Is it a carb issue and how to fix it? - Page 4 - CBR Forum - Enthusiast forums for Honda CBR Owners


CBR 1000F "Hurricane" 1987-1996 CBR 1000F

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  #31  
Old 05-16-2018, 05:35 AM
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On the 600F2, the floats are not adjustable...if there's a problem, they get replaced. Is that not the case with the 1000F?
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  #32  
Old 05-16-2018, 11:46 AM
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No, I don't think that's the case for the CBR1000FM as there's one of those metal tabs that sits onto the needle which can be slightly bent up/down which makes the float height adjustable - I think.
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  #33  
Old 05-18-2018, 01:58 AM
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For those of you who have been following/contributing to this thread (thanks) - and for everyone else - I've now tested my CBR1000FM out on the road a couple of times. It runs. In fact, if I roll open the throttle relatively slowly and close it equally slowly it runs very well. Really pleased with that, but, if I try to accelerate a bit harder or snap the throttle closed, sometimes (but not always) there's a significant hesitation followed by a backfire. In the past few days I took the carbs off and cleaned them (WITH THE EXCEPTION OF TWO OF THE PLUNGERS 'cos I simply couldn't undo the tops to access the diaphragms and withdraw the plungers). My question now is whether the current symptoms could be explained by my "incomplete carb clean". Could sticky plungers (for example) or any other carb component cause these symptoms? I know there are a few threads about similar problems on the forum but this is now a quite specific situation. Also, I'm conscious there are a few screws that could make it very difficult to get them off again (hence my original partial clean) so I'm looking for a little "guidance" before diving into something that could create a bigger problem rather than solve an intermittent hesitation I could probably live with if forced into it. If I do open up the carbs again, there's the unresolved issue of what is the correct setting for the float height - anyone have an answer to that too, please?
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  #34  
Old 05-18-2018, 02:31 AM
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Hi ,float height should be 9.5mm, slow jet 35, and main jet 120 , sizes changed on the 1992 bike
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  #35  
Old 05-18-2018, 03:40 AM
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Caberet - thanks very much for that info. I'm right the float height is taken simply by measuring it from the "lip" of the float bowl to the high point of the float? And just to check we are talking about a CBR1000FM. Thanks again.
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  #36  
Old 05-18-2018, 05:17 AM
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Yes thats right, info straight from Workshop manual , and crossed referenced with Autodata Technical Manual
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  #37  
Old 05-18-2018, 08:14 AM
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CaBeRet - thanks for the confirmation. Much appreciated.
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