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Bad shifting - another thing to check for..(5 posts)

Bad shifting - another thing to check for..TFerguson
Sep 17, 2003 3:29 PM
Put the bike on the stand and adjust the shifting to perfection. Go for a ride and a little while out and it starts missing shifts, front and rear. Adjust the down tube adjusters and in a little while the shifting is bad again. I'm blaming everything. Sunday, after fighting it for 50 miles, I take it back into the basement, put it on the stand and try to figure out, once again, what's wrong. It will barely go up to the big ring and won't go to the largest cog. Ok, both are too slack. I start with the front end and look at the down tube adjustor. It's all the way in. Why would my adjustment on the road have turned it all the way in when the cables are too slack? I turn the adjuster out until it starts to shift again and notice that every time I turn the front wheel from right to left, the housing moves enough in the adjuster to screw it back in about a quarter of a turn. 10 times back and forth with the bar and the adjuster is all the way in again. I check the right side and it does the same thing.

I put a dab of locktite and the adjustor threads, wait till it dries and break it loose. They now turn quite hard. Tune it up and take it out yesterday for 80 miles of perfect shifting. I've been fighting this for months and finally found it.

TF
re: Bad shifting - another thing to check for..edmundtan
Sep 17, 2003 6:14 PM
Sounds like the barrel adjuster screw threads are worn and slipping. Try replacing them.
Glad you found it!the bull
Sep 17, 2003 6:37 PM
Another thing that puzzled me once was a loose BB plastic cable gluide. It was moving around and messing with the tension of the cables.
re: Bad shifting - another thing to check for..mackgoo
Sep 19, 2003 6:49 AM
Are the springs there?
Yes, the springs are there. (nm)TFerguson
Sep 19, 2003 9:03 AM