I'm not quite sure what this part is..can anyone help me out? I'm sure It's something stupid or simple. Also, how can you or can you remove this part? I'm trying to clean out my 07 Klx250 carb and I can't see anything through this specific brass passage...any ideas? Thanks.

 

Looks like the starter jet. Some people drill them a little larger to help starting. It is not easily removed, use a fine wire to clear the opening and blast it with carb cleaner.

 

Thank you!!! It was clogged when I had the carb disassembled, but I didn't realize this was a jet. Would it be safe to remove this with needle nose pliers? I suspect this would be the culprit for my bike running at ~4000 rpm with the choke on, and dieing when the choke is off.

 

I think the starter jet is pressed in, I could be wrong but I don't think you'd want to remove it. Today was my first time ever opening a carb.. hell a bike for that matter so hopefully someone with a bit more knowledge will help answer .

Paul

 

Thanks, I thought maybe it was screwed in?

 

The starter jet only flows fuel when the choke is pulled out. If your bike won't run off choke then your pilot jet may be clogged.

 

"If your bike won't run off choke then your pilot jet may be clogged."

This is my thought too. The pilot jet can be cleaned with carb cleaner and compressed air. When you hold it up to a bright light, you should be able to see through it.

Tom

 

Don't try to remove that starter jet with pliers or anything. It might be possible, there's no reason to try. It will clean up just fine with some spray carb cleaner like Chemtool B12 and some compressed air. It's a bigger hole than many of the pilot jets, so cleaning it in place works fine. The pilot jet on the other hand sometimes even requires running a fine wire through it some cases where fuel has really varnished up into a clot. If you have to use the wire, try to use a brass bristle brush wire instead of steel...or at least be careful not to scratch up the pilot hole in the jet because it is brass and somewhat soft. Letting the brass pilot jet soak in some carb cleaner overnight usually gets the blockage out with some compressed air in most all cases.

 

Just a tip......

I've rebult many an old bike....many old carbs a completely clogged up.
One trick used is to heat up a guitar string to melt out any old varnish.

 

+1 on the guitar string! The beautiful thing about guitar strings is that they are rated by gauge so you'll be able to match the size of the string to the jet without risk of damaging it.