QuestionHi Mark, I have a '92 CBR600F2 that is having running problems and it's giving me the fits. When I start her up I'll use the choke (usually) but wean her off it within 20-50+ seconds until I can use the throttle to keep her around 2-3k RPM to get her warmed up so she idles on her own...but more often then not, she dies after what I am starting to ca-razily suspect the culpret to be = getting warm to a certain point (?--almost like REVERSE vapor locking), within about 5-8 minutes she just stalls and dies and I can't get her started for awhile. I've checked all vacumme lines I could id, sealed up the airbox leaks well with some RTV Blue sealant, just to see what would happen = didn't improve current dilemma, but DID add notiicable power increase it felt like, crisper response, etc., petcock assembly...even taking apart to check the filter/petcock/o-ring seal making sure it was sealed correctly = a-ok, fuel lines and filters, air filters = main and little on bottom left of airbox...all a-ok it seems. The carbs were rebuilt about 4K+ miles ago just before I had bought her --- used of course, and she has an old Vance and Hines SS2R can on her rear...wondering if she possibly needs her carbs done again? Also, the 2 inside exhaust pipes (#2and 3 cylinders) which I had recoated with some 3K+ degree stovepaint is baking off, but not on the outside two, does this possibly indicate a coil problem, maybe one is going bad and the engine possibly flooding out to death...etc.? But if that were the case, wouldn't it die when I was riding her also? What about a stuck carb float? I checked the plugs, they for the most part seemed fine...going to order some new ones when I can, they're expensive, 12.00/each --- and special order for some reason---woah! Anyhow, when she dies like this, I'll just turn her off, go inside and wait about 15-20 minutes and then come back out and she'll bang right up and stay running...(almost like she flooded---or something opened up, ever so slowly allowing her to come back to life and stay alive), so I have absolutely no idea what is causing this, it's so odd, and I have never come across this issue with any of my previous 13 cycles = all makes and models and classes. I've tried experimenting with the engine kill switch off, holding throttle wide open and cranking her to see if she is flooding, but also to no avail...but have noticed that when I have tried this method that the engine load noise is much greatler than if I were to just crank her without the throttle...why is that? Becasue that to me screams flooding right there. I've tried all different combinations of using the choke when I first start her also, but to no avail because she's either going to start and continue to run and warming up, but usually not, and just sputters to death. She has 29K+ on her clock and I take care of her, oil, filters, etc., and ride her responsibly, but wondering if motor isn't giving out... = who knows exactly what all her previous owners did to her, rode her, etc.? So, it's almost like she's only running on two cylinders and almost 1/2 flooding out when she reaches a certain point after her initial staring. I'm really wondering about that coil possibility...? Is this a common problem to this bike because I have found a few other posts on the net regarding this very same thing happening to others F2's --- but no fixes, yet. She rides well and has good power to the ground still---when she runs. This problem is just annoying and I've done all the simple things in the HONDA MANUAL, so I thought I'd stop back by after the info. you gave me last year on stock suspension settings which was very helpful. So what do you think? What's this sound like? I'm pretty broke so I'm on the "do it myself list"...and what bites is this is my only form of transportation---and of course, 'therapy' :P in my life, so any thoughts or questions you may have for me will be appreciated. Thanks, Mark, hope you have a good weekend!
Christopher Michael Saintcoburn@aol.com
PS: when she gets running she runs like a Bat outta H.--- and I'm getting 225 MPG out of a tank of gas...which is right on par with what HONDA says should be...so she's still good to go ot seems.
AnswerHi Christopher,
If you're up to it, I have a task for you.
Describe the appearance of each spark plug. Indicate the cylinder each was removed from.
Check cylinder compression with warm engine and advise on results.
Check valve clearances and advise on results.
Reply and answer the above questions and we'll go from there. I'll research the net for common problems in the interim.
Respectfully,
Mark Shively
