Author Topic: Mod to primary tensioner  (Read 3033 times)

Offline muskrat

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Re: Mod to primary tensioner
« Reply #15 on: 28.08. 2011 14:18 »
 Been there before, doesn't scare me. It's a BSA, it's an A model. Now I feel complete, 1 semi unit, 1 pre unit and a unit. Wife recons I'm not the full unit.  *smile*
 I'll be doing the same mod to it too.
Cheers
'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, .
Australia
Muskys Plunger A7

Offline muskrat

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Re: Mod to primary tensioner
« Reply #16 on: 29.08. 2011 11:31 »
G'day all,
            very happy to report all good with mod. After 785 miles no wear at all on the slipper so would guess it will be quite a few thousand before it wears to the rollers. Could at least double the life of a chain.
Cheers
'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, .
Australia
Muskys Plunger A7

Offline Greybeard

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Re: Mod to primary tensioner
« Reply #17 on: 29.07. 2013 09:05 »
Musky,
How has your primary tensioner mod held up over two years?

Online orabanda

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Re: Mod to primary tensioner
« Reply #18 on: 29.07. 2013 09:22 »
Good work Musky!

For those who might not have noticed, you can see a date stamped to the upper left of the vertical arm of the slipper.

I assume this was the engine assembly date.

My semi unit A10's also have date(s) stamped in the same spot.

Richard

Offline Russ

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Re: Mod to primary tensioner
« Reply #19 on: 29.07. 2013 13:00 »
Muskrat
As the original adjuster plate is "very hard steel" do you think it possible to make one successfully from a mild steel with the nylon block attached, or would this be flirting with danger.
Russ
1951 A10 Plunger.
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Offline muskrat

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Re: Mod to primary tensioner
« Reply #20 on: 29.07. 2013 14:16 »
G'day fellas, it's just like the day I put it in and haven't had to adjust the chain at all.
Russ, my only concern with using mild steel is the rigidity of the curvature and right angle bend. As mentioned in another topic I sharpen a masonry drill bit the same as a normal drill bit, cuts no worries. *wink2*
Cheers
'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, .
Australia
Muskys Plunger A7

Offline Russ

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Re: Mod to primary tensioner
« Reply #21 on: 30.07. 2013 11:28 »
Muskrat and others,
I can get a tensioner made at work from stainless with nylon attached as per Muskrat's. Is this a safe option?
Russ
1951 A10 Plunger.
Australia

Online BSA_54A10

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Re: Mod to primary tensioner
« Reply #22 on: 02.08. 2013 22:19 »
If you use steel about twice the thickness it should be fine,
Worst thing it could do is to bend into a tighter curve and that will not give you much grief.
Bike Beesa
Trevor

Online trevinoz

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Re: Mod to primary tensioner
« Reply #23 on: 03.08. 2013 00:03 »
Or the 90 degree bend become 180 degrees.

Trev.

Offline muskrat

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Re: Mod to primary tensioner
« Reply #24 on: 03.08. 2013 03:52 »
That's the one that would be of most concern Trev.
Cheers
'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, .
Australia
Muskys Plunger A7

Offline duTch

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Re: Mod to primary tensioner
« Reply #25 on: 20.08. 2013 10:15 »

  Musky a great idea, read it a few times but I may have hit on a solution to the problem :-

   Cut the piece you need from the chopping board from the other end from the existing handle, then you can say it can be used left or right handed or both, or, it's R&D invention for ambidextrous users (you can be on easy street)....?

 Sorry couldn't help it..duTch


  Oh yeah , if there's still slack in the chain at full adjust, best go for a new chain
Started building in about 1977/8 a on average '52 A10 -built from bits 'n pieces never resto intended -maybe 'personalised'
Have a '74 850T Moto Guzzi since '92-best thing I ever bought doesn't need a kickstart 'cos it bump starts sooooooooo(mostly) easy
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