Ya im using 20w40mnow its good but once the engine gets hot the top end reduces to 108 it dosent get above it....while on 20w50 i used to touch 115 quite easily......
other points are ok but i guess 100/90-17 is a thinner tyre than the stock rtr 180's 110/80-17...so how will it reduce the top end and mileage bro....







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