Author Topic: Can anyone I.D. these shocks?  (Read 1448 times)

0 Members and 1 Guest are viewing this topic.

Offline Scott S

  • Global Moderator
  • Really Old Timer ...
  • *****
  • Posts: 8,230
Can anyone I.D. these shocks?
« on: February 21, 2013, 12:42:26 PM »
 Last year, I picked up a set of shocks off ebay. They were listed as Progressive, but I'm pretty sure they're not.
 They're 13" eye to clevis, and they're the best riding, best handling shocks I've ever had. I don't know how they 're able to float down the road the way they do and still handle so well in the twisties. Now, granted, I'm no MotoGP rider, and I've never shelled out big bucks for high end shocks, but I REALLY like these things.


 In fact, I like them so much I snapped up another set when I saw them on ebay. These were not listed as Progressives. They're 12.5" long and I've yet to get them installed.


 I didn't notice it until today, but there are markings on the shock: F, M and L in a triangle or arrow. What does this stand for (Fook Me Laughing?!) Firm, Medium and Low?


 The only other markings are on the bottom of each shock. The 12.5: shocks have:
P3041
Made in USA
PC 315

 The 13" shocks have:
P6081
Made in USA
PC 330

 I'm guessing the 315 and 330 is length in mm? Anyone know what these are or anything about them?
'71 CB500 K0
'17 Triumph Street Scrambler
'81 Yamaha XS650

Offline Scott S

  • Global Moderator
  • Really Old Timer ...
  • *****
  • Posts: 8,230
Re: Can anyone I.D. these shocks?
« Reply #1 on: February 21, 2013, 02:02:48 PM »
 Ah-Ha! https://www.denniskirk.com/p-series-high-performance-gas-shocks-w-springs.p58140.prd

 But, what does "•Nine-stage valving with three-position adjustable damping" mean? I see how to change the spring rate (just like any other shock) but how do I change the damping? The "three-position damping": I'm assuming that's the F/M/L?
'71 CB500 K0
'17 Triumph Street Scrambler
'81 Yamaha XS650

Offline Retro Rocket

  • Eggs are hard due too a
  • Really Old Timer ...
  • *******
  • Posts: 19,235
  • ROCK & ROLL
Re: Can anyone I.D. these shocks?
« Reply #2 on: February 21, 2013, 02:15:59 PM »
If there's nothing obvious, send Dennis Kirk an email and ask where do you adjust the damping on those shocks, don't tell them you have some, they'll be more forth coming if they think you are a buyer.... ;)
750 K2 1000cc
750 F1 970cc
750 Bitsa 900cc
If You can't fix it with a hammer, You've got an electrical problem.

Offline Greggo

  • Somebody's
  • Old Timer
  • ******
  • Posts: 4,164
  • Helmets Save Lives. Period.
Re: Can anyone I.D. these shocks?
« Reply #3 on: February 21, 2013, 02:22:50 PM »
In the case of some KONI shocks, there are two adjustments, and only one of them can be made with the shocks assembled.  Which other shocks have you ridden?

Offline Scott S

  • Global Moderator
  • Really Old Timer ...
  • *****
  • Posts: 8,230
Re: Can anyone I.D. these shocks?
« Reply #4 on: February 21, 2013, 02:33:19 PM »
 Like I said, nothing really high-end. MikesXS replacement shocks, worn out stockers, etc. These suit my style just fine.
'71 CB500 K0
'17 Triumph Street Scrambler
'81 Yamaha XS650

Offline 754

  • Really Old Timer ...
  • *******
  • Posts: 29,050
Re: Can anyone I.D. these shocks?
« Reply #5 on: February 21, 2013, 02:39:52 PM »
 The Konis use this,  remove springs. Loosen locknut under bottoming bumper t top of shock, unscrew top eye, remove rubber, the reassembe eye.  Push damper rod gently to bottom, turn left or right, feel for a click..  Check rod for increase or decrease of pressure, moving the shock shaft. Get both the same, reassemble.
 That is how the dampner adjustment is done on old Konis.
Maker of the WELDLESS 750 Frame Kit
dodogas99@gmail.com
Kelowna B.C.       Canada

My next bike will be a ..ANFOB.....

It's All part of the ADVENTURE...

73 836cc.. Green, had it for 3 decades!!
Lost quite a few CB 750's along the way

Offline Bailgang

  • Scott
  • Old Timer
  • ******
  • Posts: 2,699
  • Indiana
Re: Can anyone I.D. these shocks?
« Reply #6 on: February 21, 2013, 03:19:40 PM »
Sent you a PM.
Scott


71 cb350 twin
77 cb750 F2
83 gl1100 Interstate

Offline Scott S

  • Global Moderator
  • Really Old Timer ...
  • *****
  • Posts: 8,230
Re: Can anyone I.D. these shocks?
« Reply #7 on: February 21, 2013, 03:30:50 PM »
 Replied.
'71 CB500 K0
'17 Triumph Street Scrambler
'81 Yamaha XS650

Offline RAFster122s

  • I feel like a really really
  • Really Old Timer ...
  • *******
  • Posts: 12,561
  • SOHC4 member # 2605
Re: Can anyone I.D. these shocks?
« Reply #8 on: February 21, 2013, 03:51:24 PM »
Ah-Ha! https://www.denniskirk.com/p-series-high-performance-gas-shocks-w-springs.p58140.prd

 But, what does "•Nine-stage valving with three-position adjustable damping" mean? I see how to change the spring rate (just like any other shock) but how do I change the damping? The "three-position damping": I'm assuming that's the F/M/L?

Given that Dennis Kirk doesn't offer them any longer, I doubt they will be very helpful...
David- back in the desert SW!

Offline Greggo

  • Somebody's
  • Old Timer
  • ******
  • Posts: 4,164
  • Helmets Save Lives. Period.
Re: Can anyone I.D. these shocks?
« Reply #9 on: February 21, 2013, 04:57:24 PM »
The Konis use this,  remove springs. Loosen locknut under bottoming bumper t top of shock, unscrew top eye, remove rubber, the reassembe eye.  Push damper rod gently to bottom, turn left or right, feel for a click..  Check rod for increase or decrease of pressure, moving the shock shaft. Get both the same, reassemble.
 That is how the dampner adjustment is done on old Konis.

Thanks Frank!  I've got to rebuild a set, and I want to get them right the first time.