I bought a 2000 yz250 that has a non o-ring chain on it. It's about time to change it. If I go with an o-ring will I notice a reduction in power due to drag, like I did on my kdx200? The yz is stock and I am happy with the power but I don't want to slow it down any. Should I consider changing form 14/50 to 14/51 to compensate for the drag?