Shimano SL-7700 Down Tube Lever Fitting

[Brian73]

I sold a set of the SL-7700 9 speed levers on ebay.

I took them off my 2012 Bob Jackson, they worked perfectly

The buyer has tried to fit them to a 1990 MB Dronfield

He said that there is play in the rear shifter, even with the M5 bolt tightly done up

There was no play with them fitted to my Bob Jackson.

Could the thread on the M5 bolt be bottoming out in the shifter boss?

I guess these Dura Ace shifters have a smaller stack than the lower spec levers

Anyhow, I've had to accept them back and pay the postage as he says they are faulty

Pretty annoying really

Has anybody tried to fit this model to their older frames?

[Samuel D]

Is he referring to the play in the direction of lever movement, i.e. the play within the detent of each gear enabling a small overshift when changing down a gear (to a larger sprocket)? This is of course normal and deliberate.

You might have to take them back anyway, eBay being what it is, but the pair of you could be talking at cross-purposes.

Another thought: if one frame has oversized tubes and the other doesn’t, you’ll need the two different “lever boss cover” parts that Shimano offered for these shifters.

[Brian73]

He said play in the axis of the M5 bolt.

I suspect the shifter boss needs tapping out a bit more to account for the smaller stack

I told him to go to a bike shop and have it looked at but he refuses to do so

He's had them nearly 2 weeks

He said they were missing parts until I emailed him the Shimano pdf tech docs, he then admitted everything was present

I hope he buys another set and has the same problem.

At least then I will be vindicated.

I've been on ebay 15 years and it just gets worse and worse, their policies favour buyers, not sellers

[Brucey]

are the ones in the picture yours? As pictured;



they appear to be incomplete; the RH lever should have a bezel (between the lever and the frame) similar to the left one. Without it the lever won't tighten or work properly.

You can buy the correct bezel as a spare part for about £2 or something; there are two types, depending on whether the bezel butts up against a flat boss or a curved frame tube.

Part numbers here;
http://bike.shimano.com/media/techdocs/content/cycle/EV/bikecomponents/SL/EV-SL-7700-1663_v1_m56577569830611817.pdf
Flat bezels work in most cases (even if the boss is mounted to a curved tube) but just look a bit ugly.

cheers

[Brian73]

I just pinched a stock photo from ebay

This is the actual item

Was fitted to a 2012 Bob Jackson Audax Club

[Norman H]

Brian73 wrote


Could the thread on the M5 bolt be bottoming out in the shifter boss?

That's a possibility.

I'm running some Dura Ace bar end shifters on Retroshift (Gevenalle) brake levers. I had a problem with the M5 fixing screw bottoming out. I fixed it by shortening the screw.

Shimano also make two types of lever boss covers. One is flat and the other is curved to suit a curved downtube. Is it possible that these are a mismatch?

[Gattonero]

The boss covers have a series of notches inside, to match the body of the shift lever. If they're not fitted corectly, the shifter doesn't stay up well.
To me it sounds like the bosses on the frame have not been prep'd both in the M5 thread chasing, and also the paint removed from the flat/round extension of the bosses