1986-1989 Honda TRX250 FourTrax 250R Service Manual, Page 163Get this manual
REAR SUSPENSION Visually inspect the damper unit for dents, oil leaks or other damageReplace the damper unit if necessaryPlace the damper rod on scale and measure th force required to compress the damper unit 10mm (0.14in)SPECIFIED FORCE: '86: 23.1 -38.5kg (50.93-84.88Ibl '87: 11.6-19.2kg (25.57-42.33Ibl After '87: 10.9-15.6 kg (24.03-34.39Ibl
10mm (0.14
Ifthe force required is less than minimum damping force gas is leakingExamine the damper rod and replace the damper if the rod is bent or scored
DAMPER DISASSEMBLY
Release the nitrogen from the reservoir by depressing the valve coreDo not remove th valve until pressure is released