a video of when the OTHER scooter was acting the same way.

Here it is:




It's a conspiracy!!

[alleyoop]

The flywheel only goes on one way. It has a slot to fit over the WOODRUFF KEY. The only way you could of messed it up is if when you put it on you pushed the WOODRUFF out of its slot and then your flywheel will rotate and you timing will be off.

No since you said turning it counter clockwise raises the IDLE(RPMS) that means it is giving it more gas and that is what I said IT IS RUNNING VERY LEAN and givig it more gas is making it better. But it appears you don't have enough gas still.

Let me ask this question did you change the jets and what size is the CARB, also clue me in I forgot but if this is a 150cc scoot it should have a 24mm carb.
Alleyoop

[aggressor2790]

I've never messed with the carb. Never changed jets or anything. And the scooter I have is a tao tao atm-1 50cc. I have two of them.