You need to hold the bars with the thumb and index finger. use the rest of fingers to pull clutch lever. That arch in lever keeps you from mashing index finger. It may be awkward at first, but thats how I do it, and can hold on to the 500. Alot of people do different things, but when really ripping it, you are clutching the crap out of it, leaning forward and back so much that you need firm grip and almost automatic clutch response.