bike is 2001 with 3000 miles on it, rebuild the carb with a $20 kit off of amazon (probably not the best kit) and when I give it just a touch of throttle when starting st stoplights it will die down a bit until it gets more gas then the RPMs pick up back to normal. What could be the cause of this issue. The only think I could not replace in the carb was the fill valve due too the acre being corroded and stripping real easy.

Thanks Batman, I ordered new jets from a separate website. The kit only came with the puppet jets and not the mains. So I’ll give those a try.

Thanks Gary, I have the adjuster screw as far in as it will go. I have also done the half spacer mod on the needle. Should I try to put the old pilot jets back in to see if that will work better?

The bike sat with a full gas tank for atleast 2 years, before that I’m not sure if it was stored properly. Before I “rebuilt” it, gas was coming out of the vent tubes. I replaced the slide needle and that issue was resolved. While I had it apart I also replaced the jets that came with the kit and I saved the old ones. And I did not change anything with the float. The screw that holds everything down was too messed up.

This is my first bike and my first time really messing with carbs.

TheBrendan312 wrote on 08/15/19 at 07:22:08:
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If fuel was coming out of the vent hoses then you float needle was probably stuck.  Sometimes tapping the side of the carb with the handle of a screwdriver or getting the bike started with the fuel turned off is enough to clear the problem.  

You should also make sure that your fuel petcock is not faulty and there is no gas mixed in with your oil.

Lastly, when this kind of crap happens, it is NOT the time to do a white spacer or change anything to do with jetting.  You really want to try and get this bike running properly with the same settings it has.  Someone put 3k miles on so it should run decently well with what was in there.  You just want to solve the fuel overflow issue and get it running.  Once running, then you can determine if you need to do any tuning.

batman wrote on 08/15/19 at 08:34:28:


When I unscrew it, it seemed like it was running too rich and flooding. Could the issue be that the pilot jet is already too large?

I would compare the new needle with the old one. I have had the jet kits come with completely wrong needles.  Looks new and nice, but totally the incorrect taper.

Do you know if this bike was running properly before it was parked for a couple of years?

Which needle did you actually replace?
The slide needle is the long needle that is in the slide which is accessed from the top of the carb.  You might have removed it when you did the white spacer mod.

The float needle is in the bottom of the carb.  You would have needed to remove the pin that holds the floats in place and float to replace it.  That would solve the fuel overflow issue.

So you replaced the two jets in the bottom?
If so, you want to get back to stock sizes or whatever sizes came out.  

Did you remove the two jets from the top of the carb?  
If so, you should put the stock jets back in.  

You should write down and confirm that you are using the proper size jets in each spot just in case someone changed it before you got there.

I would remove the white spacer mod until you get it running properly. You may or may not need it, but let's start by getting the bike operational.   Make sure the slide is clean and the diaphragm is properly seated.  

This is not a tuning issue so ignore the stupid low-speed adjustment.  It wouldn't cause this issue by itself.