How To Make your Hp Carburetor Run Better than stock!

Hey guys welcome back in today's video we will be discussing the issues with the Hp carb and how to solve them. Many people give up on them to quick but with a little tuning this is a blot on part that makes a huge difference on a relatively stock motor.
Also this carb is only 20$ on amazon and it can be at your door in two days.
So as you can tell I highly recommend this carb and my opinion on them a few months back was way different than it is now!
If you enjoyed the video it would be awesome if you could comment like and subscribe
Thank you all for watching!

[@user-xx5db5lk1e]

Dude you run tight mann thanks, about to run 100cc ported 11 , 36 mag this is awesome

[@soggyridesmotorizedbicycle6258]

Man bro, you have excellent coordination between the camera, your hands, and the part of the bike that you are talking about. I enjoy watching you talk with your hands.👍🫡😎

[@keeganhache6667]

Yup lol I do talk with my hands a lot but that shows the viewer that I am engaged and not just sitting behind the camera talking I’m actually trying to explain a concept. Thanks again for the support

[@buddahmayne9273]

Just intalled the Hp carb thanks for the video

[@jasonrickus4080]

Great stuff. Just finished my first build. I had it running right after build then the engine siezed up. Piece of metal from the factory. I replaced the piston rings, put hp carb, brass head gasket and hp cdi and magneto. Took me another few weeks to figure out my woodruff key was missing from the magnet. Once I installed it runs great

[@boydjensen3161]

Really nice presentation, Keegan, I learned a lot, thanks. I have the courage to try mine, now 😁

[@keeganhache6667]

Cool man glad I could help out and yeah like I said before I gave up on mine but then bought another and started from the beginning. Because my other carb got mixed with a bunch of parts from NT carbs

[@scottcastle9646]

Great description appreciate the help!

[@keeganhache6667]

No problem

[@soggyridesmotorizedbicycle6258]

I'm glad to see the progress on your trail bike bro. I agree on the performance upgrade. I tried it on one of my bikes and it was noticable how much faster and smoother that bike became.👍👍👍

[@keeganhache6667]

Thanks bro and yes the carb may not pull any harder than a NT but it sure does ride way smoother and isn’t always 4 stroking 24/7

[@BuildBreakFix]

Arg! Haven't seen you in while! ✌😉

[@_christienn._]

Hey, Loved the vid, I have a few questions. How did you hook the cable onto the carb, and how is cold starts. Because with my stock bofang carb, It will never idle on full choke so I gotta play around with it, and on this carb, it seems to either be full choke, or no choke. Is there a way to eliminate the choke lock? Thanks.

[@tonytaylor5087]

Love the idea of getting rid of the cable tube. It was definitely a challenge making that work.

[@keeganhache6667]

Yeah I did that since day one because I knew the stock cable wasn’t gonna be long enough for it to work properly Thanks for watching!

[@Bumblerocco]

can i still use the HP carb for my stock china doll engine? what size jet should i use for it to work on my stock engine.great video btw!

[@Matthew-wj8cm]

I'm glad you like this carb. I'm thinking about getting one of these just for kicks. I wanted to try my old NT on but sadly I lost the needle and the top cap. Definetly an option.

[@keeganhache6667]

What carb are you running at the moment?

[@Matthew-wj8cm]

@@keeganhache6667 BoFeng. I've been having these overrevving issues lately. It's not a poorly venting tank and it's not an air leak. The idle is very slow and it dies or it stays revved high. I've cleaned it today so I'll see if it changes anything.

[@keeganhache6667]

@@Matthew-wj8cm it could be your left side crank seal behind the magneto magnet. Remove the magnet to uncover the seal and then use a socket that just fits over the end of it and tap it in until it is flush with the case

[@scootertuningfl2174]

right on brother 66 works good for my altitude in fl and for you 70 should be good where youre at💯

[@keeganhache6667]

Thanks bro gonna be ordering some jets soon for my carbs and I’m really going to fine tune them and get the most of out the NT carbs that are on my other bikes.

