Join Date: Jul 2002
Location: Oxford, UK or Mountain View, Ca
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Don't be put off by unhelpful comments - there is nothing wrong with Sora, I have the miles to prove it
As I believe the earlier replies mentioned, the problem is that the cable adjustment is incorrect, so that the indexing position (the gear selected) at the shifter is out of step with the position of the derailleur on the sprockets by one position. The Parktool website is a very good place to start. This is a pretty easy job to straighten out and is an area that all derailleur bikes require a little bit of attention every now and again.
Heres a quick guide, if things are not too messed up and the two cross-head high and low movement limiting screws on the derailleur have not been adjusted. Note, it helps to look vertically down at the derailleur & sprockets to check their alignment with respect to each other.
Step 1: Shift the shifter until the deraileur is all the way out to the smallest sprocket (run the pedals round to allow things to move) and there are no more clicks i.e. highest gear setting. Dont worry if the derailleur doesn't go all the way but be sure to get all the clicks at the shifter - this is our reference point for the setup.
Step 2: Adjust the the cable's barrel adjuster untill the smallest sprocket can be engaged. If the derailleur won't move, and the cable is noticably slack the adjust the "high" limit adjustment screw until the derailleur allows the chain onto the smallest sproket. Adjust cable tension so that one click of the shifter takes the chain up to the next sprocket. Now we should have Shifter and derailleur on the same setting.
Step 3: Check the shifting up and then down through all gears, one by one, before attempting to ride. Make sure you can get all gears at each respective shifter click. Be sure that the shift to the largest sprocket cannot force the chain off between gears and spokes - this will cause total destruction of the derailleur, as I found out once
. If it does, reset the "Low" limit screw on the derailleur body so that the large sprocket can be engaged, but the system cannot move too far to the left.
That description probably makes the process sound harder than it is!
Good luck, hope that helps,
Get a bicycle. You will certainly not regret it, if you live.
Last edited by Ed Holland; 01-30-06 at 01:36 PM.