I have a set of 47mm twin-chamber Showa forks that are ramping-up too firm at the end of their travel.
I guess that in a 'twin-chamber' (Showa spring & SSS KYB's) set of forks, the outer/lower chamber oil is only utilized for use in the bottoming-cone and progressive air-pressure rise adjustments (and to the non performance aspect of lubrication).
The upper chamber manages all the compression & rebound damping aspects.
Anyone see why I could not drop the oil quantity/level below the quoted minimum in the workshop manual? I can't see why not?
To see/feel the air pressure increase, I assembled the forks without the spring, I was surprised how much air-spring effect there was!
With the bottoming cone oil-lock-collar removed and the compression adjuster set to minimum, I was still not using all the travel !
I am 200 lbs and my 2-mile long test track has heaps of jumps.
What say those with fork knowledge?
Melbourne, Australia. Current rides: '11 RMZ450, '84 CR500, '06 DRZ400, '79 KX250 with 400 engine, '06 GSXR1000 full Yosh racebike.
