Giro d'California 2011 approaches!

I have about a week left to prepare for the 2011 Giro d'California. It is based in Visalia this year, so I'm betting we get some good runs in the Sierra Nevada Mountains this year. But of course the route isn't divulged to us until the event starts.
Last year, although I still managed to claim 2nd place I had some real mechanical problems that I need to address this year. I finally fixed my charging issue from 2009, but on the second day my ignition switch failed. So that needs to be addressed. And the bike needs all the usual servicing, oil changes, lubes, new tires. The front headlamp failed and a shock might be leaking. And of course it occasionally locks in top gear.
That last issue is the one I may not be able to repair, as it never seems to happen outside of competition. It's actually been happening for years, even back in Italy during the 5 day Motogiro. The engine needs to be very warm (a couple hours of running) and then  run it top gear for a long hard full throttle run. That seems to be the only time it sticks. Typically I end up pulled over and fuddle with the lever a bit and it downshifts and I am on the way. Of course this never happens when I test it at home, and I fear attempting a fix without really examining the problem. I think it's an issue with the ratchet mechanism that is accessible just inside the engine cover. But there is always a chance its an issue inside with the shift forks / barrel, and that would be a real problem.  Lets hope it happens again soon (like this weekend) so I have time to attempt a fix, or not at all until after the giro!