UPDATE2 (1/4/10):
Took it out for 4 days over new years week/weekend and tried a ton of things. Not the fuel filter, not a pressure issue on the fuel tank, moved/checked about every electrical connector i could see on the quad, still no luck. So the question is could the carbs being out of sync cause my issues? I can get the guages for 12.99 each locally to try it just don't want to buy them and do this if i'm not even in the balk park of what could be causing the issue.
UPDATE:
Replaced plugs, and wires along with non resistor wires from VEN (thanks VEN) and had a valve adjustment done. Quad still won't run from 3/4 to Full throttle. Took her out today and the problem still exists. This time i payed more attention to the symptom, and it feels less like cutting out than a complete bog like if for example i was running along at 1/4 throttle and i turned the choke on that kinda bog but at high speed and throttle position. Adding choke didn't fix anything. The whole quad kinda bogs out once u pop over 3/4 throttle and when u back off it kinda catches up and starts moving again. At first it almost seems like an old school MSD type rev limiter that just starts shutting down firining of the ignition at a certain RPM, but in this case the rpm would be way below the rev limiter, and if the belt was slipping i would expect to hear the motor rev which it doesn't.
So please any ideas where to check next? I read the manual and it says there are lots of plastic parts that should be removed form the carbs before using a high flash point solvent for cleaning then compressed air. I don't want to get in too deep but i think i need to take those bad boys off and clean them some how. Anyone got a good how to on that process?
Thanks again!
Ok, quick background I've had this quad for 4 years and it's run like a champ until recently. I haven't made any changes to it in 2 years. Recently it just started to completely cut out at full throttle. I can be cruisin along anywhere from 1/2 to 3/4 throttle just fine but as soon as I pin the throttle down it starts doing this weird cut off type of problem sounds almost like maybe the rear cylindar stops firing all together but not sure about that. I've checked the plugs they're ok, i've got a clean filter, battery is charged etc. Not sure what to check next it's weird because it only happens at full throttle it runs perfectly fine at all other speeds. Also, one side note i know i have the lame ECU or whatever that waits to long to put on the check belt light and when it does you have to reverse the connectors to reset it and it performs like crap until you do, but this time the check belt light isn't on. Any pointers of course would be appreciated.
Took it out for 4 days over new years week/weekend and tried a ton of things. Not the fuel filter, not a pressure issue on the fuel tank, moved/checked about every electrical connector i could see on the quad, still no luck. So the question is could the carbs being out of sync cause my issues? I can get the guages for 12.99 each locally to try it just don't want to buy them and do this if i'm not even in the balk park of what could be causing the issue.
UPDATE:
Replaced plugs, and wires along with non resistor wires from VEN (thanks VEN) and had a valve adjustment done. Quad still won't run from 3/4 to Full throttle. Took her out today and the problem still exists. This time i payed more attention to the symptom, and it feels less like cutting out than a complete bog like if for example i was running along at 1/4 throttle and i turned the choke on that kinda bog but at high speed and throttle position. Adding choke didn't fix anything. The whole quad kinda bogs out once u pop over 3/4 throttle and when u back off it kinda catches up and starts moving again. At first it almost seems like an old school MSD type rev limiter that just starts shutting down firining of the ignition at a certain RPM, but in this case the rpm would be way below the rev limiter, and if the belt was slipping i would expect to hear the motor rev which it doesn't.
So please any ideas where to check next? I read the manual and it says there are lots of plastic parts that should be removed form the carbs before using a high flash point solvent for cleaning then compressed air. I don't want to get in too deep but i think i need to take those bad boys off and clean them some how. Anyone got a good how to on that process?
Thanks again!
Ok, quick background I've had this quad for 4 years and it's run like a champ until recently. I haven't made any changes to it in 2 years. Recently it just started to completely cut out at full throttle. I can be cruisin along anywhere from 1/2 to 3/4 throttle just fine but as soon as I pin the throttle down it starts doing this weird cut off type of problem sounds almost like maybe the rear cylindar stops firing all together but not sure about that. I've checked the plugs they're ok, i've got a clean filter, battery is charged etc. Not sure what to check next it's weird because it only happens at full throttle it runs perfectly fine at all other speeds. Also, one side note i know i have the lame ECU or whatever that waits to long to put on the check belt light and when it does you have to reverse the connectors to reset it and it performs like crap until you do, but this time the check belt light isn't on. Any pointers of course would be appreciated.
