CZ the good oil

[HL400]

Hi CZ experts, what weight oil do I put into a 1973 CZ 400 forks. ?
also what do I use in the gear box ?
HL

[shortshifter]

HL couldnt find any info on fork oil weight,but I suppose personal preference has some bearing.Gearbox oil everyone has an opinion on that but Ive just changed mine and am using Motul 10004t 20w-50 which has the extreme pressure additives.The previous owner said he just used a good quality motor oil 20w-50 and another guy I know uses extreme pressure differential oil.Take your pick.

[090]

Its definitely thicker oil. 15 or 20 weight.

[HL400]

thanks shorshifter, does, 70cc sound right for each leg ?

[Ian P]

Try this
http://www.czmadness.net/techdata/techdata.html
 

[HL400]

Hi Ian P,  now I have different amounts my old manual says 70cc and the one on the web site says 170cc. !!!!!  HL

[Bamford#69]

Hi
I 've been using Castrol TQF ,170 ml per leg when dry and with 7 inch travel, 72 kg (wringing wet) ,the CZ riders handbook Recommends;
Transmission oil; Castrol SAE 80 ,&Shell Spirax,
I've been using  that and now Castrol EP80/90 for all my CZ's gearboxes since 1964!!
and  20 to 1 fuel/oil  , have'nt blown one up (yet)
  cheers

[HL400]

Thanks Jikov, sounds like 170cc is the GO.  the gear box oil sounds a little thick, ha ha funny one.
so you SAE 80 is the go for the gear box,  HL

[Bamford#69]

Hi
If you go to the Castrol oil site and have a look at an oil called VMX80,read the tech sheet, sounds like it was just made for the job I have'nt used it, did'nt know about it ,but it sounds like the stuff, available from Supercheap ,