Question about 1997 Honda CBR 600 F(3)V

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1998 CBR 600 F3 engine bogs

Just bought a 98 CBR 600 f3 it was wrecked and the previous owner tried to change into a Street fFghter. When I got it home it would not start.... I have got it running and it will idle fine first gear is good but when shifting into second I lose all power and the bike bogs ... I have cleaned the carbs but know that it is a carb problem..... it can be the floats are not working correct or air-fuel ratio needs adjusting, any suggestions will be appreciated

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  • Honda Master
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Hey Mata,
You have purchased a project that may be complicated... Internal combustion engines need only three things to run..(if it was assembled correctly)
1. A properly timed spark
2. Compression
3. Proper fuel ratio
..NOW - First, You need to run a full compression check on all cylinders.. this will eliminate a compression issue that would prevent the engine from running right! Compression should be 120+psi MINiMUM with the throttle held wide open and the engine spun for 6-8 seconds.(on each cyl) ..If you have more than 20PSI difference between ANY two cylinders you have a problem.. and this MUST be repaired before proceeding - Next, take the carbs to a qualified professional and have him check, clean, and set the carbs... once you get them back, make sure you have fuel going to the carbs..If all is correct, and you have installed NEW spark plugs.. it should run..and run well..

Posted on Jul 03, 2017

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  • Honda Master
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Hi, Matalicachic Pinkfloydguy here, engine "BOG" is mainly caused by a rich air and lean fuel condition but it can also be caused by a lean air and rich fuel condition this situation rarely occurs and is only caused by the misinformed weekend warrior that owns a toolbox.
The more you open your throttle the more vacuum you are creating in your carburetor venturi and your intake manifold. When you are operating at higher RPM any unmetered air that leaks into your system can become more obvious.
Unmetered air is air that is getting into your system after the fuel has been delivered. If you have unmetered air getting into your system between the butterfly/slide of the carburetor and the cylinder head this will create a lean condition.
All of the rubber components of the fuel system like vacuum hoses and intake manifold that you mount the carburetor to are made of rubber. If none of these components have been changed out they are more than likely highly degraded and probably cracked in places to allow unwanted-unmetered-contaminated air into the combustion chamber. Check all of your vacuum lines and vacuum plugs for carburetor synchronization. The vacuum plugs are in the head just after the rubber intake manifolds. The petcock has a vacuum line as well as part of the emission system.
1. Check the intake manifold for cracks.
2. Ensure the bands used to tighten the manifolds down on the intake are secure and have not bound up the manifold.
3. Make sure air box fittings are not warped and fit completely over the carburetor.
Your airbox is metering air and is the first step in a process of consuming air and fuel. The system requires the resistance of the air filter in order to get the proper vacuum to "SUCK" the fuel out of the float bowl and create the proper venturi effect.
Improper mounting and sealing of the airbox will create a small lean effect. This might seem like no big deal but you are inviting dust and debris in your engine that is doing slow damage by not having proper fitment. Fix it so you know it's not contributing to your issue. Pick the low hanging fruit first.
Do not go and start adjusting anything at this point. It ran fine before. There is something wrong with the assembly or a component. Do not adjust your floats. Get it back to where it was. The moment you start tweaking everything is the moment you lose OEM settings which are a must have for fine tuning and maximum performance.
Fine tuning your carburetor and multi carb syncing come at the very end following the proper procedure established by the Carburetor Gods.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
http://motodataproject.com/product_info.php?products_id=156
600 F3 bogging dying CBR Forum Enthusiast forums for Honda CBR Owners
96 CBR600 F3 engine bogs out spark
Honda CBR600F4I 2001 Service Manual
http://www.partsfish.com/page/oem-parts-for-honda
Honda CBR600F Owner Manual

Posted on Jul 03, 2017

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Posted on Jan 02, 2017

hotratchet
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SOURCE: cbr 600 f3 will not start

wow, 7 years without use! try to check if the fuel pump motor is still working... also check the fuel lines if its clogged.. I hope you get your bike up and running again... feel that adrenaline rush when going 100+mph.. hehehe.. have a good one bro...

Posted on May 26, 2009

  • 47 Answers

SOURCE: 96 honda cbr 600 f3

hi would be good idear to also check spark and and timing also if you just got bike give it a good service this includes fuel filter

hope this helps

Posted on Jun 18, 2009

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hi would be good idear to also check spark and and timing also if you just got bike give it a good service this includes fuel filter

hope this helps

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