Author Topic: plunger frames  (Read 2379 times)

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Offline YoungRider71

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plunger frames
« on: February 17, 2012, 08:01:47 PM »
I have been thinking of a custom bobber rebuild for my 750. Looking around I have come across plunger frames and not a whole lot of information about them. I was wondering if anyone would be willing to put thoughts or ideas out there. It seems that these frames are basically junk when it comes to anything but highway riding. I really like the look of them and haven't spoken to anyone who knows much about them.  Thank you.
74 CB750

Offline scottly

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Re: plunger frames
« Reply #1 on: February 17, 2012, 08:08:07 PM »
Plunger frames float the rear axle between springs. They have no damping. They are a bit softer ride than a hard tail. My '53 BSA came stock with a plunger...
Don't fix it if it ain't broke!
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Offline 754

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Re: plunger frames
« Reply #2 on: February 17, 2012, 08:23:50 PM »
 They are a bearable ride.. much softer than a rigid.. if the  axle is inline with the springs, they work fine, the offset axle mounting, IZ can not speak to that as I have not used that type.
 I put a lot of miles on a Saviour, and long rides, was happy with it. Handled fine, but I am not a roasdracer, nor try to be. I do remember surprising an unexperienced Norton rider on a twisty road with it...
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73 836cc.. Green, had it for 3 decades!!
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Offline CycleRanger

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Re: plunger frames
« Reply #3 on: February 17, 2012, 08:24:24 PM »
I really like the look of them and haven't spoken to anyone who knows much about them.  Thank you.

These guys know all about them!  http://www.hondachopper.com/
 :)
Do you have a copy of the Honda Shop Manual or Parts List for your bike? Get one here:
https://www.honda4fun.com/materiale/documentazione-tecnica
CB750K5        '79 XL250s     CL350K3
CB750K3        '76 XS650      '76 CJ360T

Offline YoungRider71

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Re: plunger frames
« Reply #4 on: February 18, 2012, 02:13:53 PM »
Thanks for the help guys. I went to Honda choppers and all I can say is wow. There seems to be years of knowledge about chopping bikes there. I spent so much time taking it all in that I completely forgot why I was there in the first place. I think as I get closer to next winter I will spend quite a bit of time between the sites. I would like to just wake up tomorrow and have the bike built but I am not loaded and I plan on building my own ride.  Lots of time to dream.  Thanks again.
74 CB750

Offline 23tbucket

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Re: plunger frames
« Reply #5 on: February 18, 2012, 07:04:41 PM »
Plunger frames!!! Got three of them.....they are crazy fast!!!!lol





Offline CycleRanger

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Re: plunger frames
« Reply #6 on: February 18, 2012, 07:55:03 PM »
Holy Cow!   :o

Beautiful!
Do you have a copy of the Honda Shop Manual or Parts List for your bike? Get one here:
https://www.honda4fun.com/materiale/documentazione-tecnica
CB750K5        '79 XL250s     CL350K3
CB750K3        '76 XS650      '76 CJ360T

Offline YoungRider71

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Re: plunger frames
« Reply #7 on: February 18, 2012, 10:47:38 PM »
Wow... thats all i got. Very nice 23, very nice
74 CB750