Question about Shimano Xtr Mountain Bike Dual Control Brake/Shift Levers

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I have Shimano EF-50 7sp Rapid Fire shifters on my Diamondback. The thumb levers shift OK but no longer return all the way to the start position. The bike has about 700 miles and two years on it. Can this be adjusted or are the shifters wearing out?

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6ya6ya
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Posted on Jan 02, 2017

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  • 18 Answers

SOURCE: Shimano st 7900 shifter,left lever apart and how to reassemble

You can download an exploded diagram of the 7900 series STI shifters here:

http://techdocs.shimano.com/media/techdocs/content/cycle/EV/bikecomponents/ST/EV-ST-7900-2874E_v1_m56577569830670749.pdf

You can reassemble them according to this diagram.

Posted on Jul 07, 2009

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  • 636 Answers

SOURCE: shimano 70gs rear derailleur won't shift. The

Is the cable still attached ? have you tried adjusting the cable?

Posted on Jul 26, 2009

  • 170 Answers

SOURCE: My Shimano Alvio 3-speed front shifter has

rough guess, from past life of bmx.
there should be a cable that runs down to the mechanism, the cable is secured by a small nut, loosen the nut and pull the cable a little more out of the nut with pliers. tighten the nut, and try the linkage.
the shift cable stretches over time and your actually gonna make a small adjustment to compensate for the stretch. by just pulling the cable thru the locking nut to make it shorter.

Posted on Jul 31, 2010

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1 Answer

How do I switch gears have a nishiki manitoba 500 series has two shiffters on each side?


the shifter pod on the right is for the rear derailleur and the shifter pod on the left is for the front derailleur. There are usually two shift levers on each pod. Some you actuate with just your thumb, others you use your thumb and forefinger. Generally the larger of the two levers is to move the chain onto a larger size gear cog, one click of the lever equals one gear. Use the smaller of the two levers to return the derailleur, one click equals one gear. This is assuming the cables are adjusted properly, if the cables are not adjusted properly then you won't get a nice "one click = one gear" shift response and you should take your bike to your LBS (local bike shop) for a tune up, or watch some YouTube videos on how to do it and practice.

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How do sti shifters work?


there is a gear mechanism inside the shifter that uses a 2:1 ratio and is synced with the spacing of the rear cogs and the width of the chain. You cannot use a 9 or 10 speed rear shifter with 7 or 8 cog gear cluster. They are all integrated. You cannot use a SRAM shifter with Shimano gears, the ratio's are different (as a general rule of thumb, there are exceptions, but why mess with it?) Just remember that the shift, chain and rear cogs all need to be compatible and your drivetrain will work.

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How to replace cable in vintage shimano XT Deore SL M740 rear shifter...there is no feed hole as with most other shifters


on some of the old stuff there was a small plastic plug screw, Phillips head, near where the shift levers enter the pod. Once that is removed and the shifter is in smallest cog position you will be able to sight through that access hole and see daylight and can fish the cable through it. Hope that helps.

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Shimano 200GS STI, upshift lever moves freely but when released, it returns the derailluer back to the lowest gear. How do you take the shifter apart?


"Upshift lever" could be either one since they both shift up or down.

I'd make sure it's a lever problem before embarking on that project. Is the cable actually being controlled by the lever?

A simple web search for "Shimano 200GS STI assembly" yields all kinds of resources.

Another good start would be http://www.shimano.com/

Other web searches like "how to.." work, too.

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1 Answer

My Shimano Alvio 3-speed front shifter has


rough guess, from past life of bmx.
there should be a cable that runs down to the mechanism, the cable is secured by a small nut, loosen the nut and pull the cable a little more out of the nut with pliers. tighten the nut, and try the linkage.
the shift cable stretches over time and your actually gonna make a small adjustment to compensate for the stretch. by just pulling the cable thru the locking nut to make it shorter.

Jul 31, 2010 | Mountain Shimano Alivio Front Bike...

1 Answer

New shifters for deore xt x7 delrailer


Shimano make an "EZ fire" which is an integrated shifter/brake lever combination and cheaper than buying seperate shifters and levers.


e.g.
http://www.tredz.co.uk/.Shimano-Acera-8-Speed-EZ-Fire-ShiftersBrake-Lever_24339.htm


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1 Answer

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Hi log onto shimano.com and you will find what you are looking for

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4 Answers

Deore dx shifter stops working


had the same problem, didn't use my bike for longer period. open the shift lever carefully and try something like caramba. worked for me.
sebastian

Sep 07, 2009 | Shimano Deore Xt Thumb Shifters 7...

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