fork oil

Paul Heim SuprHtr at
Thu Feb 28 04:11:45 PST 2008

Lighter oil will make for a plush ride, but you may pogo some or wallow in 
fast corners.  Heavier fork will, subjectively, be similar to stiffer 
springs, with a more harsh but generally better controlled ride.  All things 
can be overdone, so some experimentation with maybe one moderate change at a 
time is advised.  Also note that Charles is running his "12.5" weight oil in 
forks with Racetech cartridge emulators.

I installed the cartridge emulators, 10 weight oil, and 1.0 kg/mm springs 
ALL AT ONCE and the change was too drastic.  At the time I weighed about 175 
and it beat ther crap out of me on highway expansion joints.  I was on the 
verge of going back to the stock springs and playing with preload when I met 
my wife and started doing mostly 2-up riding.  I jacked the rear preload up 
to max and the bike is now perfect for riding 2-up on twisty backroads.  If 
I ride alone, it still rattles my bones.

Paul in Ohio

----- Original Message ----- 
From: "Jonathon Jay" <annihilator1100 at>
To: "Paul Landry" <p_landry at>; <gpzlist at>
Sent: Wednesday, February 27, 2008 11:23 PM
Subject: RE: fork oil

Now I'm completely tortured. You say:
"> Yes, thicker oil takes longer to move through the internal passageways 
of> the forks, slowing down the compression and rebound, making things> 
Let's assume I go the opposite route.

So if I go with a lighter oil, it speeds up compression and rebound, but 
makes the bike "looser"?
I want fast response and don't care as much about cushioning.Regards- 
Jonathon Jay 

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