tps evaluating for ii issues

[dave]

Update – EVAP hose removal test: Performed the EVAP hose removal test tonight. Bike started normally (normal cold engine, high RPM idle), and I rode around the neighborhood to warm the engine up. Mostly low speed, 1st, 2nd, and 3rd gear only. After about 6 miles the low (700 RPM, slow return to 1,050 RPM) idle returned, so I immediately went home to perform the test. As I was getting the bike up onto the center stand the idle crept back up to 1,050 RPM. I pulled both the EVAP hoses off simultaneously, and the idle did a very, very slight increase (maybe 50 RPM) for only an instant (almost unnoticeable) change, and returned to 1,050 RPM. I blipped the throttle several times, and each time it returned to 1,050 RPM. Just 60 seconds earlier, before the EVAP hoses were removed, the idle would drop to 700 RPM each time I blipped the throttle. I plugged both hoses back in simultaneously, and the RPM change was the opposite from when the hoses were removed - this time the RPM dipped slightly (maybe 50 RPM), but quickly returned to 1,050 RPM. I blipped the throttle several times, and each time the engine returned to 1,050 RPM. I found this very interesting, because before I removed the EVAP hoses the RPM would drop to 700 RPM each time I blipped the throttle, but now it was not doing this. I repeated this exact, identical process four times, and each time the results were identical. I would have liked to have ridden the bike again but it was getting late. I will ride the bike tomorrow and repeat this test, and also ride it after removing the EVAP hoses.