Topic: which fork oil for a honda cb 125s?

[mazingerzeca]

Hello all.
In the workshop manual of my honda cb 125s only is written: Fork oil: ATF or equivalent fork oil. Went to the dealer and found Castrol fork oil SAE 10, SAE 15 and SAE 20. Which one should I use? Which is the difference on performance between them? Thank you.

[Johnie]

I was told by my dealer that 10W is closer to ATF.  I think 15W may be to heavy for that light bike.  Please correct me if I am wrong members...

[333]

The fork oil manufacturers used to have an "ATF Weight" fork oil.  PJ1 and Bel Ray.

[crazypj]

Use ATF, its cheaper and all thats needed.
 Using more expensive oil is just a waste of money in damper rod forks.
 On some competition types a synthetic oil reduces 'stiction' of seals/bushings but no on a CB125S
 (conventional style and USD cartridge forks must have better, specific oil or they don't work right)
PJ