No more vacuum fuel pump problems! GY6 Won’t start: FIX! [PROBLD PULSER UNIT] 

I want one where do I order

thank you for bring up this video, i have the exact issue and never knew the problem. my bike has about 6k miles & i kept getting oil changes ever 1k miles & i just didnt know what was up.

More knowledge from the guru of grom, the honcho of Honda and the master of mechanics!! Happy 🦃 day to you and yours!! Thank you for all the shared knowledge!!

Thx for ur hard work.. can’t wait for ur turbo set to hit the market… I told me wife I’m saving for a new car.. 😅

Very nice and useful video! Thanks for sharing!!! Greetings from Mayorca Spain

My fuel tank is above the carburetor. No Vac-op fuel pump for me. Thanks for the video. Educational. ❤

Yes these are all great new items I’m all for it! 👍🏼👍🏼 but for the ones who has the Mikuni fuel pump now they can blow on the gas tank to push the gas up to the carb to prime but who would want to keep doing that right so the easiest fix for this is installing a fuel transfer pump/manual pump on the fuel line between the pump and carb. You can buy the smallest one you can find so it’s easy to tuck away. Just another branch that people need to know if we’re about helping the community. More power to you guys Big Mike! 🍻

I love your videos and all the hard work it takes to make them. It's been so useful and pivotal for me. I'm riveted by your knowledge and your delivery style. With that said, I got a 150 Maddog a week ago, I have major plans...this is way down on the list but i was wondering if you could quickly describe what to do on an AC bike? I'd love a quick tip on how to install this on my maddog and the work around details for AC. Again, thank you for all your hard work, i make videos for living, i direct music videos for Sevendust and metal bands like that so i know the work that is needed for these, you are prolific!!! and aloha from Kauai!! you wouldnt believe the hoops jumped through to get a NEW maddog here, lolol. EDIT: I see you've answered this question below, it pays to read all the comments. The compliments still apply, Imma TRY and figure out what "tapping into the ignition wire" means, how to do it, then do THAT..:) Feel free to make a quick video on that since many of us do have AC to contend with! :)))

👍🏼🙌🏻🙌🏻glad they worked out for you Matt!

Fuel pumps are very reliable and rarely go bad.

Just ordered mine! I’ll make a video about it as well! 🙏🏽

SOLD! I'm gonna get one soon. My high rev GET runs the carb dry at WOT.... maybe speeding up the stock fuel pump pulse will provide the little bit extra fuel I need!

Good Job my dude!! Good Job!

Great info bro thanks.

That Ruckus is sick.

Thks four your excellent video I have a Peugeot v clic is start today spilling gasoline through the tank breather whitch reason thank you so much

Awesome!!!!!! you are a genius

You’re the best !

you should be proud! you did a cool thing!

Have one on hyosung Aquila gv250. Tank is above the carbs. I have done everything to this bike and I mean everything. Carbs and all. Still dies upon throttle but it starts and idles perfect. I have to spray the carbs to rev normal. I have a feeling it's this vac fuel pump. It's my first one I've ever seen.

Your video and explanation of operation is amazing. Thank u

nice! well done....

Nice product

Wao! 😲 Very nice product 🛵👍👍

So it's basically priming the carb, like a lawn mower, but on auto pilot.... pretty cool design my friend

Very cool.

Good solutions for motorcycle that use a vacum pump..vacum pump kind like sucks...this is really a good inovation for old bike.

Been following for years. Ever consider getting a Sur Ron and modding it? Feel like it’d be a great way to gain a huge following while helping the electric community as well with your knowledge and ingenuity. Just something to consider ✌️

I have a 2005 Yamaha Rhino 660 that has the identical problem. This item would work for this unit also, correct? Thank you so much, great video.

i had the same problem, fixed it with a primer bulb from a boat mounted under the seat been working perfect for a while. after it sets for a while just sit down give a squeeze or two then hit the starter and within a sec or two she's running. total cost..about 8 dollars.

That is cool👍👍

just ordered

Same problem with lawn tractors that use a very similar vacuum pump system so your fuel is going back to the gas tank in about two days time and you try to start it 2 days later you're cranking for quite a bit before it fires off again!

Sweet little gadget!

Great video! Alternatively you could put the electric pump prior to the vacuum pump as a booster and wire it to the ignition switch, So it would come on and pump fuel to the carb on starting and then the OEM vac pump would take over during normal operation,

New subscriber from philippines can vlog a full video how to build a simple and budget meal gy6.. THANK YOU😊😊😊

Hey, Rolling Wrench I have a 2003 Honda ruckus and someone cut the Fuel Pump Plug off and just left the brass connector without the plastic cover over it. Do you have a feul Pump Plug or what should I do? Thanks, man, you've been a great help.

