phatmanxxl
Scoot Enthusiast
Posts: 484
Location: Missoura
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Post by phatmanxxl on Sept 29, 2016 20:25:37 GMT -5
New carb, cleaned the air filter, new fuel filter, A/F screw seems correct, new exhaust and intake gasket, inspected hoses for cracks. Getting frustrated here, I'll probably do a valve adjustment tomorrow. #88 jet.
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Post by humanshield on Sept 29, 2016 20:35:25 GMT -5
1). Was it doing this before the new carb?
2). Have you changed anything electrical? Stator?
It is definitely not revving cleanly.
Remove the pod air filter.....still does it?
Check the intake manifold bolts and boot clamp.
Too rich?
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phatmanxxl
Scoot Enthusiast
Posts: 484
Location: Missoura
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Post by phatmanxxl on Sept 29, 2016 20:39:03 GMT -5
1. No
2. No
The pod filter is clean.
OK, I did put some premetex on the intake to make a better gasket.
Could be. It idles great where the A/F screw is.
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Post by humanshield on Sept 29, 2016 20:59:40 GMT -5
Sounds to me one of two things.....
Your new carburetor has a problem...or you connected a hose wrong.
CAREFULLY check the rubber diaphragm underneath the two screws on top of the carburetor. There may be a small, hard to see crack in the diaphragm.
You might be able to use the diaphragm from the old carburetor if so.
Or, you used too much permatex and it flowed into the intake tract (doubtful, but possible)
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Deleted
Deleted Member
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Post by Deleted on Sept 29, 2016 21:08:28 GMT -5
I was thinking about a ripped diaphragm also. It would only take a tiny slit to let air through.
Bill
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Post by humanshield on Sept 29, 2016 21:24:51 GMT -5
I was thinking about a ripped diaphragm also. It would only take a tiny slit to let air through. Bill Yes, and that could cause surging like that. I suspect something like this especially since it's a new carburetor and didnt do it before |
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phatmanxxl
Scoot Enthusiast
Posts: 484
Location: Missoura
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Post by phatmanxxl on Sept 29, 2016 21:48:36 GMT -5
Sounds to me one of two things..... Your new carburetor has a problem...or you connected a hose wrong. CAREFULLY check the rubber diaphragm underneath the two screws on top of the carburetor. There may be a small, hard to see crack in the diaphragm. You might be able to use the diaphragm from the old carburetor if so. Or, you used too much permatex and it flowed into the intake tract (doubtful, but possible) I gave it about 5 hours to dry, I'll check the diaphragm tomorrow too thanks fellas. |
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phatmanxxl
Scoot Enthusiast
Posts: 484
Location: Missoura
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Post by phatmanxxl on Sept 30, 2016 11:33:45 GMT -5
Diaphragm looked good, I harvested the parts I needed off the new carb and put them on the old one and gave it a good cleaning. Valve lash was way off (of course) problem solved. Runs like a baby beast now.
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Post by humanshield on Sept 30, 2016 17:13:59 GMT -5
Odd that it only did it after you changed the carb if it was valve lash. Always learning something new Glad you got it fixed  |
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phatmanxxl
Scoot Enthusiast
Posts: 484
Location: Missoura
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Post by phatmanxxl on Sept 30, 2016 17:39:23 GMT -5
Odd that it only did it after you changed the carb if it was valve lash. Always learning something new Glad you got it fixed Probably part of the problem, the carb was doing the bogging for some reason. |
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Post by renagade281 on Oct 1, 2016 15:17:01 GMT -5
If u installed a new air filter then that's probably the problem. It sounds like too much air.
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