Rear Derailleur (dura ace 7401) shifting issue...2nd to 3rd gear...
08-19-13, 10:38 PM
#26
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08-20-13, 05:22 AM
#27
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I could be way off here as I'm no expert but are there 2 different ways that the cable can be routed to the cable clamp bolt on the RD. I seem to recall something like that with the 7400 or 7401 which made a difference to the indexing.
08-20-13, 08:53 AM
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I'm not saying this is the probelm but it hleps to rule out some of the basics....
How's your chain length? I'm going to venture a guess and say it's too short. After you turn 'out' the 'b' screw shift it into small/small and post another side pic.
08-20-13, 10:20 AM
#29
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i think you might be right, i might have heard that before...i just went with what looked correct to me (ie cable laying in that specific groove) but ill look at that as well
08-20-13, 10:23 AM
#30
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'Out'. The objective is to bring the jockey wheels as close to the teeth as possible. If the upper jockey wheel hangs up on the largest cog when shifting to the next largest cog turn the 'b' screw 'in' to pull the jockey wheel away from the cog.
I'm not saying this is the probelm but it hleps to rule out some of the basics....
How's your chain length? I'm going to venture a guess and say it's too short. After you turn 'out' the 'b' screw shift it into small/small and post another side pic.
I'm not saying this is the probelm but it hleps to rule out some of the basics....
How's your chain length? I'm going to venture a guess and say it's too short. After you turn 'out' the 'b' screw shift it into small/small and post another side pic.
honestly this has been a project bike ive worked on little by little over this year so i should probably go back and check that out and either address or cross that off my long list on things to check.
08-20-13, 03:22 PM
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It will definitely make a difference but he needs to run the standard connection to the 7400 derailleur to be compatible with his 7400 shifters. If the cable is on the wrong side of the derailleur's pinch bolt that might explain the shifting difficulties. Also if the pinch bolt washer tab is pushed up against the cable that could account for the problem.
Last edited by Al1943; 08-20-13 at 03:25 PM.