I had this problems with vacuum pumps to supply fuel on my 2 twins carbys,,i fixed with a simple eletric pump whit a relay switch to the ignition 12 voltage ,,run when engine on an stops when you turn off the engine ,,easy,,

Can the vacuum help if you have a problem with the gravity fed carbs?

I appreciate you , I have a question that can I use a electric fuel pump without pulser

86 Craftsman Garden tractor with a vacuum pulse pump with gas tank above carb.

I been checking some of your contents and I love them all. I just have one question. 1p61QMK engine those that means only a 61 mm bore kit works? Or how high can I go. 170cc 61QMK ENGINE I want to make it faster and I’m also looking to purchase the reveno clutch kit

My Simplicity Champion zero-turn has the round black one. Mine was working fine until the vibration cracked the plastic off

I have an 86 ski doo citation 250cc 1 cylinder. Pull start, many pulls before starts. No battery, only ac on lights. Can i install this with an ac,dc bridge rectifier?

Whilst I think this is great upgrade it should be noted most of the problems associated with el cheapo vacuum pumps are because of the use of ethanol fuel. Whilst most, not all, GY6 style engines can tolerate E10 fuel it turns the diaphragm in the fuel pump into a wibbly wobbly jelly like curtain instead of a semi rigid membrane that can 'pop' back and forth and so pump properly. Mikuni and Keihin vacuum fuel pumps currently made in Japan have ethanol tolerant diaphragms however, because ethanol also jellifies the non-metallic components of the typical CV carburetor (float needle tip, main diaphragm, air cut valve diaphragm, bi-starter seat) they don't work properly either. I use E10 with no problems in my cars and my motorcycles which are fuel injected but not in my scooters.

When the pump is not activated, does it block the flow of fuel? What I’m wondering is if I can use this on a gravity, fed fuel tank. Those vacuum operated pet cocks have always been very unreliable for me. I would love to just put a manual petcock on, and then essentially use this pump to stop the flow. If you open the bike is off, and then let it flow when the bike is on.

Could you upgrade a gy6 engine to the max? Then proceed to put it on your custom stretched Honda Navi?

Come funzionano le pompe che hai detto che non vanno bene? Nel senso, si collega solo entrata benzina e uscita che va al carburatore?

The smaller gy6,(139qmb) carb has a mechanical acceleratior pump so normally in the winter I just twist the throttle a few times and it starts right up,the bigger carbs downfall is not having a mechanical acceleratior pump,it's ran on vacuum

If your carb bowl is full, then it'll start with no issue. Then the vacuum pump will have plenty of time to catch up. Another issue you're facing is the pump need to be pumping, not pulling. Mount it low, by the tank, and this is again a non issue. Also, try using a battery that isn't half dead.

ACDC sounds like lucus the prince of darkness. God bless

How about running a high-flow fuel pump directly into the carb with a low pressure (1-2 psi) check valve in reverse acting as a relief valve dumping back to tank and just let her pump to it´s hearts content.

Awesome! Still waiting on that EFI unit Matt!!

I've done everything you mentioned 😂

My Riding Lawn Mower has the Vacuum pump. The Tank is well above the engine and carburetor. Do you believe that the pump is actually necessary?

Ce una diversificazione quando il motore è ad bassi regimi o alti regimi?

Learning altot about gy6 engines from you. Was wondering if this will work with a tao tao racer 50. I believe it has a vacuum pump not quite sure, but having same issues. Have recently done an cc upgrade using pro build, from 49 cc to 80cc.

@Rolling Wrench you mentioned selling gy6 171 already to go. How much is that?

how would i pump fuel into a carburetor i drained when my push start is broken? i have an automatic choke carb and a kickstart.

Can o use this part in a Honda pressure washer GX 390? Please let me know. Thanks

What would have if I didn’t get that module and just had it wired in to ignition switch and just gave it the 2 psi the whole time. Running and idling , would it be ok. It would be just like a car

L’uscita del carburante varia in base ai giri del motore?

So I have a 1986 spree Honda and it needs a crankshaft we're wold I be able to get one?

Those (vacuum) pulse fuel pumps are generally ran to the *crankcase* on riding mowers, not the intake. Constant vacuum does not power them. It needs to be cycled from pressure to vacuum to pressure to vacuum. Vacuum pulls fuel into the pump, pressure pushes it to the carburetor, and the cycle continues.

These pulse pumps are actually very reliable and are widely used by experimental aircraft. It's not the pumps' fault that the fuel is low and needs to be pumped up to the carb. It's the pumps' job to keep the fuel flowing to the carb AFTER the engine starts, not get the fuel there to start with. To do that, use a primer bulb like outboard motors use. Also, the vacuum line should be as short as possible and made from stiff rubber hose, not long soft fuel line. If you use an electric pump, you must insure that the pump pressure doesn't exceed the rated pressure of the carburetor. Otherwise the pump will overdrive the carb float valve.

