7-13SETTING TUNEC720000CHASSISEC71P002Selection of the secondary reduction ratio(Sprocket)Secondary Number of driven sprocket teethreduction =ratio Number of drive sprocket teethreduction ratio>9It is generally said that the secondary gear ratioshould be reduced for a longer straight portionof a speed course and should be increased fora course with many corners. Actually, however,as the speed depends on the ground conditionof the day of the race, be sure to run throughthe circuit to set the machine suitable for theentire course.9In actuality, it is very difficult to achieve settingssuitable for the entire course and some settingsmay be sacrificed. Thus, the settings should bematched to the portion of the course that hasthe greatest effect on the race result. In such acase, run through the entire course while mak-ing notes of lap times to find the best balance;then, determine the secondary reduction ratio.9If a course has a long straight portion where amachine can run at maximum speed, themachine is generally set such that it can devel-op its maximum revolutions toward the end ofthe straight line, with care taken to avoid theengine over-revving.NOTE:Riding technique varies from rider to rider andthe performance of a machine also vary frommachine to machine. Therefore, do not imitateother rider’s settings from the beginning butchoose your own setting according to the level ofyour riding technique.Standard secondary 50/14 (3.571)reduction ratio
