03-03-2021, 10:18 PM | #1 |
Join Date: Mar 2021
Posts: 12
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bikes dies
delete if not allowed in this thread but i have a 2020 vader boom 125cc bike and i installed a new carburetor and whenever i give slow throttle it revs but when i give a quick throttle it died right away sounding lie its getting too much air. i took off the air filter and i can see its wet inside the carb and that the pin is soaked. any suggestions?
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03-04-2021, 12:32 AM | #2 |
Join Date: May 2020
Location: California
Posts: 169
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Is the carb a vm22 knock off?
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2020 Boom Vader Gen 2 2019 CSC TT250 2021 Kayo Fox 70 |
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03-04-2021, 03:03 PM | #3 |
Join Date: Mar 2021
Posts: 12
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I believe it is
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03-04-2021, 03:45 PM | #4 |
Join Date: Mar 2021
Posts: 12
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03-04-2021, 04:22 PM | #5 |
Join Date: Oct 2020
Location: Flower Mound Texas
Posts: 904
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Does it run ok with the old carb?
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2021 Tao Tbr7 - "Lucille" Mods so far- Brozz swingarm, 21" front rim (Bridgestone Tw302 rear/Dunlop D606 front tires), Digital gauge cluster, pz30b pumper carb, after market hand guards, aftermarket brake and clutch levers, round fold away mirrors, Fly handlebars shortened slightly, 13t front sprocket 2009 Q-link Legacy 250 1982 Suzuki GS1100ES - "Jolene" |
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03-04-2021, 05:45 PM | #6 |
Join Date: Mar 2021
Posts: 12
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Yeah, maybe its the spark plug?
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03-04-2021, 07:09 PM | #7 |
Join Date: May 2020
Location: California
Posts: 169
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Make sure float height is set right. With float bowl off carb flip it upside down. Float should sit fairly level. If not bend little tab till it does. Set the idle air/fuel mixture to 1.5 turns out(screw on bottom of carb, will need to remove from bike to do). Install a size 100 jet. Put needle clip all the way rich(towards pointy end). Make sure choke is off( lever in down position)That should get you close to decent running.
Keep in mind not all vm22 clones are the same. You might have a bunk one.
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2020 Boom Vader Gen 2 2019 CSC TT250 2021 Kayo Fox 70 |
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03-04-2021, 07:29 PM | #8 |
Join Date: Mar 2021
Posts: 12
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First time I'm messing with a carburetor, going to have to talk stupid í ½í¸‚í ½í¸‚
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03-04-2021, 11:43 PM | #9 |
Join Date: May 2020
Location: California
Posts: 169
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Typically these carbs run lean out of the box unless you live at high altitude. Did you order a jet kit with the carb?
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2020 Boom Vader Gen 2 2019 CSC TT250 2021 Kayo Fox 70 |
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03-04-2021, 11:54 PM | #10 |
Join Date: May 2020
Location: California
Posts: 169
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Attached pic is where the idle air/fuel screw adjustment is.
Screw that in until it stops but apply light force when you do it. Just until it bottoms out. Then back the screw out and count the rotations. You want to back it out 1.5 turns. This should get you pretty close and seems to work for a lot of people.
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2020 Boom Vader Gen 2 2019 CSC TT250 2021 Kayo Fox 70 |
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03-05-2021, 04:58 AM | #11 |
Join Date: Mar 2021
Posts: 12
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Oooh okay, ill give it a try after work and see if it makes a difference. If not then the hell with it ill install the original carb and airbox back on.
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03-05-2021, 05:45 AM | #12 |
Join Date: Oct 2020
Location: Flower Mound Texas
Posts: 904
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Wait, are you not running an airbox now? Then you're probably way lean on your main jet and possibly on your needle position.
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2021 Tao Tbr7 - "Lucille" Mods so far- Brozz swingarm, 21" front rim (Bridgestone Tw302 rear/Dunlop D606 front tires), Digital gauge cluster, pz30b pumper carb, after market hand guards, aftermarket brake and clutch levers, round fold away mirrors, Fly handlebars shortened slightly, 13t front sprocket 2009 Q-link Legacy 250 1982 Suzuki GS1100ES - "Jolene" |
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03-05-2021, 01:49 PM | #13 |
Join Date: Mar 2021
Posts: 12
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I'm running the air filter they sent with the carb
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03-05-2021, 03:35 PM | #14 |
Join Date: May 2020
Location: California
Posts: 169
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You are going to need a jet kit to get it perfect. If you max out the needle clip position to run rich as possible it should make it rideable at least. Do you know how to adjust the needle?
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2020 Boom Vader Gen 2 2019 CSC TT250 2021 Kayo Fox 70 |
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03-05-2021, 04:23 PM | #15 |
Join Date: Mar 2021
Posts: 12
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The screw on the side right? It'll adjust the needle inside for the throttle?
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