idles rough....bogs at any throttle below 4000

[ScottsXS]

please help my xs is not running so hot, cold .....runs nice and smooth full choke fires right up the whole chebang, partial choke starts running a little rough but still decent, no choke barley idles any throttle it bogs hard till it winds up about 4500-5000 then smooths out becomes very responsive. its very hard to ride a bike that does this some one please give me some ideas

[randy]

Your pilot jets are dirty. Time for a carb cleaning,

[John]

What he said.

[Pat Kelly]

My E is doing that. I checked my pilot jets and they are clean.
From the popping I get at idle when warm from the left muffler (Jardine spagetti pipes) I think I have a 'too tight' exhaust valve and it's time for a valve adjustment. Another symptom that leads me to this is my lack of 'engine braking'. RPMs don't drop back to idle as they should.
Anyone have an assortment of shims for swapping?
I remember awhile back someone made a spreadsheet that made figuring shim sizes easy. I downloaded it to my old computer that my son now uses. Had to reformat that harddrive.

[TopCatGr58]

Hey Scott,

Ditto on the Pilot jet circuit, however, you could first try a good dose of SeaFoam cleaner in a tankful of gas. Use several times the amount they recommend for routine cleaning. Might get it back to manageable driving till warmer climes would allow and easier time for a proper carb disassembly and cleaning!?
T.C.

[randy]

Pat Kelly;

Hanging high idle and popping are classic lean condition symptoms. Have you done any re-jetting to compensate for the Jardine's?

[Pat Kelly]

Yes, the bike ran perfectly for a couple of years as it is currently configured. One morning it woke-up with a cold and hasn't felt well since.