"Hello,I do motorized bicycles in Argentina but by some reason there exist few customers-small motorcycles are popular here,and cheap-I use my bicycle to go work and everything.Idid a LOT of Kilometres and the motors do not broke,these engines are amazing.i want to share some tuning tips:1)I use risin oil 2)I resized the main jet to .55(yes ten less the the average of .65)and the engine revs like a KTM! 3)I made my own jacksaft and reached 40 miles per hour! All these modifications for durability
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