I’ve bought many Chinese carbs mostly for snowblowers through Amazon and have had good and bad. I’d say it’s about 90% success rate for my application. Kudos to you on just making it work and for the informative video. Ive just been sending mine back to get another.
how to install one of these and still have access to the air furl high speed mixture screw for tuning WITHOUT having to take it off of loosen and rotate it? any ideas?
11:38 could the 3 smaller holes on the 2 bad carb bodies be drilled out to match the same size diameter holes of the 2 good carbs....Then get 2 new mushroom type pilot jets & test if they now all 4 run the same.
I have a new icebear champion 125. Could not get it to run right. About to give up and I decided to remove gas lines from carb. When I select petcock to on. I didn't get any gas flow. It only on reserve let gas flow. Bike runs good now that it gets good gas flow.
Maybe this is too basic for you, but I think it warrants being mentioned for noobies. The float height is pretty important and can be a big factor. To the people unfamiliar think of your jet as a straw and the higher or lower that fuel level is requires less or more vacuum to pull fuel up it.
Any idea where I can buy a better spacer (black plastic piece between intake and carb) ? Mine snapped in 2 and if I don’t use it I touch the engine cooling fins.
My Vader was running like garbage the other day and I discovered my black spacer was cracked causing a vacuum leak. I'll be on the hunt for a better spacer as well.
Make sure the choke is off. With the choke lever all the way down it will be off. Choke lever in the up position is on. If the idle is still high you may have a vacuum leak. This is assuming you've already tried adjusting the idle screw.
Update: We've been running two of the bikes a lot the last few days. Both seem to like the main jet drilled to .039" which would be about a #100 main jet. The #105 main jet was a little too big for both and a stock #95 main jet was too small. The $70 eBay exhaust I'm running on my bike still has the baffle in the silencer. We're using pod filters.
ok to be clear. Pretty sure I have the same jets from amazon. So which sizes did you drill(what was the engraved size)l? Also did you drill both or just main jet? And if both...did you drill the pilot with .039?
I'm having a bog issue with my boom Vader 125 aftermarket VM22. Starts perfect idle's great! Top end sounds amazing but quarter throttle it'll bog and want to die. Does anyone have a link to good pilot jets for the knockoff VM22 carbs? I have main jets but I definitely want to try new pilots
they aren't identical bikes. one has exhaust and the other one doesn't. are you positive the intake Inside Diameter is the same? Oh, and make sure the gas tank gas tank vent line isn't kinked.
The good running bike had a cat delete and modified stock muffler so it flowed much better than stock. The bad running bike had the typical $70 exhaust system from eBay so it flowed better than stock as well. We knew we had a carb issue when we swapped the carbs because the bad running bike ran good and the good running bike ran bad. At that point we could eliminate other potential issues and focus on the carbs. As you can see in the video the carb that didn't work well on either bike had several differences compared to the carb that worked well on both bikes. Once we made the changes to the bad carb so it more closely matched the good carb, our problem was solved. We have several miles on these bikes now both at the track and around town and they are running great. Since this video we've tuned a few other carbs for Vader's and we're finding the same thing, not all of the Chinese VM22's are the same. We appreciate your input. These bikes have been fun to tinker with and even more fun to ride. If you're near Santa Barbara you should come ride with us, our Vader group is growing!
Mikuni flat slide 26or28carb it is the best way to go the other carbs are china junk and everyone has this same problem with these carbs you can try buy all new jets but I no even if I does work it not the greatest and most people get a new one. 👍✌️👌💯
I have my China carb working good but I will definitely give a genuine Mikuni flat slide a try. What are you guys using for jetting in the flat slide carb?
Off the top of my head and if I remember right it was a 120 main or 125 I'd have to look again to be positive im actually in the middle of converting to fuel injection on my 190cc and put the mikuni carb on the boom Vader 125 engine was thinking of building a mini chopper 125 venom. I had the same problem that how I ended up with what I have😂 👍✌️👌💯
We are not sure how to get the VM22 that works best. There are soooo many sellers and in the short time since posting this video we've seen other versions of the VM22 brought to us by customers. So far they are all working great when brought to these specs we shared in the video.
@@agkracing140 The one I bought is identical to the one on the left, that works great. I thought the pilot was too big because it was bogging at 1/4 throttle but just past that it was fine. I had the needle in the middle and a 105 main though. After watching your video I will change to a 100 main and raise the needle to second from last slot. See how that works. I am running open pipe, but I'm going to put a Db killer in for more torque. Thanks for the information, it helped a lot! I almost gave up for a more expensive Mikuni original.
I had a similar issue, turns out it was a rubber grommet inside the AF screw that was missing that threw off the mixture.
Having this issue right now awesome information
I’ve bought many Chinese carbs mostly for snowblowers through Amazon and have had good and bad. I’d say it’s about 90% success rate for my application. Kudos to you on just making it work and for the informative video. Ive just been sending mine back to get another.
how to install one of these and still have access to the air furl high speed mixture screw for tuning WITHOUT having to take it off of loosen and rotate it? any ideas?
11:38 could the 3 smaller holes on the 2 bad carb bodies be drilled out to match the same size diameter holes of the 2 good carbs....Then get 2 new mushroom type pilot jets & test if they now all 4 run the same.
Yes, it is possible to drill those out to match.
He is right they all work different
I have a new icebear champion 125. Could not get it to run right. About to give up and I decided to remove gas lines from carb. When I select petcock to on. I didn't get any gas flow. It only on reserve let gas flow. Bike runs good now that it gets good gas flow.
LOL China is always full of surprises! Reserve = On
what jet are you using?
