Author Topic: Shock absorbers on a plunger!  (Read 254 times)

Online Greybeard

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Shock absorbers on a plunger!
« on: 16.12. 2019 09:49 »
What do you think about this?

Online muskrat

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Re: Shock absorbers on a plunger!
« Reply #1 on: 16.12. 2019 11:22 »
G'day GB.
That looks like handy work by a duTchman. The colours give it away!
Cheers
'51 A7 plunger, '57 A7SS now A10CR, '76 XT500, '77 AG175 '83 CB1100F, '81 CB900F project.
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Muskys Plunger A7

Online Greybeard

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Re: Shock absorbers on a plunger!
« Reply #2 on: 16.12. 2019 11:25 »
I think this was a B31

Online Rex

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Re: Shock absorbers on a plunger!
« Reply #3 on: 16.12. 2019 13:27 »
Seems a bit OTT. Plungers seem to struggle deflecting 1/2" or so let alone going into oscillation mode.. *smile*

Online Greybeard

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Re: Shock absorbers on a plunger!
« Reply #4 on: 16.12. 2019 15:30 »
Seems a bit OTT. Plungers seem to struggle deflecting 1/2" or so let alone going into oscillation mode.. *smile*
Mine frequently fully compress when I hit a pothole, with a hidious jolt to my back!

Online Rex

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Re: Shock absorbers on a plunger!
« Reply #5 on: 16.12. 2019 15:55 »
But then a shock absorber (damper) being added wouldn't necessarily stop that anyway. Are there internal springs inside the dampers I wonder?

Online Greybeard

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Re: Shock absorbers on a plunger!
« Reply #6 on: 16.12. 2019 16:10 »
But then a shock absorber (damper) being added wouldn't necessarily stop that anyway. Are there internal springs inside the dampers I wonder?
I feel that the hydraulic damping would be an improvement.

Online RDfella

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Re: Shock absorbers on a plunger!
« Reply #7 on: 16.12. 2019 17:46 »
"Mine frequently fully compress when I hit a pothole". Need to lose some weight, Neil (only joking, I'm 16st)   Doesn't take much of a road imperfection to hurt my back on my rigid M21 even though I keep tyre pressures as low as poss - 18psi for rear, 20 for front.
'49 B31, '49 M21, '53 DOT, '58 Flash, '00 Firestorm, Weslake sprint bike.

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Re: Shock absorbers on a plunger!
« Reply #8 on: 16.12. 2019 18:35 »
I think this was a B31
I see another pipe on the other side.
C'mon duTch, fess up.
Cheers
'51 A7 plunger, '57 A7SS now A10CR, '76 XT500, '77 AG175 '83 CB1100F, '81 CB900F project.
Australia
Muskys Plunger A7

Online Greybeard

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Re: Shock absorbers on a plunger!
« Reply #9 on: 16.12. 2019 19:39 »
I think this was a B31
I see another pipe on the other side.
C'mon duTch, fess up.
Cheers
Oh yes, I didn't see that.

Offline duTch

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Re: Shock absorbers on a plunger!
« Reply #10 on: 16.12. 2019 23:49 »
 
Quote
.....That looks like handy work by a duTchman. The colours give it away! .....
Quote
... C'mon duTch, fess up.
Cheers..

 Not this little blue duTck *smile* wrong shade of blue....
 I had springs made and took a while to calculate the spring rate I needed but they worked out ok and it only bottoms out on serious holes, off which there are *MANY*..... There's only~ 50mm maximum travel
 I think I asked if anyone has the standard spring dimensions but can't remember if I had success....

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
Australia

Online Triton Thrasher

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Re: Shock absorbers on a plunger!
« Reply #11 on: 17.12. 2019 07:42 »
Shouldn’t the pillar be greasier than that?

Online Greybeard

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Re: Shock absorbers on a plunger!
« Reply #12 on: 17.12. 2019 10:00 »
Shouldn’t the pillar be greasier than that?
Additional damping?

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Re: Shock absorbers on a plunger!
« Reply #13 on: 17.12. 2019 11:05 »
G'day duTch.
Sorry mate, I would have put money on it. Isn't your bike blue on one side and red on the other?
Cheers
'51 A7 plunger, '57 A7SS now A10CR, '76 XT500, '77 AG175 '83 CB1100F, '81 CB900F project.
Australia
Muskys Plunger A7

Offline duTch

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Re: Shock absorbers on a plunger!
« Reply #14 on: 18.12. 2019 03:16 »

 
Quote
...Sorry mate, I would have put money on it. Isn't your bike blue on one side and red on the other?.....

 Weeeel yes,no,and yes.... But the frame is different shade of blue- mine much lighter....

 PS I'd feel guilty taking candy from a baby  *smile*

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
Australia