Hello chinmay,i have p150 classic model,recently i have chnged my carburettor to bs29 p180 ug3 model,it has 117 main jet,17.5 pilot jet i have using main jet of 110 because i feel 117 makes mixture much richer,problem is while starting in morning engine start but it refuse to go above 3000 rpm at part throttle,and i realize in ghat it lag some power in gradiant,cant find main jet of size 12.5,15 how can i get from you??i ride mum-pune most time.....is that possible to get power perfomance from that bs29(p180 ug3 carb)i want to keep my steed with me forever