Not sure, it is the stock jet. I’ve moved up to Suzuki dr650 now
Maybe this is too basic for you, but I think it warrants being mentioned for noobies. The float height is pretty important and can be a big factor. To the people unfamiliar think of your jet as a straw and the higher or lower that fuel level is requires less or more vacuum to pull fuel up it.
Any idea where I can buy a better spacer (black plastic piece between intake and carb) ? Mine snapped in 2 and if I don’t use it I touch the engine cooling fins.
My Vader was running like garbage the other day and I discovered my black spacer was cracked causing a vacuum leak. I'll be on the hunt for a better spacer as well.
@@agkracing140 keep me posted man. I found a plastic kit for $8-9 on Amazon but I bet the same thing will happen again. I was going crazy
try loosening the float bowl drain screw backed off a bit so that it isn't seated all the way. Open it, then turn it just until the drip stops.
I have a question so yesterday I upgraded my carburetor to a new one and now it doesn’t stop reving high
Make sure the choke is off. With the choke lever all the way down it will be off. Choke lever in the up position is on. If the idle is still high you may have a vacuum leak. This is assuming you've already tried adjusting the idle screw.
Get the real mikuni carb
Could also be your putting the piston slide in backwards. It has to seat all the way down the cylinder.
Incorrect float level can make run Rick or lean
Update: We've been running two of the bikes a lot the last few days. Both seem to like the main jet drilled to .039" which would be about a #100 main jet. The #105 main jet was a little too big for both and a stock #95 main jet was too small. The $70 eBay exhaust I'm running on my bike still has the baffle in the silencer. We're using pod filters.
ok to be clear. Pretty sure I have the same jets from amazon. So which sizes did you drill(what was the engraved size)l? Also did you drill both or just main jet? And if both...did you drill the pilot with .039?
I'm having a bog issue with my boom Vader 125 aftermarket VM22. Starts perfect idle's great! Top end sounds amazing but quarter throttle it'll bog and want to die. Does anyone have a link to good pilot jets for the knockoff VM22 carbs? I have main jets but I definitely want to try new pilots
affordablegokarts.com/collections/air-filters-carburetors-160-200/products/pilot-jet-mikuni
My bike is brand new and smoking do you know why?
Email us at tech@affordablegokarts.com and we'll see if we can help you.
did you pour oil onto the exhaust pipe
@@HNS-007 nope figured it out there was a hose unplugged that went to the bottom of the engine.
they aren't identical bikes. one has exhaust and the other one doesn't.
are you positive the intake Inside Diameter is the same? Oh, and make sure the gas tank gas tank vent line isn't kinked.
The good running bike had a cat delete and modified stock muffler so it flowed much better than stock. The bad running bike had the typical $70 exhaust system from eBay so it flowed better than stock as well. We knew we had a carb issue when we swapped the carbs because the bad running bike ran good and the good running bike ran bad. At that point we could eliminate other potential issues and focus on the carbs. As you can see in the video the carb that didn't work well on either bike had several differences compared to the carb that worked well on both bikes. Once we made the changes to the bad carb so it more closely matched the good carb, our problem was solved. We have several miles on these bikes now both at the track and around town and they are running great. Since this video we've tuned a few other carbs for Vader's and we're finding the same thing, not all of the Chinese VM22's are the same. We appreciate your input. These bikes have been fun to tinker with and even more fun to ride. If you're near Santa Barbara you should come ride with us, our Vader group is growing!
Huh. I may have gotten my hands on a dud then. The bike runs ok, but seems super rich at idle regardless of what I do with the fuel screw.
Adjust the needle down
Or just get a real Mikuni lmao
Mikuni is the best carb only if u can get it to work i just cant get it to work always bogs i have tried everything
Well you haven't tried everything if it's not working lol
So much for best carb nobody’s works lol
Lol ofcourse I got the junk one 🤦♂️
Like da red yellow cbr ? Lol
Mikuni flat slide 26or28carb it is the best way to go the other carbs are china junk and everyone has this same problem with these carbs you can try buy all new jets but I no even if I does work it not the greatest and most people get a new one. 👍✌️👌💯
I have my China carb working good but I will definitely give a genuine Mikuni flat slide a try. What are you guys using for jetting in the flat slide carb?
Off the top of my head and if I remember right it was a 120 main or 125 I'd have to look again to be positive im actually in the middle of converting to fuel injection on my 190cc and put the mikuni carb on the boom Vader 125 engine was thinking of building a mini chopper 125 venom. I had the same problem that how I ended up with what I have😂 👍✌️👌💯
Great video, I enjoyed the troubleshooting. I have a Vader with a vm22 and it worked great right out of the box. (60mph) I guess it was just luck.
That's crazy yours worked right out of the box. Loving these Vader's though, even with the work that goes into them.
Great video. Love getting cheap carbs to work.
It's definitely a great feeling of satisfaction once we get the cheap carbs to work well on our cheap clone projects.
so, do you have any suggestion how to buy the 'right' vm22?
We are not sure how to get the VM22 that works best. There are soooo many sellers and in the short time since posting this video we've seen other versions of the VM22 brought to us by customers. So far they are all working great when brought to these specs we shared in the video.
@@agkracing140 The one I bought is identical to the one on the left, that works great. I thought the pilot was too big because it was bogging at 1/4 throttle but just past that it was fine. I had the needle in the middle and a 105 main though. After watching your video I will change to a 100 main and raise the needle to second from last slot. See how that works. I am running open pipe, but I'm going to put a Db killer in for more torque. Thanks for the information, it helped a lot! I almost gave up for a more expensive Mikuni original.