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Post by flash2002 on Nov 20, 2018 12:21:44 GMT -5
Hi, I bought a used 2003 CPI 50cc scooter a few weeks ago and started to do some work on it. One thing I'm not sure of, is the carburetor. I don't normally have problems with carbs but this one got me scratching my head. From what I see it looks like 50 Malossi 17.5 carb now I know that there is one oil inlet, one gas inlet, but there is what looks like two vacuum fittings. I'm sure one goes to the gas valve but where does the other one go to. The two fittings are on top and beside each other. This scooter was in bad shape and had broken and missing parts and there was no hoses on the carb but is starting to look like new. Thanks
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Post by pinkscoot on Nov 20, 2018 12:59:30 GMT -5
Its probably an extra intake for emissions or something. It should be capped so that the scooter runs right.
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Post by gsx600racer on Nov 20, 2018 15:34:57 GMT -5
I pic of the carb would be helpful.
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Post by flash2002 on Nov 21, 2018 11:42:35 GMT -5
This is a picture of the carburetor. On the right there are 3 fittings, one I know is the oil the other 2 I guess one is for the gas valve but the other not sure. On top it looks like another vacuum fitting and on the left is the gas fitting.  |
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Post by 190mech on Nov 21, 2018 14:57:03 GMT -5
The aluminum one closest to the air intake should a float bowl vent,a small hose is usually attached to it to direct any overflow away from hot parts..
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Post by gsx600racer on Nov 21, 2018 15:04:13 GMT -5
The aluminum one closest to the air intake should a float bowl vent,a small hose is usually attached to it to direct any overflow away from hot parts..  |
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Post by aeroxbud on Nov 21, 2018 15:57:09 GMT -5
It looks like a water heater circuit. You can check by blowing air into one. The air should come out the other. Just blank them off if you don't need them.
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Post by diynuke on Nov 21, 2018 17:56:10 GMT -5
It looks like a water heater circuit. You can check by blowing air into one. The air should come out the other. Just blank them off if you don't need them. water heater in a carb? why would they do that? to defrost condensation? gasoline doesn't freeze up and if it would the engine wouldn't run anyway without gasoline to heat up the gasoline. |
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Post by gsx600racer on Nov 21, 2018 18:14:27 GMT -5
It looks like a water heater circuit. You can check by blowing air into one. The air should come out the other. Just blank them off if you don't need them. water heater in a carb? why would they do that? to defrost condensation? gasoline doesn't freeze up and if it would the engine wouldn't run anyway without gasoline to heat up the gasoline. Its called carburetor icing. www.faasafety.gov/gslac/alc/course_content_popup.aspx?cID=33&sID=150 |
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Post by flash2002 on Nov 21, 2018 18:23:55 GMT -5
gsx600racer, the place where you are showing the vent, there are 2 vents. You don't see the other one because it's under the top one. That is what is confusing me, why 2 vents.
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Post by 190mech on Nov 21, 2018 18:38:09 GMT -5
Shoot us another pic,our x ray vision is failing with age!!  |
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Post by gsx600racer on Nov 21, 2018 18:38:25 GMT -5
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Post by aeroxbud on Nov 21, 2018 18:42:46 GMT -5
gsx600racer, the place where you are showing the vent, there are 2 vents. You don't see the other one because it's under the top one. That is what is confusing me, why 2 vents. So the water can go in one side, then out the other. A lot of water cooled bikes have it. I have these pipes on both the jog, and Aerox. My 17.5mm aftermarket carb on the slider has them. It's air cooled so I just linked the two pipes together. |
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Post by flash2002 on Nov 21, 2018 18:46:46 GMT -5
 the picture is blurry but you can see the second fitting. |
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Post by flash2002 on Nov 21, 2018 20:56:43 GMT -5
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