hi there my name is Ben. i have a 96 cbr that has been set up for stunting. it has a 60 tooth rear sprocket and has no fairings. i bought it as is and it ran great for about 3 days then one day i was on the interstate doing about 65 or so and it started breaking up it felt as though i was turning off then back on again. so i brought it home for the next few days it would do a little here and a little there as the days went on it got worse.

as of now i have:
replaced the plugs
cleaned the plugs again
new carb holders the old ones were really cracked
cleaned the carbs

so please help me out here it sux having this bike that i cant ride!!!!!!!!!
thanks ben

 

If it was used for stunting the first thing I would do is check the tire pressures and the oil level. Probably won't help your cause, but those guys change things to make stuntin easier. Second,for your problem, I would look at the wiring, specifically the switchgear that has the engine kill switch. It wouldn't surprise me to find it damaged there. Otherwise check all your wiring, make sure you have clean and tight connections and good grounds.

 

also check your fuel pump, and the associated wiring to it. they can mimic this behavior when they're on the way out too.

 

+1
I would check the kill switch/kickstand switch..check wiring.

 

Is the top of the tank crushed? You may have an fuel tank vent that is blocked. Try opening the gas cap when the problem starts if you here it sucking air when you pop the cap check the vent lines for kinks.

 

awesome thanks for the help i will check all of this and let u know how it goes

thanks for the help if u can thik of anything else lmk

 

oh and there is no fuel pump but it ran fine with out it so........

 

no fuel pump? the bottom part of the tank is below the carbs. try filling it to the top.

 

an F3 should have a fuel pump to take full advantage of how its set up to run/work.

 

i agree it should have a fuel pump but it ran without so i think that it is something else none the less i am going to get one to eliminate that as a possible cause

oh and the problem happens when trying to cruise say at like 40 i have tried to ride in 4th 5th and 6th all the same problem so it dosent matter what the rpms are.... now if i get on is say through 1st 2nd and 3rd it seams to be ok....

thanks again guys i am going to work on it tomorrow ill let u guys know