hey all i have got a new to me motorcycle and the motorcycle bogs down when i let the clutch out in first gear , I have been riding for over 40 years now , i do not think it is the engine the bike runs well. but maybe the sprockets have been changed for hwy riding the man i purchased it from said he was doing some hwy riding. but i dont have his number any mare. can any one tell me what the original gearing was, the front and rear sprocket size. and since i'm bogging down do i want to increase the size of the front sprocket ?