As much as people say they "mask" problems, that's not always the case. For example, my Aprilia run's a small part of the ECU at all times even when shut off. It's got information like clock, mileage, etc stored in there and it does produce a drain on the battery. The only way to counteract this issue is just to leave it on a tender and forget about it. 'Course maybe my bike is just speeeecial. lol