SOHC.co.uk Forums > CB750

Forkin' ell

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Bristolbadger:
Morning all. Hoping someone might be able to shed some model specific light on these please. Had to rebuild them again after a leaky left one and ideally need to know how much oil they need from scratch.

It might be a bit to worn inside the case and that's my trouble, not the Pyramid oil seal... will soon see.
585mm stanchions.
Cheers

Johnwebley:
What bike is it?

The 500 series take 160cc,

ATF fluid in my case

Hope it helps

Sent from my SM-A750FN using Tapatalk

McCabe-Thiele (Ted):
FWIW you should find the information in one of the manuals in. Aladdins Cave here.

K2-K6:
That casting type was on the end of SOHC production (750 F2, CB650 I think) then on following twin cam bikes.

150ml not a bad start point if you can't find information as it's not absolutely critical.

Minimum has to still cover damper valves (with spring volume in the fork cavity ) such that it doesn't go into air and not damp. Maximum is more to do with air gap above the oil and going too high here will give hydraulic lock to prevent fork compression. 

This Maximum is usually considered adjustable in level if you want for example to give more air spring effect at full compression in preventing bottom out under heavy braking. Tweaks of 10ml going upward from 150 ml would be normal to assess.  Or measuring down from top of stanchion with a dipstick to set that way.

The 750 F2 manual states 145~155 cc fill volume.

davefirestorm:
They look same as my CB650 forks and Mr. Haynes states ATF fluid 170ml Dry and 150ml at oil change😁

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