Periodic maintenance and adjustment8-1912345678910111213used or have only been used occasion-ally. Cracking of the tread and sidewallrubber, sometimes accompanied bycarcass deformation, is an evidence ofageing. Old and aged tires shall bechecked by tire specialists to ascertaintheir suitability for further use.WARNINGEWA21232 The front and rear tires shouldbe of the same make and de-sign, otherwise the handlingcharacteristics of the motorcy-cle may be different, whichcould lead to an accident. Always make sure that the valvecaps are securely installed toprevent air pressure leakage. Use only the tire valves andvalve cores listed below toavoid tire deflation during a ride. The tire air valve original posi-tion is with the valve cap point-ing to the right side of thevehicle, perpendicular (90 de-gree right angle) to the axis(center line) of the wheel. If thetire air valve becomes mis-aligned, do not twist it back toits original position by yourself.Otherwise, leakage may occur.Have a Yamaha dealer inspectthe valve.After extensive tests, only the tires list-ed below have been approved for thismodel by Yamaha.WARNINGEWA10601This motorcycle is fitted with su-per-high-speed tires. Note the fol-lowing points in order to make themost efficient use of these tires. Use only the specified replace-ment tires. Other tires may runthe danger of bursting at superhigh speeds. Brand-new tires can have a rela-tively poor grip on certain roadsurfaces until they have been“broken in”. Therefore, it is ad-visable before doing anyhigh-speed riding to ride con-servatively for approximately100 km (60 mi) after installing anew tire. The tires must be warmed upbefore a high-speed run. Always adjust the tire air pres-sure according to the operatingconditions.Front tire:Size:120/70ZR17M/C(58W)Manufacturer/model:BRIDGESTONE/BATTLAX HY-PERSPORT S22FRear tire:Size:190/55ZR17M/C(75W)Manufacturer/model:BRIDGESTONE/BATTLAX HY-PERSPORT S22RFRONT and REAR:Tire air valve:PVR251