[SpudRider]

I have ridden over 34,000 miles on my Zong, so I have decided to change my fork oil. I have not yet taken my forks apart, but I think I have a pretty good idea of their construction. The Zongshen forks employ a cartridge, and are 37mm in diameter. I believe a partially disassembled, Zongshen, USD fork is shown in the photograph below, which was posted by forum member, Forchetto.



The Zongshen, USD forks are very nice, and I have been quite pleased with their performance. However, I think I might experiment with a different weight of fork oil, and/or preload spacers.

However, I have a question; the Zongshen Service Manual specifies HQ-10 as the stock fork oil. Has anyone ever heard of HQ-10 oil? :?: I searched the internet, and could only find three references, all of them Chinese, to HQ-10 oil. :roll:

http://www.chang-jiang.com/cj750/con6.htm
http://www.veloteq.com/service_manua...ers_manual.pdf (See page 15)
http://www.masson-marine.com/fic_bdd...ice_manual.pdf (See page 28 )

If the valves in the Zongshen fork cartridge will permit, I plan on using either ATF, or motorcycle fork oil. However, I would like to know the viscosity of my present fork oil, the HQ-10 oil. Can anyone help me discover this information? Thank you.

Spud