curvy 650 power problem

[adam_castell]

hi,

im having a few problems with my bike, from the begining...

friday i went for a ride out at lunch time, and had to fill up, its not my usual filling station, but i didnt have a choice, well after filling up i carried onm riding (quite hard) and i noticed a drop in power around 9000 and 10000 rpm, the power would just drop at those points and quickly recover. i thought i may have a bad batch of petrol? (it was also damp that morning) i used all of the petrol in the tank and then filled up at my usual filling station, took for a quick test ride and all seemed fine. Sunday i rode a 70 mile trip and noticed the same problem, and it stalled at a set of traffic lights (it was ****ing down with rain at this point??). This morning i rode in to work, and all seemed fine until half way, then i noticed the same problem, then it got worse, and i was low on power across the whole rev range! but this was an internitant problem, sometimes it recovered and i had full power again.

it sounds alot like a miss fire, but then i have never had a miss fire on the bike so i can be positive just by sound, but i guess it could also be a fueling problem?

note, it seems to show more when the bike has warmed up.

any ideas?

cheers

Adam

[adam_castell]

just took the bike out for a ride at lunch time, the problem was there when i started up, and stopped after about half a mile of riding, so i take back my comment..

'note, it seems to show more when the bike has warmed up'

[carsounds_dan]

check the water overflow pipe thingy inside your tank isnt blocked or fallen off. if its blocked itll let water into the fuel which will cause all sorts of funnyness

[boo86]

Sounds electrical. I'd check for good sparks. Check to see if any water has pooled in the front spark plug recess. Got a fenda extenda ? That'd keep most of the sh*te away from the front sparky. Does it pop or bang ? That would indicate unburned petrol igniting in the hot exhaust. It would be unburnt due to a mis-fire.

[adam_castell]

thanks for your help guys, when i got home from work, i stripped the bike down, and found that the supply to the front cylinder coil was loose and giving an intermitant connection. all sorted now :o)