Rite, ive got a problem with my motorbike, it started when i went through quite a big puddle, shortly after that my bike backfired quite badly, smoked alot, then stopped altogether. i got it going again and got it home. Now on my way to work everyday it wont go over say 35 ish, if i pull rite back on the throttle it jerks, looses power, sorta feels like im running out of petrol. Ive noticed when i go down a big hill i can go flat out but the whole bike vibrates quite badly, but after the hill my bike seems to go back to normal, even if i slow down and go again. then the next morning it happens all over again! does anybody know what the problem is? i spoke to a bloke at a garage and he said to drain the float chamber on the carb, i done that and it ran fine for about 5 miles or so and then started playing up again? thanks..