broombroomsniper
New Member
depend on the load of the mc and purpose. common used 15 /40 15/41 15/42 15/43 up if you have heavy load. if you feel comfortable with performance then thats the right spocket combination for you. additional 13/14/16 front sprocket. i think RS/LS sprocket can be use if you dont want expensive sprocket for testing combination... hope master and veterans user help us more about sprocket combination thank you.
for me ill stick with this combi thanks 
.... we're just same weight but i stuck on 120kph on 14/38 sprocket and my 5th gear has less power.... but in your case 15/40 has lower sprocket ratio and hit 140kph? 

... unless your engine have some little mods
