I use a RK O-ring chains on the bikes, even my sons kx85 and finding a 420 oring can sometimes be difficult. I have to rebut you claim of the lube not making a chain slide better tho, heres why. After a day of riding, put your bike on the stand and spin the rear tire (plenty of resistance). Then, lube the chain really well and try again (spins freely) the guide and slides on the swingarm create a lot of drag from all the dirt. Going to the local races I see people drenching their chains after every moto, I cant see how this is effective in prolonging the life of a chain. Ive been using oring chains for years and probably have to adjust them only a few times a year, only using chain lube if the bikes get pressure washed due to muddy conditions. Every year I flip the chain over so the entire radius of the rollers have even wear. This has been my process of chain maint for years and has proven to me that I can get quit a long time out of a chain compared to many riding buddies. I would rather spend money on something else rather than chains and lube.