Installed stage 1 kit....

The only difference that i see is now i have white smoke coming out of the front cylinder exhaust on idle.still stumbles OFF idle and misses at 1/4 throttle "highway speeds".I have:replaced tank strainer,5/16 fuel line,checked float level,replaced vacuum piston,inspected accelerator pump,checked for intake leaks,used '42,44,45, pilot jet,170,175 main and lastly installed the stage 1 kit...no difference..Oh,and previously "washered" the previous needle to no avail..Does a carbureted HD ever truly run correctly?

As previously mentioned.

I just DONT understand.for 2 1/2 months i have had the carb off about 10 times (no exaggeration) replaced everything that was even remotely questionable to specs and tweaked and tuned to no success.

Could be something beside the carburetor and Yes most run very good.

What kit did you throw in it? - With a washer under the needle it sounds like it wasn't one of Kens.

previously mentioned as in stumbling off idle and missing at highway speed.I replaced all internal components (with stock components) that i found to be in question.Same result.Added the stage 1 kit per instruction.Same result.I am in no way defaming the cvp kit in no way shape or form-the frustration is the fact that NO ONE has been able to fix or tell me what is wrong with my motorcycle.

Wasnt a kit bro-just a "trick" to allow more fuel flow through the carb regardless of throttle position.Hence trying to correct a lean condition.

I havent intermixed any parts.only stock components with the stage 1. no other kits have i purchased.I just need to discover the "missing link"

Could you tell us a little more about the bike? Is it an 883, 1200, What? How long have you had the bike? Are you the original owner?

I have a 96 Sportster 883 but changed it to a 1200. When I first got it, I too had a stumble problem on idle. I learned that I had a stuck acc. pump, so that was replaced.

Did you pull the plugs to see what they looked like? If they are black, that is an indicator of a rich fuel mixture. If they are really white, this is an indicator on a lean fuel mixture. I like to see my plugs at a light gray.

I just recently brought my bike into the shop to have my carb gone through. I had some idle issues and popping, which I thought was coming out of the exhaust, but turned out to be coming out of my intake (which is not stock). After going through the carb, we discovered a couple of things.

Here are the Mods that I did.

1. 883 upgraded to a 1200 with 10.0:1 Compression
2. Different pipes
3. D&M Spike series Air Cleaner

First problem that we found was that the pilot jet was a 44. Stock is 42. We also discovered that my idle mixture screw was 8 1/2 turns out. This is way way too much.

Solution: We installed a 46 pilot jet, and simply readjusted the idle mixture screw to about 2 1/2 turns out. Now my bike starts better than it ever did, and my popping has gone away. How much gas are you giving your bike before start up? I would always give two rolls, now I only give one because I increased the pilot.

Full operating temp-vapor dissapates quickly-2 turns out-and no washer under the needle since installing the cvp kit.

I guess I am curious as to why we are only talking about the carb? Could it be that the ignition could be off, (Coil starting to go bad, or is bad)? I would start checking plugs, wires and other connections.