was out riding an 06 636 last night (one of the shops used bikes), and after about 40 mins it cut out like i ran out of gas even though i had a full tank? i believe its the fuel pump starting to take a shit but idk. if i turn the key on and off and prime the pump a few times it would fire up for a few minutes and then die again. any ideas? the bike has less then 9000 miles on it.