Hey everyone, i know that this is a cbr forum but i also have a 06 ninja 250 that just wont cooperate. i was about 5 miles from home when it all started. everything was fine at first, then the bike has trouble at 5-7 thousand rpm and starts to bog and make a choking noise. I dont know if there are iridium plugs in it or not and if thats even the issue. I dont know if the timing is off or what but it could be anything. Its only at 5-7 thousand rpm and it wont go past 7 at all now so it sucks and i really need advice. thanks so much to all that help
--Jake

 

plugs aren't the issue if it runs under 6k. Does is run well under 6k? Does your dash flicker at all? If not I would look at fuel related issues first... pump, fuel lines, vacuum hoses... whatever your bike has. Run with the gas cap open as well, see if that does anything.

 

Yeah true, when I had plug problems, you could feel it missing under 7k.

Can you describe the "bog" and "choking noise?" Is it coming from the engine, the air duct, the exhaust, is it low, high, etc etc etc

 

thanx for your help man. at 5-7k it like loads up and feels like the ignition is retarted. no smoke out of the exhaust or leaks. you can hear it through the exhaust

 

Hey guys, i had thé same problem past week , it suddenly stopped at 6000 RPM. (Cbr1000f) . Plugs where long time not in use, at least for two year. I think that oxidated thé plugs and they gave a weak spark witch created a rich mixture. After only one testrun down thé street they turned black witch created thé problems are higher RPM,s. Changed plugs, problem gone...... It was like thé bike had An RPM limit , it could not fire up all thé fuel at rapid time. Starting up was not a problem but soon Will if keep trying.

 

These guys have been gone for over 10 years. Good to hear that you got your problem sorted out, but let's keep things a bit more current.

 

this topic ,it showed up on my phone as a related topic under my own topic, , had not seen the date, , thought i could help ,

 

It happens a lot with mobile. I think you can turn off the show related threads option.