Honda XR100R: Idle Not Found

[Garandman]

We have an old (1994, I think) XR100R that starts well and runs well. But it will not idle even after warmup.

It will run at the half-choke setting, albeit with elevated idle speed. Fuel is good, even added some conditioner a while ago.

Is there a maintenance manual on line or should I buy a Chilton or something else?

It looks like there is a screw at the bottom of the carb that might be a drain? Not sure where to start - haven't owned a carbed bike for more than five years. I bought one of those HF ultrasonic tanks so if I have to remove it and clean it, I have a fighting chance.

Any good maintenance websites?

[Garandman]

Update, found some carb cleaning videos on youtube.

[Degsy]

Wirelessly posted

Its the pilot jet. Take it out and clean it in the US cleaner.

[Garandman]

That was easy. Took the carb off and it appears to be a replacement: doesn't look like something 20 years old. Took the jets out and put them in the [Harbor Freight Ultrasonic] cleaner for about five minutes. Put it all back together and it starts first kick and idles nicely.

This is the video I watched: there are many as it turns out. About as easy a maintenance as there is.

[Kitt]

What do you mean put the jets "in" the cleaner? If there's an easier way, tell me! I usually spray them down with carb cleaner and then make sure there is no blockage with a piece of safety wire.

[breakdirt916]

Maybe meant an ultrasonic cleaner?

Regardless, XR100's (among many single carb thumpers) are the easiest to clean and tune...I sure do excited when I go to look at one and the previous owner lowers the price since the bike won't idle, and he keeps the choke on halfway to keep it running...

[Garandman]

What do you mean put the jets "in" the cleaner? /.

NESR approved ultrasonic tank.

http://www.nestreetriders.com/forum/...-gotta-get-one!

[gregp]

The low speed jet on an XR100 is so small that, more than likely, a piece of safety wire will not go through it. I usually have to clip one strand off of a fine brass or steel brush. The hole in those things is *tiny*.

[nhbubba]

What did you use for cleaning solvent? Simple green?

[Sheppo]

The low speed jet on an XR100 is so small that, more than likely, a piece of safety wire will not go through it. I usually have to clip one strand off of a fine brass or steel brush. The hole in those things is *tiny*.

also try a twist tie off a loaf of bread...

[Garandman]

What did you use for cleaning solvent? Simple green?

The cleaner HF sells with it. You use a 1/4 teaspoon. Whatever it was worked, I could see the inky stuff coming off almost as soon as I started it.

[Stromper]

Add a lawnmower paper element fuel filter for happiness

pilot jets clog with micromicro grit