[Closed] XTR M970 Front shifter issues?

Yep, mine died recently. A quick strip down and regrease availed nothing, so it's moved on to the big parts bin in the sky and a shiny new Saint shifter now adorns the bars.

I had put this down to some possible crash damage - you've got me worried now, as I have these on another bike also.

I've not crashed either bike so I think there may be a worn part inside?

Could be. On my unit the release lever basically didn't - it just flopped about but would then spontaneously re-engage and drop the chain down a ring. Put up with this erratic performance for months, then stripped it down for a looksee. To be honest, there really wasn't that much to see, and my inclination to investigate further was very low (inclination is proportional to temperature, and it was cold). Anyway, slapped some grease about and managed to achieve precisely nothing.

Have a go - you've nothing to lose... except perhaps an eye, there's a powerful spring in there somewhere.

I've done the same as you. took it apart, saw nothing wrong then rebuilt to get the same performance as before, pish all!!

Ta

Sorry, wasn't much help there. Must do better next time...

No worries, you did confirm that is not just me!!

Sounds daft I know but have you checked the wire isn't kinked in the shifter? Try a new wire, I've seen a few shimano shifters with that issue, usually ones with old corroded wires, which I suspect your bike hasn't 🙂

Cheers Ziggy, both bikes have new cables!

Hey i know how you can solve that issue 😆

Did you ever find that nipple that broke off at CYB ?

Maybe there is some trail pasty inside ?

Its not your techinacal prowess thats lacking of that i'm sure.Do you know how to operate said shifters maybe you just plian forgot 🙂

Did you ever find that nipple that broke off at CYB ?

Its not your techinacal prowess thats lacking of that i'm sure.Do you know how to operate said shifters maybe you just plian forgot

Yup thats on the Maverick KOS, the blue IF has the bigger issue and thats never broken!

****, they don't operate by themselves? Bummer!

I've had one shifter go like this, handily it decided to do it both times while I was racing, ended up being stuck in the big ring.

Shifter got moved to the training bike, and oddly hasn't been a problem since.

Not come across it on XTR before, but have found other shifters with a sticky pivot on the spring loaded release pawl. A drop of GT85 and a bit of wiggling of the pawl freed them off, shifting back to normal.May not be your problem, but worth a look.

Probably what coatsey said^^^
I love fixing them like this when my boss is saying "No! Replace them! The customer WANTS new ones."

Yep my right hand shifter did this a couple of times but rectified itself, my left hand one shifts fine with the thumb (up and down shifts) but using the finger shift (conventional) nothing happens.

2 things I can come up with as I have these shifters is:

1. Your outers/inners are stuffed and need replacing - shifting down require the rear mech return spring to overcome the friction in the cable system. If this is too great it wont shift properly.

2. The cables inside the shifters have become bent and foul inside the shifters.

3. Shifter springs have gone.

4. Shifter mech is sticky/fouled up as about GT85 soaking 🙂

Shifters are poss servicable if anything inside is broke like springs 🙂 Also a friends bike had some 8 spd sram shifters and would click shift down but cable was too grotty and the rear mech wouldn't shift.

Edit - sounds like you have new cables oops - have you replaced the outers though?

probably some bits of cheese in there grommit

Solved my problems by changing the cables.
Periodically.
Now we have smooth sfifting across all 3x XTR front mech's.

Ha ha ha ha.

Fatbloke's got shifters on his bike.

Hope that helped. 😀

Yes thats solved the problem, thanks for that stu 🙄

Yes thats solved the problem, thanks for that stu

Think nothing off it. 8)

Probably forgot to fit the mech on! 😆

Sorry.

Stu says nothing all week then BAM !