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Ultegra STI sticking Question(6 posts)

Ultegra STI sticking QuestionWheelsuker
Mar 11, 2002 12:01 PM
Hey there, long time listener, first time callerr.....ooops, sorry, wrong thread. Anyway, I have my Litespeed in the garage of my Northern Michigan home, where I ride rollers in the frigid cold. Both the left and right shifter have been really sticky....very poor shifting performance. This stuff is OEM from 1994-5. The STI stuff has never been serviced, to speak of, just switch out cables/housing/chain and cassette when required or annually. Has anyone ever soaked their STI's in a solvent, say Simple Green? Any other suggestions? Gotta get the stuff clean...roads are becoming free from snow!!!

re: Ultegra STI sticking Questionmwood
Mar 11, 2002 4:51 PM
I've given sticky STI's a shot of WD40. The solvent component loosens up the old, coagulated grease and the oil properties lubricate.
Easy way firstKerry
Mar 11, 2002 4:54 PM
Easiest thing to do is sluice it out with something like WD-40, and then chase that with TriFlow, shifting all the time you're doing this. This is easiest because you have an aerosol with very low viscosity that can get into every nook and cranny. If you want to soak them, that will work too, but you need to be working the mechanism as well, so that can get a little sloppy. Anyway, be sure to lube after you get the solvent out. If this doesn't work (assuming you have clean, unkinked, burr-free cables, and clean and lubed derailleurs), then there's "no user-serviceable parts inside" and you may be looking at a replacement. A hopeful sign is that if they worked OK last summer, then it's probably just an artifact of that 6 deg. F air you had last night.
re: Ultegra STI sticking Questionsamcat
Mar 11, 2002 5:54 PM
Cold will hinder movement of the levers...slow them and make shifting seem "off". When coupled with a few years of accumulated gunk, formerly crisp shifting can really degrade.

Suggest the following:
• Bring the bike in from the cold and see what happens at room temperature.
• Spray copious quantities of WD40 into the levers from all sides; wait 15 minutes and blow out the gunk with compressed air. Repeat a couple of times.

Should do the trick...

Good luck!

...then lightly lube w/Tri flow (nm)samcat
Mar 11, 2002 5:58 PM
re: Ultegra STI sticking QuestionChen2
Mar 12, 2002 6:57 AM
I don't know, could be wrong, but this sounds more like a cable routing issue.