Today I was riding about, than I noticed my bike started to bogg down as if it was runing out of fuel and really have some power problem, it was starting to cut out, so I put the clutch in, and the motor just died! so I pulled to the side of the road, and tried to start it, it started than died again, rinse repeat 3 times until it kicked over, so at this point I figure the carby was just flooded, so I took off, than a little while latter it happened again, this time it was much harder, it would refuse to fire over, I tried choke, prime, adding more gas, nadda, so i took my helmet off and pushed her a few miles. Than I reached a hill, it was too much for me, so I tried again and again and again! and than it fired over! I let it idle for a while as I was trying to undo my helmet from the holder under the seat, than it died as if it was switched off, crap, so I do it again, it fires up, I quickly take off and it goes for a few miles and again, starts boging down and dies again, I push it to a footpath and I wait, (kudos to the kind lady in the house who gave me a bottle of water ) it finally fired over again, and I make it to fuel station and fill it with 98 octane premium fuel, I start it up and it fires up one start, I rode around for 40 minutes with out a miss beat, could it of been the 91 octane fuel before? or some carb problem?