Shifter

[Vantage]

Gunk/debris in the shifter? Can you drown it in WD40 or similar, let it soak for a while and try again?

 

[eldridge]

Cheers Vantage these are the kind of suggestions I’m looking for to remedy the problem.

I have let in soak in GT85 but still the same I’m afraid.

Thanks for the help though.

 

[DCBassman]

Must confess, it just doesn't sound like a shifter problem. Hanger alignment?

 

[roadrash]

have you checked and cleaned the cable guide under the bottom bracket , prime place for getting clogged with shyte

 

[eldridge]

Must confess, it just doesn't sound like a shifter problem. Hanger alignment?

I have thought about changing the hanger tbh.

Thanks for your advice.

 

[eldridge]

have you checked and cleaned the cable guide under the bottom bracket , prime place for getting clogged with shyte

Yes I'm pretty sure that is clean.

Thanks Eldridge.

 

[Vantage]

Re cable slack, is there any while trying to change down or does the cable remain taught throughout each shift?
Have the jockey wheels been replaced in the correct order? The top one usually has more float (side to side play) than the bottom.
Does the rear mech spring back from the big sprocket to the smallest under its own tension?

 

[winjim]

Must confess, it just doesn't sound like a shifter problem. Hanger alignment?

I have thought about changing the hanger tbh.

Thanks for your advice.

Hanger alignment should really be one of the first things you check. It might not require replacement, just realignment.

 

[berty bassett]

if the cable is outside the frame , hook seat on washing line , get someone to spin crank while you hold the bare cable tight and shift gears up and down - you will be able to feel it either pull tighter or slacken , if it doesnt slacken without pulling a bit then problem is shifter end if it does then its rear mech end ?
bike stand is nearly as good as a washing line !

 

[eldridge]

if the cable is outside the frame , hook seat on washing line , get someone to spin crank while you hold the bare cable tight and shift gears up and down - you will be able to feel it either pull tighter or slacken , if it doesnt slacken without pulling a bit then problem is shifter end if it does then its rear mech end ?
bike stand is nearly as good as a washing line !

Thanks fella really appreciate the suggestion.

Will give it a go

Cheers Eldridge.