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STI shifter maintenance?(5 posts)

STI shifter maintenance?mlbd
Apr 19, 2002 3:10 AM
I've got Ultegra shifters--less than a year old with about 1300 miles to them. The right shifter has started to stick a bit. It just gets stuck and won't budge until i jiggle a bit. it can happen both in up and down shifting. it's as if something is mechanically out of place blocking the movement of lever. i gave it a bit of teflon lube to see if that would help (no verdict yet). is this a commone problem? is there something else i can do to prevent it? thanks.
re: STI shifter maintenance?justina
Apr 19, 2002 5:21 AM
I had this happen with my 105 STI's, whole right lever would stick up. Unfortunately Shimano STI's are not rebuildable (one reason I ride Campy now). They're disposable, so when they stop functioning well you have to spend $200 on new STI's instead of $20 on new bearings or springs. There may be some grit in there, you can bang and jiggle the levers with the hoods pulled back to shake debris out. Lube, as you tried, is the only other course of action. Keeping my 105's well lubed did the trick for me, still working on my backup bike. If that doesn't help hope they're still under warranty. If not Chuckbikes.com has some brand new Dura Ace 9sp STI's for about $180. Pretty good deal for DA, Ultegra's only a little less.
Sounds like ultegra.Sintesi
Apr 19, 2002 5:29 AM
I had this problem and it gets worse as time goes on. Not sure what causes it, either the ratchet parts wear down w/ use or the screws are coming loose. Lube didn't seem to help much. There are two screws you can check. First one is under the plastic cap on top, if you look closely there's a little gap you can slip a thin screwdriver into to pop it off. Just be careful because if it breaks your stuck with an ugly lever. The other screw is on the back side of the brake/shifter levers. Commonly, this guy fallS out on the right side. If it's gone you need a metric #4 4mm X 8mm machine screw to replace it (props to Bear).

Best fix is to ride them till they break and replace w/ Dura-Ace.
re: What about 2 year warranty?Rusty Coggs
Apr 19, 2002 5:34 AM
mn
Run thin spray-lube through them...Gregory Taylor
Apr 19, 2002 6:03 AM
... and see what you flush out. Take the cable out (or loosen it up and pull it away from the shifter) and spray into where the cable feeds into the shifter.