Bad CV carburetor

[ncsteve]

OK long story short. 98 Lowrider 1340 started running ragged at any steady speed. I replaced plugs,wires,coil, rebuilt the carb, drained gas(twice), replaced fuel line, petcock and cleaned the K&N air filter thoroughly. When I put new plugs in it, it runs great for about 30 miles then does the same thing! Fouls the plugs with gas not oil. They are smut black and dry.
I finally threw in the towel and took it to a local shop. He kept the bike for 2 weeks, then called and said it was fixed. 25 miles later, same thing. I marked the bolts on the air cleaner when I put everything back together the last time to see what the shop would check. Nothing has moved except they changed the plugs. When I called to tell them it wan't fixed, they said the carb was bad and needed replacing. Do the carbs go bad or do they just need rejetting? Thanks.....................

[nmaineron]

You may not have a carb issue at all.Sounds like your ignition module or pick-up may be going away.

[baggersport]

Is the carb. modified at all? Is the idle mixture plug removed? If so, what's it set at? How'bout the float level/ condition of the float mounting pin in the carb. body?





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[Antonio Pendejo]

There is a little tiny o-ring under the idle mix screw. If this o-ring is displaced it will cause the symptoms you describe.
AP

[ncsteve]

Right on the money Antonio!! The whole thing was the idle mixture screw kept backing out. I replaced the spring and o-ring and Tah-Dah......runs like a champ!! Sorry it took so long to get back here.............Thanks!!!!!!!!!!