Rear shocks

[Elliot Cannon]

I have a new (to me) 1975 CB750 with 67,000 miles.  A nice bike that I think sat for a few years.  I am wondering about what kind of the shape the rear shocks are in.  I haven't ridden a motorcycle in about 35 years so I don't have anything to compare.  Is there a way to test if my rear shocks are OK or need replacing?  If they need replacing, where can I get new shocks?
         Cheers,   Elliot

[sgtslag]

Not sure about testing them, but even if they are 'good', it would still be best to replace them with Progressive 412 shocks:  progressive wound (dual-rate) springs; bike will ride like a modern motorcycle; handling will improve dramatically, making the ride safer.

Unfortunately(?), the Fork Springs need to be done at the same time, or you will notice it...  They make progressively wound Fork Springs, as well.  The difference in quality, as well as comfort, is amazing.  They're worth every penny, IMO.

There are various sellers of Progressive products on the Web.  Do a search, to see who has the best prices.  Cheers!

[masiste]

 Replacement is the name of the procedure. Those shocks are way too old. Save them as souvenirs, garage motives, trophies, you name it ( do not throw M away ) but do replace those and also upgrade your front fork components.

[Piute]

    You can take them apart ,very easyly but be carefull,
 Then just check the dampining rod push it down and watch it come back up,
 If it stays down "NO GOOD",The seals go bad and best to buy new.

[shinyribs]

If they are leaking any oil around the shafts then its definitely time to replace them. Even if they are not leaking, the oil may is most likely beat all to death in there just from age alone. If they still have a firm ride then they're probably OK. If they feel soft and jouncy then the oil is shot for sure.

I can't comment on progressives aon the rear,but plan to get some before spring.I can say that progressive springs in the front made a HUGE difference in the comfort level of my bike and I can honestly say it DOES handle better with them.The front tire just tracks better with them.By far it has to be one of the best $78 I ever spent on a bike.

[Wiggybaby 67]

I recently acquired a 80 CB70F.  It has definitely been sitting a while.  Replace the rear shocks, ok got it.  What about the fronts?

[masiste]

Wiggy .

 For the fronts you can replace the internals. I am about to do it for my DOHC. The internal springs. You have a couple options.

 Check RaceTech Suspensions.  http://www.racetech.com

 There is also Progressive Suspensions.  If you can not find it in the net I can check the addresses around.

  That will bring in better than new suspension performance.

 Elliott .

  The SOHC bikes I believe are lighter than DOHC bikes.  Do you ( or anyone around ) know if DOHC ( CB750F) rear shocks fit SOHC ?  I have a set of used but good rear shocks.  If those work, you can have them if you want them, just shipping charges ( From CA 90278.) These rear shocks and a lighter bike should work fine provided it fits.

   I think Hoosier has both kind of bikes. Hopes he is reading and can shed some light over here.

   Happy ThanksGiving.

 

[Wiggybaby 67]

Thank you for the information. I haven't had an inline four since I was a freshman in college. 

I think the DOHC bikes are too heavy for those shocks. I do appreciate the offer. Money isn't really the issue for me. It's lack of knowledge and skill. I am good with the small four strokes my kids play with. Now have to work on a real bike. 

Have a great weekend. 

Jeff

Sent from my iPhone

On Nov 21, 2012, at 9:52 PM, "jaimesix [via Honda CB750'S]" <[hidden email]> wrote:

 For the fronts you can replace the internals. I am about to do it for my DOHC. The internal springs. You have a couple options.

 Check RaceTech Suspensions.  http://www.racetech.com

 There is also Progressive Suspensions.  If you can not find it in the net I can check the addresses around.

  That will bring in better than new suspension performance.

   The SOHC bikes I believe are lighter than DOHC bikes.  Do you ( or anyone around ) know if DOHC ( CB750F) rear shocks fit SOHC ?  I have a set of used but good rear shocks.  If those work, you can have them if you want them, just shipping charges ( From CA 90278.)

   I think Hoosier has both kind of bikes. Hopes he is reading and can shed some light over here.

   Happy ThanksGiving.

 

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