SOHC.co.uk Forums > CB750

fork oil

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El__burro:
I ve realised that the front forks have little resistance, perhaps a lack of oil.
What oil and how much of it should I use to replace the old one.

thanks
el__burro

Johnwebley:
use ATF auto fluid

 as for amount,check manuals,

 the 500 uses about 160cc

El__burro:
I guess i need to buy 0.5L of SAE 10W-30 to completely replace the oil.
is any 10w-30 good even if not fork oil?
Is just 10w ok?
Also how to i test if the oil seals are good. (eventually before oil change)

thanks
el__burro

Bryanj:
 Any 10w30 is OK and the only way to test the seals is put oil in and see if it leaks out

Chris400F:
I used 10W fork oil when I replaced the seals on my 400. I bought Castrol, it's cheap enough from eBay.
What I did find when I stripped the fork legs was that there was sludge at the bottom of the forks - I suspect the oil was the original - so I cleaned all that out before reassembly.
Replacing seals isn't that difficult (well, assuming nothing is seized when dismantling).
I'd be tempted to change them anyway and make sure all is clean inside while doing the job.

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