More than looks however it is also the new unit construction engine, Uce, which could be given credit for the classic 350 popularity the same yer wen the classic 350 and 500 were lanchuded the company decided to replace all models in it product range with the new Uce twinspark engine plaotfom the advantage over the older engines is that clutch and gearbox in the new mill have been placed in the same unit and it also has lesser moving parts this royal Enfield says has improved efficiency as well as moving and fast running bikes ever.