I just bought a 15 tooth front sprocket for my 03' yz450. So I will have a 15/49 combo. But it sure seems a bit heavier than the 14 sprocket. So I was thinking about drilling a few holes in it to decrease some rotational weight. Would this throw off any balance in design that went into the sprocket? What I mean is does the holes have to be strategically drilled to maintain a rotational balance? I know it may seem weird but could be important so I dont put unneccessary strain on transmission parts,etc by having a lopsided sprocket spinning. thanks for any input.