OK so I have been working on my bike replacing parts. whille doing this my friend who was heloing put the battery in oppisite poles and it was on there for about a minute and we tried to start it in that time. so we switched them anfd there was no power at all to the bike. so we checked the fuses and the starter solenoid fuse was blown so we swapped it out for another 30a fuse. at this point I have my exhaust off down to the cat. I have the baffle? off, the butterfly valve in the exhaust. and i originally had the electronic module controling that out. but the bike wouldnt start. so i figured it was because of the module. so i plugged it back in and jusat removed the cables to it. Now i start it and it starts right up. runs for about 5 seconds then just shuts off. anf the Fi and OIl light are on. the bke has oil. and i did have the gas tank off before hand. so i double checked all the connections and such and fuel lines. and everything was good. no leaks. so i am clueless on what it is now. any help? anyone whose had this same problem while doing there own exhaust swap?