I bought a 2000 XR650R three months ago, drove it around the block, and then tore into it. I went on my maiden voyage today (55 miles in the Sierras, 80 degrees) and about half way into the trip we hit a rocky, rutted, technical section. After about 10 minutes of climbing and pawing at a near idle (rekluse clutch) the bike boiled over terribly. No airflow over the rad's. I've installed a 1.6 bar cap, new Napa thermostat (two small holes drilled in the flange), and Fluidyne radiators. Any input or is this typical despite my "fixes"?