The Internal Bleed System improves fork damping by
keeping the oil free of air. This is a non-recirculating cartridge
system in which oil is expelled and drawn from the bottom of the
cartridge. Stock systems circulate oil up the cartridge rod and
back into the cartridge tube where it mixes with air and thins
out, resulting in oil (and performance) fade after a few minutes
The Internal Bleed System is CNC machined and fits 46 and 43 mm Kayaba upside down motocross forks.
For bikes that already have an internal bleed system, Improved needle to further reduce the mixing of air and oil.