Bought one. Found out 2 wires on Maddog will turn off power when disconnected. The green and green/yellow stripe. I may have hooked up backwards. When turn on power running light came on but pulse motor did not? Did I fry it? Have purchased service time. Looking forward to figuring it out.

i wonder if this could be adapted to an outboard motor that uses a small vacuum pump ? 94 mercury 75 hp 3 cylinder.

I really believe you are trying to sale people on your products. I've never had problems with my equipment before. If it came with a vacuum pump then it was definitely should work.

Run the hose to the carburetor. The carburetor has a float it is an on and off switch for the gas.

will this work for an arctic cat 400 with a vacuum pump?

I have a 2009 Yamaha Rhino 450. Will this work with it? Thanks in advance Dan

Hey Matt I had a question about the reliability of a gy6 swap. If I go the gy6 route is that a motor that I am constantly gonna have to tinker with and fix things and all that just to keep it running or is it reasonably reliable as long as you keep up with routine maintenance and all. Also I just bought my first ruckus like 2 months ago. I have done a bunch of stuff to it already and I just wanted to say thank you because without you I would have zero clue on what to do with any of it. Everything I now know is from watching your videos

Will this work on a 2004 Yamaha Rhino 660? Thank you

i have a Kymco Granding 250cc scooter, its not been running since July or August last year, and i just start to run it again yesyerday and today... and the issue i have now is when i go uphill it feel like it going to stall or dosent have enough power or gas running, what could the problem be? is it a power pump issue or what? it use the round shape power pump like onr u show in this video

Awesomeness! Just ordered mine! Where do you recommend I mount the pulsar unit? Also will I ever need to play with the screw on it?

Ok so my 150cc icebear is shutting off as I ride it. Then won't start. It's like it just loses power, like it's not getting proper gas because I can feel it bucking a little before it goes down. Sometimes it has worked to blow through the gas tank to get fuel going again. I've replaced the carb the spark and numerous other parts. Any ideas? I need it for transportation and I'm broke.

Hey just wondering about the performance and whether this would work as a fuel 💉 pulse for a with a throttle less design if you incorporated a drive by wire ...sort of setup instead of your potentiometer the 3 wires from the electric throttle on an electric scooter .... controlled the pulse as you wrap the throttle ....to achieve this you would also have to use a stepper motor to actuate the throttle blade to matching the input of the pulse of the injector ... Drove by wire for a clean 👌cable free install ....

Also applies to some Chinese generators, and it's even more of a pain as you have to pull start the damn things 😅

I wonder the cost to the Uk post thanks.

Will this work on a stock Honda Metropolitan 2009?

Do you think that would work with a 2005 V Twin 750 Kawasaki ATV

figure a way to power this pump on my inverter generator. I got the same damn pulse fuel pump that takes forever to pump fuel up to the carb...this causes me to use the mouth trick each time and pressurize the tank to get fuel to carb.

I just watched the video how's the pulser unit know if it's over fueling are under fueling the engine is going to use more when under a loud

This sounds like it would work on my brute force 750 I’m interested in the fuel pump also but I didn’t see in the link

So I have a gy6 50cc ice bear mad dog with vacuum problems so the pump doesn’t work well if I get this will I not need vacuum anymore

Good morning sir I live in Jamaica hyryder Kawasaki 0811 can jet fuel pump apply to my bike also

Will it work with a Honda gx 390 motor?

Hi, first of all ... Cudos for developing your on electric pump controller... My question is: wouldn't you be able to control and avoid over heat with a cheap pwm module for a DC motor?

Wait my gas tank is above the carb but is a vacuum bc I sucked on the vacuum line and it pushed fuel out.

Dose it work on 2 strokes

I’d like to purchase

I'm searching far and wide to buy one of these GY6 scooters

Do you work on Atv motors or better question do you rebuild customer engines.

I have this issue, would work on my Garden Tractor?

Use crankcase vent hose instead of the intake port as your vacuum source

Just put a pump bulb from a boat fuel tank

I have a 24mm diaphragm type, if I use of these, am i getting a problem like overflowing since it is pumping continuosly?

How much pressure does it put out? Could you put on a the regular electric fuel pump that's for an automobile but with low pressure?

$233 ordered with pump and pulsar, no shipping. Got an old UTV project I'm tired of dealing with. New carb, filters, fuel lines, sparkplug and everything and she's still running like garbage. New ignition coil and this pump will save it. If not I'll light it on fire lol I'll try to remember to come back and let ya'll know how it comes out

Never had a problem with one that hasn’t failed mechanically.