@ Junid
its much depend on ur riding style..mean how u ride a bike, extra breaking..(slow and then speeding up), Correct air pressure in tyres..and in last but having much importance tht where u got tuned ur bike ??
if u tune bike frm Suzuki Co., than u can ask suzuki's mechanic to set the correct averge, but in case of some local mechanic..he cant do except running carburator or ring piston..(coz he will definently set mixture to very low,tht will harm to ring piston..) so..