Question about 1997 Honda CBR 600 F(3)V

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I have a 1997 honda cbr600f and the fuel is running to rich at about 2-5k rpms then runs fine for the rest of the range, at this range it makes a big lag spot at low speeds, however at high speeds runs great! Also when rolling of it has now started to blow blue flames out the exhaust (looks cool but is it damaging)? Just had new after market headers (streetfighter( not sure if that helps with the make) and got a new K&N filter put in which did help a little but not enough? Now i have been reading a few forums and was thinking could it be something to do with the ram air system that comes open after 30 mph because it feels like it all happens bellow this speed, if so is there a way to keep the ram air open even at low speeds??

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Try a fuel additive this might burn off any excess on the piston heads and even out the fuel to make it a little more lean.

Posted on Sep 12, 2009

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NSR timing


The Honda NSR125 doesn't have two cylinders - it has only one cylinder. If you have an NSR125 and it sounds like that, then you're "four-stroking" in the middle of the RPM range. "Four-stroking" (not firing exactly 50% of the time) is caused by too rich a mixture, which tells me that either your air intake has a problem or your carburetor wants more attention. If you only cleaned it by pouring carburetor & choke cleaner into the fuel tank, that's probably not enough - you'll probably need to disassemble the entire carburetor and run carburetor cleaner spray through every port & jet or put it in a dip tank until it's dead clean inside.

Since it seems to clear up at higher RPMs, it's probably not your intake - that's just get worse & worse at higher RPMs. I've gotta' say I believe your carburetor's still not clean inside.

Since it's running rich below 4KRPM, it should hurt anything except your pride & your bike's performance. It should NOT seize the engine - that'd happen if your fuel mix was too LEAN, but yours is too RICH.

Nov 05, 2013 | Honda NSR 125 Motorcycles

2 Answers

At lower RPMs it is rough running with slight amount of smoke until warm and there is a loss of power at the bottom end of the gears. Once a certain rpm is reached (no tach) it snaps to life. New plug


What color is the smoke?
Black means running rich.
Gray or white is coolant
Blue is oil.
This shounds to me like a fuel system issue. Injectors might be bad

Jan 23, 2013 | 1997 Honda Civic

1 Answer

My 13 hp honda power washer has a miss when it's not under a load. Is it a fuel or spark problem ?


Most likely fuel / plug. Easy to check. While running unloaded and miss-firing, try applying the choke just a little to increase fuel mixture (make run slightly rich), if clears may need carb kit. If it gets worse with slight choke running rich or plug faulty. Before you change parts try using premium fuel. If runs better problem solved.

Nov 02, 2010 | Honda Garden

1 Answer

Runs great but will quit running , smell gas also


Sound like a rich by a long way; are you check if have smoke in exhaust? Black smoke is fuel, blue smoke is oil.

Also, your injectors are to big and is running rich.

Jul 15, 2010 | 1997 Jeep Grand Cherokee

1 Answer

I have a 2002 CR 125. Runs great but has black fluid that comes out of tail pipe after running. I feel it is running too rich. What should the air/ fuel mixture screw be set at?


The mixture screw is used to get the transition from idle to throttle up smooth, and not to bog.
Sounds like your jetting is to rich, or too big. Read your plug as it's probably black. Then go smaller on your pilot jet, run it and read it again. Make sure you run 32:1 mix, and jet the bike to match this.

Dec 10, 2009 | 2002 Honda CR 125 R

1 Answer

1988 5 speed Honda Accord


Ensure your spark plugs,wires (ignition coil and spark) and your filters (air and fuel) are within 2 years of installation It's erratic at 800 rpm as the engine is cold and they like the 2200 range for 3 minutes before they kick down on their own. Press the pedal twice before inserting your key. The owners manual states depending on the outside temperature, the engine will require more priming. Update if possible.

Oct 25, 2009 | 1988 Honda Accord 4 Door

1 Answer

Just replaced distributor unit for a no start problem. car now starts fine. In first and second gears only car completely cuts out around 2500 rpms. until you let off the gas, but never dies. car also...


Could be dirty fuel filter or a leak in the gas tank seam messing with your fuel pressure. Another cause could be the fuel pressure regulator.

Sep 25, 2009 | 1991 Honda Civic

1 Answer

I have a 1997 honda cbr 600 and when in top gear pushing rpms over 7K for over 10 min that bike starts losing power, i was pointed in the direction of the electric fuel pump but where can i find the relay...


my bike had the same problem but it started at 8k and wouldnt make over 100...i took the carbs apart and found that the #1 main jet fell off into the bowl. if it was a fuel pump i think you would have a problem even in a lower rpm range.

Sep 14, 2009 | 1997 Honda CBR 600 F(3)V

1 Answer

97 accord 4 cyl shuts down at 3000 rpm


run engine codes, had same issue once before it was bad computer good luck

Jul 06, 2009 | 1992 Honda Accord

1 Answer

86 Shadow Running rich?


best thing to do is reset mixture screws to standard then get the carbs balanced,it will make a big difference

Jun 08, 2009 | 1986 Honda VT 500 C Shadow

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