I just got back from a ride at Grizzly flats up in the northern California Sierra mountains with Howard huge. Conditions were perfect. About two hours into the ride my bike quits, It felt like it ran out of gas. I verified gas and air delivery to the engine. The problem seems to in the ignition. I pulled the plug, grounded it to the frame and kicked the bike over. No spark. I tried it with other plugs, same result. All electrical connectors appear intact. Hopefully the manual has a troubleshooting section for this. Does anybody have any ides?