Author Topic: SRM shock nut  (Read 988 times)

Offline roadrocket

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SRM shock nut
« on: 31.05. 2011 09:58 »
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
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Otto in Denmark

Online bsa-bill

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Re: SRM shock nut
« Reply #1 on: 31.05. 2011 10:14 »
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
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All the best - Bill
1961 Flash - stock, reliable, steady, fantastic for shopping
1959 Rocket Gold Flash - blinged and tarted up  would have seizure if taken to  Tesco

Offline alanp

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Re: SRM shock nut
« Reply #2 on: 31.05. 2011 20:34 »
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
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Offline wilko

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Re: SRM shock nut
« Reply #3 on: 02.06. 2011 01:32 »
I always grind down the chamfer on my sockets for use on narrow nuts!!
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Online bsa-bill

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Re: SRM shock nut
« Reply #4 on: 02.06. 2011 08:17 »
Quote
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
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All the best - Bill
1961 Flash - stock, reliable, steady, fantastic for shopping
1959 Rocket Gold Flash - blinged and tarted up  would have seizure if taken to  Tesco

Offline roadrocket

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Re: SRM shock nut
« Reply #5 on: 02.06. 2011 10:16 »
Thanks for input, I'll definately get one, as I already have the SRM timing kit, so much the better.

Otto
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Otto in Denmark

Offline Mosin

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Re: SRM shock nut
« Reply #6 on: 02.06. 2011 13:39 »
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.
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1960 A7 Shooting Star
1959 D3 Bantam
1994 Triumph Trident 900

North West England