CBR misfire? - TwoWheelForum: Motorcycle and Sportbike forums
 
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post #1 of 10 (permalink) Old 08-16-2006, 03:02 PM Thread Starter
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CBR misfire?

Okay, I'm looking at a different cheap bike that needs help. It's a '94 CBR600 and the guy says it has a minor misfire. He replaced the plugs, wires and carb. He says it starts right up and is a daily driver. I can't think of anything else that could fix a misfire that he hasn't already done except for the piston seals and rings?
Anybody else with some ideas? Sorry I don't have more info.
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post #2 of 10 (permalink) Old 08-16-2006, 03:04 PM
 
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Coils could be bad.
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post #3 of 10 (permalink) Old 08-16-2006, 03:06 PM
 
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Other than electrical...check timing and gaskets...cracked intake gaskets have been known to cause misfires and backfires
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post #4 of 10 (permalink) Old 08-16-2006, 03:13 PM Thread Starter
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Anything to majorly worry about, or a good cheap find that's worth buying?
P.S. DLIT, love the Carlton dancing in your sig.
That's frickin' halarious!
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post #5 of 10 (permalink) Old 08-16-2006, 03:14 PM
 
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if the bike has been sitting for a while bad gas can also cause this..

just throwing out ideas... hope it helped
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post #6 of 10 (permalink) Old 08-16-2006, 03:15 PM
 
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oops one more thing new plugs are great but make sure that they are set to the propper gap...
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post #7 of 10 (permalink) Old 08-16-2006, 03:21 PM
 
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Quote:
Originally Posted by tatersalad
oops one more thing new plugs are great but make sure that they are set to the propper gap...
On this ... I've known people to crank down too hard on the plugs and flatten the spacing.
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post #8 of 10 (permalink) Old 08-16-2006, 03:24 PM Thread Starter
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So definately could be worth $1500/bo with not too much worry of it needing an engine rebuild?
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post #9 of 10 (permalink) Old 08-16-2006, 06:44 PM
 
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$1500 or BO could be a great price. Is the misfire at low, high or all rpm's? Ask if you can take the bike to a mechanic. If he says yes, bring it to a Honda dealer and get a compression check. If the compression is good in all cylinders, you can probably fix the "minor misfire". I'm having trouble with Honda's ignition system myself.
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post #10 of 10 (permalink) Old 08-17-2006, 07:21 AM
 
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Quote:
Originally Posted by No Worries
$1500 or BO could be a great price. Is the misfire at low, high or all rpm's? Ask if you can take the bike to a mechanic. If he says yes, bring it to a Honda dealer and get a compression check. If the compression is good in all cylinders, you can probably fix the "minor misfire". I'm having trouble with Honda's ignition system myself.
Replace it...I have discovered over the years that when you start having problems with an EI system...you will chase problems around constantly unless you replace it from the box through the wires...spend a little more now and not be frustrated later...
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