●Ifthenthecoursehasmanycornersoruphillsoriswet,thesecondaryreductionratioshouldbein-creasedsothatgearshiftingandaccelerationaresmooth.●Sincethespeedmustbechangeddependingonthegroundconditiononthedayoftherace,besuretorunthroughthecircuitpriortoaraceandtunethemachineaccordingly.●Ifthereisalongstraightportionofthecourseonwhichthemachinecanberunatmaximumspeed,themachineshouldbesetsothatthemaximumspeedisdevelopedtowardtheendofthestraightcourse,butcareshouldbetakennottoover-revtheengine.SmallsprocketLargesprocket●Sinceitisdifficulttosetthemachinesoitisbestsuitedforallportionsofthecircuit,determinewhichcircuitportionswillhavethegreatesteffectonlaptime,andtunethemachinetothesepor-tions.Confirmyoursettingsbyrecordinglaptimesaftereachchange.Inthiswaythemachinewilldeliverbestperformancefortheentirecircuit.198TUNINGGearingSelectionoftheSecondaryReductionRatio(RearSprocket)RearSprocketSelectionAccordingtoCourseConditionsFastCourseManyCurvesorHillsSandyorSoftGround●Ifthecoursehaslongstraightportions,thesec-ondaryreductionratioshouldbereducedsothatthemachinespeedcanbeincreased.
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