SOHC.co.uk Forums > CB350/400

Upper Shock mount question

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Mikep328:
I'll do that, thanks!

Trigger:

--- Quote from: Mikep328 on September 07, 2023, 10:31:03 AM ---I measured the bushing width on the new shocks - 25mm - so pretty close to the OEM bushing in the photo.  Not sure whether to bother with any spacers at all...

--- End quote ---

Once the OEM ones are squeezed in they are 40mm. At 25mm the top of the shock will float horizontally  ;)

Mikep328:
As a follow up, my right side upper mount needed no washer with the new shock to align with the swingarm.  The left side needed an M16 3mm washer on the inside to align. 

McCabe-Thiele (Ted):
That is strange 3 mm is quite a bit, is there any side movement in the rear swing arm or does the shock absorber frame  boss look slightly different in any way?

Mikep328:
There is no side movement whatsoever in the swingarm - very firm; like a new bike.  Maybe new bushings when it was worked on extensively in '18 and '22 though no mention of that in the receipts. 

The mounts look the same to me by eye. 

FWIW, there can be a difference in the alignment depending on tightness of  the upper mounting nut.  I am not aware of a torque setting for those nuts.  The left side would align with out a spacer if the nut is "snug" but not what I'd call tight.  Car shocks are often tightened until the nut/bolt "stops" against the metal sleeve inside the bushing but there is no sleeve in these shocks.

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