1986-1989 Honda TRX250 FourTrax 250R Service Manual, Page 167Get this manual
REAR SUSPENSION Fill the reservoir with nitrogenSTANDARD PRESSURE: '86: 1,961 -2,256 kPa (20-23kgcm2, 284-327 psi) After '86: 981-1,275 kPa (10-13 kgcm142-185 psi)
Theshock absorberisfittedwith agas-filed resewoirUseonly nitrogen gas topressurize the shock absorberTheuse ofan unstable gas can cause afire or explosion resulting in serious injury
Check the damper compression force is within specification
(page 12-4)
SPECIFIED FORCE: '86: 23.1 -38.5kg (50.93-84.88Ibl 'S7: 11.6-19.2 kg (25.57 -42.33Ibl After '87: 10.9-15.6 kg (24.03-34.39 Ibl Install the valve capInstall the spring, spring seat and spring seat stopperTurn the spring adjuster nut until the spring length is as specified
DECREASE THE SPR'NG LENGTH B: INCREASE THE SPRING LENGTH
(1) LOCK NUT STANDARD SPRNG LENGTH:
'S6: 241.3 mm 9.50 in)
'87: 220.7 mm (8.69 inl