New Rider
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Joined: May 7, 2013 23:12:20 GMT -5
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new carb
by: eivad1 - May 7, 2013 23:17:31 GMT -5
Post by eivad1 on May 7, 2013 23:17:31 GMT -5
hi my name is dave and see u guys have moved, i want to get a new carb 1E40QMB but want to know if i have to adjust it or can i put it right in
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new carb
by: skuttadawg - May 7, 2013 23:31:25 GMT -5
Post by skuttadawg on May 7, 2013 23:31:25 GMT -5
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new carb
by: urbanmadness - May 7, 2013 23:32:26 GMT -5
Post by urbanmadness on May 7, 2013 23:32:26 GMT -5
so many things can affect a carb. I have pretty good luck with them running out of the box on stock motors, but I live at 32feet above sea level and that makes a huge difference. Depending on the bike, you may have to adjust the a/f mixture and you might even have to re-jet.
If you can get the float bowl off your old carb, it may be worth noting what jets you have or even puting them in the new carb if they can be salvaged and cleaned. Save the old carb for parts (might be worth cleaning it before storing it) You never know when you may need a screw, a float, needle valve or diaphragm.
To adjust the a/f mix, find the adjustment screw, get the scooter to idle (might have to hold the throttle open till she warms up a bit), adjust the idle screw so when the bike is on the center stand, the clutch is not engaged, but almost ready to engage and spin the rear wheel. Then adjust the a/f screw until you get the best and fastest idle, then back it off 1/8 turn. Then re-adjust idle speed to where the rear wheel doesn't spin and you are done.
These carbs are very simple. Once you tear one apart (which I recommend on your old carb so you learn it), you will see how they go together. i do recommend you get one of those foil roasting pans lined with a piece of white printer paper and use it when you are pulling your old carb apart. The paper will help you see the small parts, so you don't loose any of them.
The best advise I can give you... It's only nuts and bolts. Once you get into these scooters, they are brain dead simple to work on. And if you get stuck... come see us.
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New Rider
Currently Offline
Posts: 23
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Joined: May 7, 2013 23:12:20 GMT -5
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new carb
by: eivad1 - May 7, 2013 23:49:13 GMT -5
Post by eivad1 on May 7, 2013 23:49:13 GMT -5
well my stock carb is messed up, the person who had it before me drilled here n there on the jets so im up n the air what the jet size is, since the new carb is cheap i am going to buy a new one, yeah with what he did it wouldnt go over 25mph, and should be atleast 35-40
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new carb
by: skuttadawg - May 7, 2013 23:50:54 GMT -5
Post by skuttadawg on May 7, 2013 23:50:54 GMT -5
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new carb
by: urbanmadness - May 7, 2013 23:57:48 GMT -5
Post by urbanmadness on May 7, 2013 23:57:48 GMT -5
how old is the scooter? The reason I ask, is alot of time, shade tree guys (and not an uber mac daddy shade tree guy like me) will try bigger jets before looking at what might be really causing the problem. A leaky intake manifold for example will make em run lean and instead of trying to fix that manifold or even looking at the manifold or vacuum lines, they will drill the jets to compensate. Or it just might of needed a good cleaning.
The stock carb, out of the box should be in the ball park as far as getting it to run. From there you can adjust the a/f mixture and re-jet if needed. When you replace the carb, make sure the intake manifold isn't cracked and that you make sure the carb is seated all the way into the intake manifold so you don't get a vacuum leak. If the clamp is in bad shape, go to an autoparts store of you choice and get a regular worm screw type hose clamp to replace it with.. (take the old one with you).. They are cheap and it will save you headaches.
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new carb
by: urbanmadness - May 7, 2013 23:59:55 GMT -5
Post by urbanmadness on May 7, 2013 23:59:55 GMT -5
Allyoop is the best....  |
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New Rider
Currently Offline
Posts: 23
Likes: 0
Joined: May 7, 2013 23:12:20 GMT -5
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new carb
by: eivad1 - May 8, 2013 0:04:29 GMT -5
Post by eivad1 on May 8, 2013 0:04:29 GMT -5
i did just today put an exhaust on today, i have a chinese scooter a 2003 moskito thats bascially a zuma motor, do i measure the carb to get the right carb on there
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