BigBird2 wrote:
"The left fork, with the spring and the ride height (or preload) adjuster is the old fashioned "damper rod" design. However, the passages for the oil are so huge that is provides almost no damping in either direction even if you use thicker oil. The exception to this is the anti-bottoming cone at the bottom of the damper rod. This device does nothing (no damping) until you are about 5" into the 7" of available travel. At this point it DRAMATICALLY increases the damping to minimize/eliminate the chance of actually mechanically bottoming the forks. Before I understood how this left fork worked I tried going to thicker oil in hopes of getting more compression damping. This did almost nothing for compression (or rebound) damping in the first 5" of travel. However, it made the damping in the last 2" of travel so firm that it effectively limited the fork travel to 5" or a little over. "
I agree in every respect.
Consider that you will only have about 3"-4" of compression travel when standing on the footrests and half of them goes into a rock hard hydraulic damping, What is even worse is that the oil will cavitate when the fork is trying to rebound from the compressed rock hard position causing very strange behaviour of the fork. I think the design of the anti bottoming cone is a major drawback of the fork. Using thicker oil will only make things even worse. Use as thin oil as possible to avoid the worst.
I have just started to modify the cone making it shorter and thinner to improve things. Will report later after more testing.
Carl