Two areas where I need some help. On the front fender, the portion nearest the frame on top, there is oil on it and I cannot fine where it is coming from. It is far enough down the fender that it does not look like it is coming from the steering steem and no oil on the frame, any ideas. Also on the vent tube, can I take out the vent valve and just use the vent hose without the valve as other bikes do. I was jumping through a set of doubles and the bike kept dying. A friend said I did not know what I was doing and tried, same thing. When he took off the gas cap it shot up and presue was let off. Put his vent tube on and I had no problems, he does not have the valve, so is it okay too run without it? thanks alot.