Question about 2004 Honda CBR 600 RR

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Max revs 14000 rpm.

Hi i own a cbr 600rr 04, it doesn't redline, the battery died so i jumped started it and when i flored it it didn't go past 14000 rpm.my cousin had the same problem, (same bike) they changed the fuel pump and the bike was ok but they also changed the battery. i don't think it was the fuel pump, i'm thinking it's the mapping of the ecu. thanks in advance.

Posted by on

  • pangolf2002 Jan 11, 2009

    the rev limiter doesn't come on, it's like i'm letting go of the throttle a bit. if i let of the throttle it goes up to 14500 rpm. the red line limit is about 15200 rpm, that's where it should be.

  • Dick
    Dick May 11, 2010

    What is the redline supposed to be on this engine? 16k max? You are getting close, so close it could be any physical problem like restrictions in the fuel or air system, but it could also be electrical (weak battery or alternator) or an ECU problem too. So many possibilities. I would start by evaluating how many miles are on the bike and doing any scheduled maintenance, checking your air, fuel, and electrical system components closely.

    You do know there is a rev limiter on modern sportbike engines, when you hit it the engine sounds like it's cutting out for a moment? I wonder if maybe the rev limiter is coming on too soon.


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Hey m8,,,just looked at your problem,,to start with i need to uliminate a few things first,,is the bike restricted do u no,, to 33bhp,,that sounds the problem,, the restrictors could be in the carbs,to check this take the top of the carb off pull out the spring, and needle,, on the diaphram check theres no pin holes,by holdin it up to the light,,then on the needle u may see a bit of a plastic spacer or down the inside of the carb,if so then take that out or off,,and repeat this to all 4 carbs,,if nothing is visable,,then check the spark plug caps,and ht wires on the coil,, to be sure change all the plugs if they are not the plugs that should be in the bike,,see spec in a manual,4 the right heated spark plug,, and change the plug caps,try this first m8,, if still not havin any of it, ,shout andil anserw m8,, cheers

Posted on Jan 11, 2009

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