|
From the theoretical point of view:
Spring is what it is, and making things stiffer is acchieved by making the spring stiffer (adjusting the preload, buying a different spring). You cannot do this on the front of a ninjette I think (adjust preload).
Damper is what makes the spring stop oscillating. Resistance to oil flow is the damper; specific weight of the oil is of no consequence, viscosity is, but you are reffering to viscosity.
Therefore, by changing the oil to a more viscous one, you will increase damping effect, and make your suspension slower to compress or extend. While what you really want to do is make your spring stiffer, or farther from max compression while sitting on the bike normally.
From theoretical point of view this is not wise, because your spring will be pushed equally hard, only it's reaction time will extend, which in fact may actually worsen the performance.
You would want to increase viscosity of fork oil if your front end cannot stop itself from up-down motion after you hit a bump.
If you feel the forks bottom out at a bump, you need stiffer springs, oil won't really help it.
At least that's the way I understand it.
|