pag stock hirap, 15-42 combi, walang dulo, before im using stock 14-38 hanggan 110kph lang top speed ko all stock pati muffler, tapos pinalitan ko open pipe and then tune the carbs 100kph lang takbo ko hirap pang umabot, then i use 14-41 combi sprocket umabot 110kph in short time pero nag limit...