Brainstorm 2-stroke bogging with me....

ive had a carby that had to have choke on half to ride, O ringed it, silicon sealant, no change. adjusted needle settings, no change. i fiddled till i couldnt fiddle no more so hit the company up, who sold motor, to give me a new carby at cost price. friends of mine have had same issues and resolved problem by lightly sanding needle. makes sense as i understand if not enough fuel is getting through less air is needed, ie choke on. try putting needle in a drill where the drill bit would go, even sanding. not too much mind you. baby steps.

The thought had crossed my mind....along the lines of the jet being too small.

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Re-tapering the needle-

If you use a drill, be VERY EXTREMELY careful not to damage the needle.

I rolled mine on the benchtop while pinching it with some 320 wet-or-dry sandpaper, tiny drop of WD-40 on it too.

You want to take of only at the top just short of where the taper ends.

Sand-test-sand-test.

It doesn't take much, and you can get things really out of whack fast if you're not careful.

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If it ain't broke, and you mess with it long enough, it will be.

On mine I figured it was more of a jet size issue than a needle size - let's wait to see what stormin' Norman says.

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I anxious to hear the verdict since I've developed a similar problem.Runs great for about 5 miles But when warmed up or hot begins to cut out under full throttle.Definitely something that occurs after the engine gets hot.Ron

Pablo your carb is fixed took me 5 minutes.
Lord Vader
Norman

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What was wrong?

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Thanks Mr. Darth!!!

He told me my needle was too fat. .005" over.....that seems like a LOT

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well that would do it I guess. Not that I have a clue lol.. Seems I have heard of that recently on another kit. had to be sanded. I think Joe was giving directions abut how to do that.

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Well I was too chicken to go messing with it....I don't even know what the diameter and taper are supposed to be. I think I read the jet diameter somewhere, but not the pin.

Interesting...pin too large - open throttle, lots of air but not enough fuel coming up the jet way.......

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