I am rebuilding my F4 race bike (that sounds way better than the usual description of the bike ) which is essentially a cobbled together collection of 125cc two stroke sized bits from various road bikes. It's called bucket racing in NZ and conducted on kart tracks, absolute mayhem but lots of fun. Anyway, I thought I may apply some science to the suspension and am trying to find a better way of deciding the oil level in the front forks other than "that looks about right". Anyone know of a formula, suggestion, hint, anything? The forks are damper rod, right way up type, definately low tech!