Yamaha YZ250X 2022 Owner's Service Manual

CHASSIS10-11TIPGenerally a stiff spring gives a stiff riding feeling.Rebound damping tends to become weaker, re-sulting in lack of a sense of contact with the roadsurface or in a vibrating handlebar.EAM30174FRONT FORK SETTING PARTS• Front fork springTIPThe I.D. mark (slits) is proved on the end of thespring.EAM30175REAR SUSPENSION SETTINGThe rear shock absorber setting should be madedepending on the rider’s feeling of an actual runand the circuit conditions.The rear suspension setting includes the follow-ing two factors:1. Setting of spring preload• Change the set length of the spring.• Change the spring.2. Setting of damping force• Change the rebound damping force.• Change the compression damping force.EAM30176CHOOSING SET LENGTH1. Place a stand or a block under the engine toput the rear wheel above the floor, and mea-sure the length “a” between the rear wheelaxle center and the rear fender holding bolt.2. Remove the stand or block from the engineand, with a rider astride the seat, measure thesunken length “b” between the rear wheelaxle center and the rear fender holding bolt.3. Loosen the locknut “1” and make adjustmentby turning the adjuster “2” to achieve thestandard figure from the subtraction of thelength “b” from the length “a”.TIP• If the machine is new and after it is broken in,the same set length of the spring may changebecause of the initial fatigue, etc. of the spring.Therefore, be sure to make reevaluation.• If the standard figure cannot be achieved byadjusting the adjuster and changing the setlength, replace the spring with an optional oneand make readjustment.STD spring rate(N/mm) 4.3TypeSpringrate(N/mm)Part numberI.D.mark(slits)SOFT 3.9 1C3-23141-A1 I4.0 1C3-23141-B1 II4.1 1C3-23141-C1 III4.2 1C3-23141-D1 IIII4.3 1C3-23141-E1 IIIII4.4 1C3-23141-F1 I-I4.5 1C3-23141-G1 I-II4.6 1C3-23141-H1 I-IIISTIFF 4.7 1C3-23141-J1 I-IIIIStandard figure90–100 mm (3.5–3.9 in)