SRM shock nut

[roadrocket]

Hello

I have noticed that SRM has launched a special shock absorber nut with a hexagon, and two allen screws. Has anybody had any experience with it? My split pin gave way, and the nut travelled outwards... Very slack chain before I noticed this...

Regards Otto in Denmark

[bsa-bill]

Yep - nice bit of kit, would have been nice to have had a wee bit more Hex but with a good socket is OK.

They advise torquing up to 65Lbs, a bit of Loctite is good as you can't use a split pin.
The two holes - handy for a timing disc

If you use Loctite and then want to take it off again  then use a heat gun first, without heat mine would not budge.

And when tightening or slackening please use a clutch locking tool, using the rear brake to stop the rear wheel turning while in gear is not good, defo not good when the new cheapo rear brake cable snaps and your leg becomes invisible as it's moving faster than the speed of light  and colliding with interplanetary bits of BSA.
I continue to live and learn

[alanp]

I agree with Bill about the need for a wider hexagon on it.
It is quite narrow and easily damaged if the socket/spanner slips while giving it some, which is possible when balanced on one leg with the other leg pressing down on the rear brake pedal (Goldie rod type Bill) and what's left of the rest of you is trying to keep the socket on the hexagon and operate the torque wrench at the same time. Should apply for a place on TV's 'Britain's Got Talent', that would make them laugh to watch that one. As a result I went back to the BSA widget and loctite until Bob Newby included a nice big crank nut with his belt drive kit.
Alan

[wilko]

I always grind down the chamfer on my sockets for use on narrow nuts!!

[bsa-bill]

Insert Quote
I always grind down the chamfer on my sockets for use on narrow nuts!!

Nice one Wilko
as usual for myself - the obvious  is to obvious to see

[roadrocket]

Thanks for input, I'll definately get one, as I already have the SRM timing kit, so much the better.

Otto

[Mosin]

I've had one on my bike for about 2000 miles without any locktite and it hasn't shifted at all. Good pice of kit and extremely handy if you already have the SRM timing kit.