CBR 900RR 1993 - 1999 Honda CBR 900RR

93 900rr running problems

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Old Dec 4, 2008 | 10:21 PM
  #21  
stynkmonkey's Avatar
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From: Leander Tx. USA
Default RE: 93 900rr running problems

I'm right off Crystal Falls too. Small world.
 
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Old Dec 5, 2008 | 08:25 PM
  #22  
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Default RE: 93 900rr running problems

lol thats crazy
 
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Old Dec 7, 2008 | 08:01 PM
  #23  
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Default RE: 93 900rr running problems

so back on topic i have now changed out my carbs for ones off a running 900rr and still nothing i checked the coils and they are getting spark but it looks weak very very tiny and yello orange in color a strong spark should be blue or white right? and every 30 seconds or so it back fires out the pipe the reg/rec wouldnt have any thing to do with this would it
 
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Old Dec 8, 2008 | 07:11 PM
  #24  
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Default RE: 93 900rr running problems

Ok, how exactly did you clean your carbs? If you didn't soak them for at least a day in solvent or have them ultrasonic cleaned then they are not cleaned, and you havn't ruled them out by any stretch of the imagination. Therefore, to even consider spark or anything else at this point is skipping a step. If you have not seperated the carsb from one another, removed every ounce of plastic and rubber from them, and done what i've outlined above, and in my first post, then you might as well pull them off again and just start over. This is what I meant when I talked about going through stuff with a fine tooth comb. If you can't say with 100% certainty that your carbs are as clean as the day they were mounted on your bike at the Honda factory then you havn't ruled them out or gotten any closer to diagnosing your problem. Your carbs were left to sit, full of fuel, for god knows how long, and it is for certain that ports and vent tubes are clogged or partially restricted. This is the only advice I can offer you, spark and electrical issues are a bitch and you shouldn't even look at them until you can garantee yourself that you've ruled out a fuel issue. Swapping carbs from another running bike isn'ta viable way to diagnose an issue. Who can garantee the carbs were any better than yours? Just cause a bike runs doesn't mean that its running right. If you swapped carbs and things are exactly the same then maybe you've got something, but from what your saying you didn't check the GPH flow on your fuel pump against the factory spec, and your unable to really say that you've ruled out any one thing. Not trying to be hard on you dude but there is a right way and a wrong way to do this, and your only going to get frustrated if you don't really take your time and rule every little step completely out before moving onto the next one.
 
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Old Dec 26, 2008 | 10:57 PM
  #25  
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Default RE: 93 900rr running problems

ok so my carbs are perfect now (you could eat off them) i was getting a weak spark so i changed out the coils much better now.
i cleaned and sanded the spark plug set the gap to .035 and bam it started after a min of trying to start it and it idled for a while about 6or 8 times of the fan coming on during that time after about 3or 4 min the headers just out of the head were glowing a dull orange then it stopped and idled for another 10 min or so then it started poping out of the intake manifold (backfiring) then slowly flooded out them wouldnt start (fowled out plugs)

any ideas
 
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Old Jan 18, 2009 | 09:10 PM
  #26  
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Default RE: 93 900rr running problems

still no ideas ???
i did a compression check today and the results were as follows
#1 175 #2 171 #3 175 #4 171
those numbers seem ok to me

 
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Old Apr 25, 2010 | 03:32 PM
  #27  
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Did you by chance ever figure anything out on this? I'm having the EXACT same problem on my 99. I posted about it but haven't heard anything back yet. I also noticed my spark seemed weak and orange. Just hoping you had found the fix.

Thanks
Ben
 
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