harrythefinn wrote: After some research came up with the following,
http://www.pvdwiki.com/index.php?title=Suspension_Fluid
Some interesting mathematics involved. But the oil weight and specification tables are interesting.
Interesting link Harry
Just to be exact, the Fork oil I bought was
Motul Fork Oil Expert Light 5W
Its for a DRZ and the owners manual recommends 5W
http://www.motul.com.sg/product_line_up ... ers02.html
Apparently you can blend the different grades for a specific application
http://www.motul.com.au/product_line_up ... _CHART.pdf
I bought it for my old 2003 DRZ after noticing the night and day difference in front suspension when compared to my newer low mileage 2007 DRZ.
Previously tried flushing with kerosene and replacing the old sludgey oil with new ATF. Still too stiff, even after lowering the fork oil level to reduce the
Air Spring Effect
Repeated process using (what
appeared light weight) toyota suspension fluid sourced in Phnom Penh, weight unknown. No improvement from ATF fluid.
Will report back after I get time to try the Motul 5W.
If that doesnt work, then its time to disassemble the forks and check for problems.
I note the teflon coated bushings are not too expensive but its the usual pain to ship them over.