For a single cylinder motorcycle stock exhaust is the best,loud and aftermarket exhausts sounds great and only suits on superbikes(specially inline3 and inline4).
Govt now banned all the modification which people are doing like exhaust... You can only install thode exaust which are approved by RTO only...and from April rules are getting more worst so be careful
are bhai ye comment krne walo ki mt sun, tujhe exhaust psnd hai to mast se chala. Jo log khud challan k dar se exhaust ni lga pate wo dusre k modification dekh k jalte rehte hai. Baki mn sbhi ka krta hai ki akrapovic lgwaye