Hardik Rastogi  (Dec 19, 1999)  from Meerut, Uttar Pradesh, have made a record by making a bike with average mileage of 45 Km/L at home in a short period of nearly within a month at this young age with following features, LPG as a fuel, Dual silencer, 100 cc engine, Drum brakes system,  LED headlights.

http://indianachieverbookofrecords.com/hardik-rastogi-created-new-model-home-made-bike/