gear indexing

jeannot18

I have been looking online but I can't really find a solution to my problem. I had a new back derailleur fitted (x9) on my RR 8.1.It was working ok but now I am not able to select the last cog (not that I use it that much), I go to the last click on the gear shifter (so no more click left), but the chain stops just before the last cog (smallest one) and don't shift over. What do I need to adjust to fix that problem.Is it a cable tension problem? (I did turn the wheel at the lever, but that did not work),or shall I play with the screws on the derailleur? I hope that I made myself clear...

JC

nicklouse

read the setup info on park tools and download the info from srams webby.

yes you need to set the stop screws. and maybe adjust the tension.

delete_my_account

If you mean NEW new then it probably won't be this, but if you mean second hand new then it could be.

X9 rear mechs sometimes have the rivets which hold it together, too tight, meaning that the spring isn't strong enough to pull it to the highest gear.

I had the same problem, I doused all of the joints in 3in1 and then cycled up and down the gears with the shifter, with the chain off. It's better but not perfect.

cooldad

Or cruddy cables if it won't return to the smallest cog and was working fine before.

jeannot18

Thanks for that, I can upload the parktool website for the moment (?).I have downloaded the SRAM pdf files, quite a lot of into there! The X9 is brand new. I may have a got with stop screws, and see if I can get it sorted.
JC

jeannot18

I had a go a it, it still won't change to the last cog, but if I pedal backward, the back derailleur moves back (not tension - hopes it makes sense) and when I change to forward pedalling the chain jumps to the last cog! I will take the bike back to the workshop, something is not right and it is beyond my mechanical bike skill :roll: .
JC

mrmonkfinger

sounds like dirty cables

nicklouse

jeannot18 wrote:

I had a go a it, it still won't change to the last cog, but if I pedal backward, the back derailleur moves back (not tension - hopes it makes sense) and when I change to forward pedalling the chain jumps to the last cog! I will take the bike back to the workshop, something is not right and it is beyond my mechanical bike skill :roll: .
JC

so disconect the cables. set the low screw. attach cable add tension till it moves up smothly. set top stop screw. Use.

ilovedirt

Read the instructions that came with the mech and follow them word for word.

jeannot18

nicklouse wrote:

jeannot18 wrote:

I had a go a it, it still won't change to the last cog, but if I pedal backward, the back derailleur moves back (not tension - hopes it makes sense) and when I change to forward pedalling the chain jumps to the last cog! I will take the bike back to the workshop, something is not right and it is beyond my mechanical bike skill :roll: .
JC

so disconect the cables. set the low screw. attach cable add tension till it moves up smothly. set top stop screw. Use.

What chainring shall I use at the front? It's a triple.Thanks
JC

cooldad

The middle one.

jeannot18

cooldad wrote:

The middle one.

Thanks!

I found this video, but he did not mention anything about the chainring (thus it looks like that the bike has only one)

http://www.pinkbike.com/news/tech-tuesd ... -2010.html

JC

jeannot18

Think I have done it. I can switch to all the gears now. It may not be as smooth as I would like but it would do for now. Reattaching the cable is a bitch though!
JC