Penton Owners Group

General Discussion => Penton Talk => Topic started by: brian kirby on June 14, 2010, 07:06:39 PM

Title: 'Zoke shock tuning
Post by: brian kirby on June 14, 2010, 07:06:39 PM
After rebuilding my 'Zokes with one of Rod's kits I am pretty impressed with their performance and their design, they had to have been the best shock you could get in '77. One thing I was especially impressed with is the internals of the shock are essentially a modern "cartridge" type with a shim stack just like the forks or shock dampers on a brand new bike. The one area I would like to work on is damping, I want to go to stiffer rate springs (I've got stock black) but the shocks seem to be a bit underdamped with the lighter springs I have now. Has anyone ever experimented with adding more than the standard two shims? I have some spare ones I could use. This should increase damping just like a modern shock right? Or should I run higher viscosity oil? I used Showa 5W shock fluid when I rebuilt them.

Brian
Title: 'Zoke shock tuning
Post by: Larry Perkins on June 15, 2010, 07:26:55 AM
Brian,

For moto and aggressive riding try 7W and purple springs in the layed down position or for an MC5.  Never have ridden any that the damping was messed with so I can't give any feedback on that.

Larry P
Title: 'Zoke shock tuning
Post by: joe novak on June 15, 2010, 08:57:02 AM
I always liked my KONI shocks.  They are dampening adjustable, and easily adjustable, too.   Those 'Zokes were the coolest looking shocks back in the 70's.
Title: 'Zoke shock tuning
Post by: Merlin on June 19, 2010, 03:53:58 PM
Yes Brian your logic is correct, if memory serves use the "2 light instead of 1 heavy shim" method and you will do fine.

Quote: Thomas Jefferson, We are all born ignorant, some work to remain that way.
 Quote:Peter Villacaro, "it is impossible to teach those that wish not to be taught".