Question about Honda CBR 600 F(4)i Motorcycles
I have a 96 cbr 600 f3 the issue im having is it was running great about a month ago and I stupidly took the carbs off to clean them and do a tune up well I put it back together and it starts and revs great it hits redline and everything so I went to ride it today and it ran fine in first gear and as soon as you hit second no matter what rpm it starts jerking and sputtering like its going to run out of gas if you stop it stalls it starts rite back up and does fine in first again I also put a k and n filter on it any help would be great thanks all
Posted by Anonymous on
Hi, Anonymous if you have changed your fuel delivery system, air filter size or flow rate, mufflers or exhaust system or a significant change in altitude your carburetors need re-tuning and if your fuel system (gas tank, filters, fuel valve and carburetor) is contaminated with ethanol sludge, varnish, rust, dirt, water etc. or your bike has been sitting for months or years without running these components must be "PROPERLY" cleaned and reassembled "CORRECTLY" before any adjustments can be made. Tuning your carburetor is fairly simple once you understand the basic principals. You engine is a simple airbox sucking air in and blowing it out, it is finely tuned at the factory for maximum performance once you upset that delicate balance by changing air filters, camshafts or exhaust systems your performance may go down the and the engine may run poorly, you need to compensate the air-fuel mixture in the carburetor in order for the engine to run smoothly and at peak performance. If you are running multi carburetors you need to sync them first and make sure your air cleaner element is clean and dry for paper elements or lightly oiled for foam and meshed elements and properly installed. Here is how and where you compensate trouble: "TIP" if your engine "BOGS" your not getting enough fuel.
1. Closed to 1/8 throttle is managed by the air screw and pilot/slow jet.
2. 1/8 to 1/4 throttle is managed by the air-screw, pilot/slow jet, and throttle slide.
3. 1/4 to 1/2 throttle is managed by the throttle slide and jet needle.
4. 1/2 to 3/4 throttle is managed by the jet needle, needle jet, main jet, and air jet.
5. 3/4 to wide open throttle is managed by the main jet and air jet.
6. Wide open throttle is managed by the main jet.
If you are running lean, spark plug electrode color is white, engine runs hot and feels like it is starving for fuel you need to go up on the jet size or move the c-clip down one notch. If you are running rich, spark plug color is black or dark gray, engine runs cool, and bogs down when accelerating you need to go down on jet size or move the c-clip up one notch. When your carburetor is properly tuned for maximum performance your spark plug electrode will be a light tan color like coffee with cream. If you prefer fuel economy over performance you can go down on main jet sizes until a satisfactory level of lower performance is acceptable versus MPH, your spark plug color will be whiter and your engine will run warmer. These tuning adjustments will only make improvements if your intake and exhaust system have no air leaks or sealing issues and the entire electrical system is in proper working order and you have no mechanical issues. 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.
Carburator Theory and Tuning
1996 1998 Honda CBR600F3 Service Manual Moto Data Project
Honda CBR600F Owner Manual
Posted on May 03, 2017
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Posted on Jan 02, 2017
i have a '98 f3 stuntbike. they are very tempermental with air intake. make sure your air filter is clean and induction to the engine not clogged.
Posted on May 10, 2010
SOURCE: my 93 EX 500 bogs at 5k rpm
Hello you have a heavily rusted fuel tank, i would suspect the fuel petcock is being restricted.
As for the fuel tank here is a link to a product to remove the rust from your tank.
I have used it and it gets rid of it excelent product.
Posted on May 25, 2010
SOURCE: 1995 Kawasaki GPZ 1100 -
In that case the jets or the valve from the bowl are clogged by gums. Take the carburetor out again, dismantle it completely, soak it in cleaning fluid then blast every jet and canalisation with compressed air. Put it back together, adjust it properly, (be very careful about the fuel level in the bowl) and try again. You should adjust the carburetors using a flow meter for best results. Also replace the air filter with a good quality one
Posted on Sep 04, 2010
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