Carburetor Cleaning
#1
07-25-2009, 07:50 AM
Carburetor Cleaning
Hey y'all (that's a southern expression). For those of you that have cleaned your carburetors, I was wondering if you could tell me how big the hole is that goes through the "Slow Jet"? The main jet when I cleaned them is fairly large that you can readily see through when it's clean. But for the slow jet, it's all I can do to get light to show through them. If any of you are familiar with what we call a "twistie tie" on a loaf of bread that's usually white or black and has a paper coating on it. Well inside it is a wire that's pretty stiff. I peeled the paper back and used it to clean the inside of that jet. The wire is .015" in diameter. It was all I could do to get it to go through it. I wanted to know what your experience was with cleaning them.
#3
08-01-2009, 06:48 PM
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Posts: n/a
Actually 50 now 
... I don't think everyone's ignoring your question ...
Like prolly most here , I have never bothered to look for the actual size or measure them
The slow jets are very very small , so yer , seeing through them can be a bit hard ...
I will try to hunt the size down for you though ...
These are the sizes ....
I recon these are the sizes in Thousandth's of an inch ... but I will do some more searching to verify this ...
JET, SLOW (#40) for all US models
JET, MAIN (#122)for all other US models .... Californian models only (#120)
JET, SLOW AIR (#115)
and BTW ... I personally would refrain from trying to stick hard wire through them ...
It is very easy to open those hole up as the brass will scrape away very easily !!
Jet measuring and servicing tools are not that expensive ......or be very careful not to try to jam a larger piece of wire in the holes ..
(for cleaning , smaller wire than the hole, is the go and be gentle)
... I don't think everyone's ignoring your question ...Like prolly most here , I have never bothered to look for the actual size or measure them
The slow jets are very very small , so yer , seeing through them can be a bit hard ...
I will try to hunt the size down for you though ...
These are the sizes ....
I recon these are the sizes in Thousandth's of an inch ... but I will do some more searching to verify this ...
JET, SLOW (#40) for all US models
JET, MAIN (#122)for all other US models .... Californian models only (#120)
JET, SLOW AIR (#115)
and BTW ... I personally would refrain from trying to stick hard wire through them ...
It is very easy to open those hole up as the brass will scrape away very easily !!
Jet measuring and servicing tools are not that expensive ......or be very careful not to try to jam a larger piece of wire in the holes ..
(for cleaning , smaller wire than the hole, is the go and be gentle)
Last edited by CBRclassic; 08-01-2009 at 07:20 PM.
#4
08-01-2009, 08:33 PM
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I agree with Classic, never stick wire through jets. If carb cleaner can spray through the jet, it's clear. Anyway, the main and slow jets never clog unless the bike sits for a long time with gas leaking into the carbs. The 93 and later CBR's use a weird method of setting the floats. I would do the floats first, then take the tops off the carbs and clean the air jets, piston, and walls.
#5
08-01-2009, 08:56 PM
Thanks for the responses. I'm not trying to actually measure them, just trying to get an idea of what kind of expectations I should have. I've cleaned these carbs a couple of years ago, as well as a few times on our F3's. I've neglected the 1000F and left fuel in the tank and carbs (I know, you don't have to say it). Well,needless to say they were pretty gummy and the gas stank to high heaven. I was really trying to get a feeling from what others experiences have been on cleaning them.
Well, they're all clean an back on the bike. Now I've got to fix a pesky leak in the end of the radiator. I noticed that spraying onto the top of the carbs after I got it running. My fault for not riding her more
.
Well, they're all clean an back on the bike. Now I've got to fix a pesky leak in the end of the radiator. I noticed that spraying onto the top of the carbs after I got it running. My fault for not riding her more
.
#8
08-02-2009, 11:36 AM
#9
08-02-2009, 12:57 PM
I use carb cleaner and jam that little red tube they give you up against the hole and take a bath.
#10
08-02-2009, 01:05 PM
