agayn

grate this in't it , but I carnt get my head rownd the 15-42 set up , rideing the bike hard rownd my fave twistys ,the bike is reving so hard , I feel like I am going to through a valv aspesherley wen yousing engin brakeing . eney one out there yousing 16-43 , as this I think wood be just right...