Idle Question

[unicorncomputer]

After pulling my carbs to be cleaned for the second time this riding season, I am having an Idle problem.

The bike idles very high, around 2000 rpm,
if I turn it down just a hair, it idles about 800-900 then stalls.

Turn it back up ever so slightly and back to the 2000 rpm idle.

Any ideas?

Thank you,

Steve

[BA80]

Have you synced the carbs?

[jwhughes3]

After cleaning did you bench synch first before vacuum synching?

John

[motoman]

After cleaning did you bench synch first before vacuum synching?

John

Gettin' abit ahead of yourself there John....

His idle/pilot circuit is NOT clean as he may think.

[unicorncomputer]

Which part is the idle/pilot circuit?

I had bench synced and vac synched them the first time I did them this year, but not the second time.

Second time I was being very careful to not move or change anything.

[cajun31]

Uni

Check out this video keeping in mind this is a generic CV bank of carbs and not specifically those for the xs11. Most of the parts are however the same.

https://www.youtube.com/watch?v=95nlrP-yn2I

You may also want to look in the maintenance section for additional information and pictures explaining the different jets and what they do.

[BA80]

Which part is the idle/pilot circuit?

I had bench synced and vac synched them the first time I did them this year, but not the second time.

Second time I was being very careful to not move or change anything.

TC just posted this the other day and could be of help also.

http://www.xs11.com/forum/showthread.php?t=42622

[WMarshy]

I'll beat motoman to it... I think your issue might be secondary ignition issues. you better disassemble the entire electrical system and clean every comnection before proceeding.

[motoman]

I'll beat motoman to it... I think your issue might be secondary ignition issues. you better disassemble the entire electrical system and clean every comnection before proceeding.

May wanna' re-read post #1.

[unicorncomputer]

Would running seafoam or MMO for a bit have any effect or is it necessary to remove and clean carbs?

Thank you,

Steve

[cajun31]

Certainly

won't hurt anything. The key to the seafoam is to allow it time to do it's job. I put it in with a very strong mix... about 1/3 tank of gas then add the seafoam and run the bike to make sure you get a good dose in the carbs. Let it sit over night in the carbs then run the bike again.... use up that tank then add gas. That sometimes does the trick to get some of the less obtrusive crap out of the system, however if you have a substantial varnish buildup in the pilot jets then the only way to clean them is to physically take them out and inspect clean. The key is to not make the holes in the jets any larger. I always get the sewing needles out and probe the holes with those being careful as you proceed. Of course I soak the jets in a good bath of carb cleaner before doing this.

[motoman]

won't hurt anything. The key to the seafoam is to allow it time to do it's job. I put it in with a very strong mix... about 1/3 tank of gas then add the seafoam and run the bike to make sure you get a good dose in the carbs. Let it sit over night in the carbs then run the bike again.... use up that tank then add gas. That sometimes does the trick to get some of the less obtrusive crap out of the system, however if you have a substantial varnish buildup in the pilot jets then the only way to clean them is to physically take them out and inspect clean. The key is to not make the holes in the jets any larger. I always get the sewing needles out and probe the holes with those being careful as you proceed. Of course I soak the jets in a good bath of carb cleaner before doing this.

Toothpic is your best bet cleanin' those little sideholes of the pilots, plus it picks up any of that build up on the shoulders of the teeny holes.

[unicorncomputer]

I ended up running some seafoam through, let it set for a couple of days.
Started the bike, got it warmed up but still wouldn't idle right.

Put about 1.5 ounces of MMO in, let it run a bit, then took the bike out for a ride.

Upon returning from 20 minute ride, the bike was idling properly and has been for about a week now.

Thank you all for you helpful diagnosis.

[skids]

tune-up in a can. You can't beat that!

[skids]

Toothpic is your best bet cleanin' those little sideholes of the pilots, plus it picks up any of that build up on the shoulders of the teeny holes.

Now, I though we just went down that road. The side holes in the pilot jets do nothing in an xs11.