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therabbit -> How To: Clean your carbs (5/31/2007 10:09:24 PM)
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How to carb carburetor cleaning clean
Did a search and didn't see anything about how to clean your carbs, even though it's pretty easy to do some people think it's a fairly daunting task, so I decided I'd snap a bunch of pictures while I did mine and make a quick write-up. Having said that, don't try this if you're stupid or mechanically challenged, you can break expensive things and cause a lot more damage then good. However, if you know the difference between a screwdriver and a socket wrench you probably have enough mechanical know-how to do this.
This was all done on a 2000 CBR 600F4, it will be different on other bikes, but very similar. The only tools needed (except for the tools to get to your carbs) are a phillips screwdriver, 4mm and 3mm allen wrenches, and some spray on carburetor cleaner.
Start by removing your carbs. You can do this with the carbs in, but it's a lot easier and safer with them out. Basically: Remove gas tank, remove air-box, unplug fuel lines and vacuum lines, remove throttle cable, remove carbs. (If this is your first time doing this expect this to take at least 2 hours, those band clamps are a pain the first time around)
Now you have your carbs removed:
[image]http://img232.imageshack.us/img232/7767/carbsoutmr2.jpg[/image]
In case you're wondering this little screw here is what you're looking for to do carb synchs (there's 3 of them 1&2, 3&4, and the 1,2&3,4 balancer):
[image]http://img232.imageshack.us/img232/7559/adjustscrewrh0.jpg[/image]
First step is remove your float bowls.
Remove these little bolts (4mm allen) there's 3 per bowl:
[image]http://img293.imageshack.us/img293/5367/bowlboltsgq0.jpg[/image]
Keep everything ordered (cylinder 1,2,3,4). Once you have the bowl off, clean it out with carb cleaner. It should look like this clean:
[image]http://img293.imageshack.us/img293/4149/cleanbowlvd4.jpg[/image]
Next, very carefully slide out the retaining pin on the float, I used to pocket knife to get it started then grab it with your fingers (not pliers) and pull it out:
[image]http://img525.imageshack.us/img525/4764/bowlpinbs5.jpg[/image]
Once the pin is out the float should be resting on the float valve, very carefully lift out the float and floatvalve:
[image]http://img179.imageshack.us/img179/8328/floatandvalveiv9.jpg[/image]
Clean off the float, the valve, and the interior of the bowl until they sparkle like new.
Reassemble the float chamber the way you took it apart, put the float valve into the carburetor and drop the float onto the neck of it (Sorry for the out of focus picture):
[image]http://img232.imageshack.us/img232/2449/floatassemblywk1.jpg[/image]
Gently lift the float up to align the pin and slide it in:
[image]http://img232.imageshack.us/img232/2746/floatpinmf1.jpg[/image]
Put the bowl back on and tighten the allen bolts down (make sure the gasket is on there).
Alright, on to the opposite side of the carburetor to the vacuum chamber!
Slowly remove the 3 allen heads holding it on (3mm) (sorry no picture). Do it slowly because it is spring loaded.
When you take off the cover grab the spring before it shoots off. Once again set things aside by cylinder.
GENTLY grab the hard plastic of the diaphragm and slowly and carefully slide it out:
[image]http://img232.imageshack.us/img232/863/diaphragm1in5.jpg[/image]
The needle in there is delicate, do not grab it by the needle, set it down on the needle, bend the needle... etc.
[image]http://img525.imageshack.us/img525/641/diaphragm2fh0.jpg[/image]
Clean out the inside of the vacuum chamber with carb cleaner, clean off the needle, and diaphragm, as well as the vacuum chamber cover
[image]http://img180.imageshack.us/img180/3849/vacchamberrb3.jpg[/image]
Reassemble things in the reverse order. Very Very Very Very car
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