Honda CB750 Sandcast
The Restoration Shop => Front End and Suspension => Topic started by: jaka on October 25, 2020, 12:15:32 pm
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Hi!
When I removed the rear wheel on my 1969 sand cast to replace the old Dunlop K87 tire I noticed that the rear shocks glided sligthly 5-7mm on the upper shock mount. Is that correct or is a two new rubber bushings needed? I assume the shocks should be right against the frame and the nut/washer/holding bracket and not lose as on my bike.
I have the washers and the left holding bracket is in place. Just curious why the shocks glide on the upper mount? -Any body ?
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sounds like a shock mount Photo would be good
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Hi!
Here är two pictures of the upper shock mount.
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Hi!
Seems that the first picture did not get through. -One more try.
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Ah. You have later shocks on there. The correct shocks for a sandcast have a black plastic sleeve under the spring and a black painted top eyelet. Here's an example:
https://www.ebay.com/itm/Honda-NOS-CB750-Set-Rear-Shocks-CB-750-CB750K0-K1-52400-300-020XW/223547203809?epid=1811838705&hash=item340c73a0e1:g:JYUAAOSwVL1WAyPu
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Sam post is spot on.
Looks like the wrong shoulder bolts are installed on top mount as well.
DW
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Hi!
Are my shocks for a K1 or K2 or later model?
So these from CMS in Holland would be more fitting?
https://www.cmsnl.com/honda-cb750k0-four-1969-usa_model14346/cushion-set-rear-non_05240300010xw/#.X5fSXu17nIU
The shoulder bolt?? What should it look like?
And what about the coils on the shocks? Had the original CB 750 sand cast seven coils?
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Yamiya has them cheaper:
https://www.yamiya750.com/index.php?main_page=product_info&cPath=246_251_142_93&products_id=131
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Webike has them slightly cheaper again. Both companies are selling the same shocks and whilst these are close, they are not an exact copy. If you don't care then it doesn't matter. I'm finding Webike are cheaper with shipping at the moment due to China virus but to the US the rates may be cheaper or similar, if so then follow Sam's link and go with Yamiya
PS. Just checked Wow Yamiya shipping to the US is way better, not so to Australia
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Hi!
Problem with buying from Japan is the High custom charges( 25%) on goods to Sweden
Buying from European companies is therfore much more favorable.
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Ah! You're in Sweden. Well that does change things
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If you have a sandcast wouldn't you try and get original Honda either new or used. Just asking
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Hi!
Yeah! Sure I would like to get a set of original ones but is that possible today? I mean I both like to have the right shape but also want them to function.
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Hi!
Went to" Z1 Parts" and saw that they had two different shocks, both made to "sand cast " standards. One was exactly like the ones I have ,with aluminum upper mount (16mm) and six coil spring and the other like the one we have spoken about here ,with black upper mount (22mm) with seven coil spring.
How come there are two different shocks that re supposed to fit the CB 750 Sand cast frame? -Did Honda make two different frames, one with shorter rear upper shock mount and one with longer ?
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All sandcast and diecast K0 bikes used the same shock through VIN CB750-1048752 according to the honda parts book. Don't trust Z1 and many ebay sellers when they label something as correct for a sandcast. Easy to do when there is no penalty for being wrong!
I have used this shock on a diecast in the past:
https://z1parts.net/sandcast-shocks-1969-honda-cb750/
It is ok, but not a great replica. The shock sold by Yamiya and others that KP pointed out is much closer to being correct. Original shocks are tough to find, but would be everyone's first choice!
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Here's what you need Make him an offer of $200 and he may take $250. These look to be correct and condition seems to be OK Working condition is another question but they are correct
https://www.ebay.com/itm/363157610272?ul_noapp=true
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I´ d say those on ebay are K1.
5 times around
https://www.ebay.com/itm/Honda-NOS-CB750-Set-Rear-Shocks-CB-750-CB750K0-K1-52400-300-020XW/223547203809?epid=1811838705&hash=item340c73a0e1:g:JYUAAOSwVL1WAyPu
Here are mine and I´m pretty sure those are the original ones my sandcast came with.
7 times around
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Correct Uli, those new shocks being sold by Joe Marks are K1's but a lot of restorers have bought these over the years and replaced the spring with the correct K0 one. The correct springs can be purchased from Yamiya and are easy enough to install or re-chrome a used one. I actually haven't seen a K0 shock for sale in at least 10 years or more
The pair being sold by macivmotors are correct K0s even though I can't cop the seller. ;)
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Hi!
So these are correct?
https://www.ebay.com/itm/363157610272?ul_noapp=true&autorefresh=true
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Yes, though they are almost certainly not going to perform well. 51 year old shocks will likely have failed seals and no oil left in them. Fine for display, but they won’t ride as well has a fresh set of shocks.
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Still good enough for a short evening run (here on my diecast)
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Hi!
So these are correct?
https://www.ebay.com/itm/363157610272?ul_noapp=true&autorefresh=true
Yes They are correct and not so common in that condition. They may still be OK as they don't look to be wet around the bottom mount area but as Sam said, could be empty of oil. Seller could have cleaned them of oil but still look to be dusty. These can be rebuilt if the seals are gone