I just put a 14 tooth JT sprocket on the front of my 650l. Woks great for blending 1-2 gear and pulling the front wheel up. But someone told me that I should replace the whole drive system ( both sprockets and chain ) at the same time or the new srocket will eat up my chain. Is this true ? My bike only has 400 original miles, 200 when I bought it in April, So I wonder if my chain is still new enough that it won't matter. The Honda service manual says to change the chain after two years regardless of mileage. Has anyone lsot a good chain due to adding new sprockets ?