Hello everyone. A new technical video is here for you. Watch it till the end and you will know how to properly adjust petrol setting from main jet needle. It has five stages and i have told in video that how would to select the stage according to mileage conditions. You can get above 50km/liter mileage on 70cc motorcycles and you can also achieve best mileage for 100cc and 125cc motorcycles. Follow the direction carefully and let me know your suggestions below.... Thankyou :-)

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Carburetor: Yamaha YB 100 Royale (Mikuni Corp)