Changing battery How do you get to the battery to change it on a 2006 Yamaha YZF 600R?

Check your rectifier. Follow alternator wire, you will find a small probably square device. isolate it. Test it with diode checker or ohm meter. electric should pass one way but not the other. There will probably be two diodes in the device - one or both could be shorted (pass either way or neither way) Id check it before plunking down the $ for a new one. Could be your alternator is not putting out. Is your battery fully charged? No power into the alternator = no power out of the alternator. Alternator shorted - well time for a new one. Though this is not the weak link in a charging system. Could remorely be the voltage regulator ... still id look ata the rectifier.