[@scootertuningfl2174]

@@keeganhache6667 word i know youll get them perfect⚙⚙🚲🚲⚙⚙

[@jasonsierchio1167]

Facts... I'm in FL and yesterday swapped out the stock jet to a 65 and it runs pretty damn good... gonna mess around next weekend with other sizes for research purposes lol

[@vinnyd.thetwo-strokething8213]

an interesting side note: the top "cap" pf the HP carb where the cable enters, being plastic, can be modified for any other cable end as I've done with mine with an old Triumph motorcycle cable and throttle grip

[@keeganhache6667]

Yea I just used the one from the N/T carb and that helped it return to idle. update: the carb has been working awesome and it’s a lot smoother than the standard N/T.

[@bikerevolutiontv]

Mine ran good in cold high altitude weather on a 65 or 68 jet. Brought the bike to sea level and did not run no matter what. At sea level getting 45mph on a bofang and was getting that same speed at high altitude with the hp. Benefit for my when using the hp, it ran when under 20 degrees at high altitude when the bofang would not start at all

[@keeganhache6667]

Yeah changing elevation a lot can effect these small engines for the worst. Like I mentioned if you go with the real aerbo carb you can adjust the air/fuel screw on the fly which is way easier than changing out the main jet all the time. Sometimes the needle clip will get you by too.

[@kirkedwards2988]

While I dont know how well this carb works on a 2 stroke engine, I can tell you it sure helped my 4 stroke run way better them the carb that came with the 4 stroke engine. But, it does need jetti g down a bit. I think its jetted for a 80 or 100cc engine and my 4 stroke is a baby 49cc. Anyway, I do recommend this carb for a 4 stroke.

[@keeganhache6667]

Yup they can run decent but a fully adjustable carb is better in the long run

[@jasonsierchio1167]

I changed out the jet to a 65 and def. gained a lot of speed.. I think the stock jet was too large? I was topping out at 30... now I can go past that... how far past? I'm about to find out :P :P :P

[@MartinMartin-gk9yk]

How to fix the white ring pin around the jetting?

[@jimjensen1096]

Nice video, very helpful. You mentioned drilling out a hole in the house carb and that you would show a picture. Maybe next time around?

[@keeganhache6667]

Yes my man I will definitely include that in the next video about the carb! Sorry I forgot to mention it I didn’t have micro drill bits at that time but basically if your bike is running to lean at those set throttle positions you will drill out the hole slightly to allow more fuel to be pulled into the air/fuel mix.

[@jimjensen1096]

@@keeganhache6667 ok thank you. I'm still breaking it in so don't want to push it too much. I'm in Florida so still guessing which jet to go with. I have from #64 to #75, thinking 71 or 72 may be about right. Thank you again!

[@jasonsierchio1167]

@@jimjensen1096 I'm in FL... I just threw a 65 in it and it's working pretty good... maybe I'll F around next weekend and jet up just for research purpose lol

[@IRL100]

When I start the engine it opens full throttle on its own. Can you help me 

[@gunbuster333SMSTI]

I’m currently running to lean on one of these carburetors on my bike. One I’m around half throttle it’s OK but then when I reach full throttle, I slow down and set up speed up😂 It’s really annoying because it feels like that extra twist in the handle should give you more speed but I kind of just have to find tune it to a specific spot which is like a half turn and that’s just enough for me to move and reach my 24 25 mph speeds, but it still feels like I should have more power than I do especially on an uphill

[@gunbuster333SMSTI]

And I get it it’s only a 50 cc engine but still it feels like it’s lacking in power and some forms told me that it’s most likely running to lean😂 but I guess I’ll have to do some more research on drilling a hole on that middle pin and hey if I break it, I can always go back to the NT carburetor🎉 I know it’s dumb to say this, but if you want to see the bike, then I’ve been posting videos on my channel about it and the issues I’ve been fixing along the way

[@fletcherjacobs3688]

Stock jet is 70. 65 jet for sea level on port matched engines.

[@user-xx5db5lk1e]

Because mine sounds like a beast

[@jray4957]

💯👍🏾

[@patbrown9255]

I just bought it h p car brother in my don't work because it needed inside won't go up

[@anthonyzamano3929]

I tried to switch to jet, but the jets are different

[@jorelldye4346]

Hey Keegan. I bought this carb as well as an Oz reed valve and deluxe pipe (mz65). Do you think the stock nt jet is rich enough for the higher airflow with the 3rd transfer and window piston?

[@keeganhache6667]

With the third transfer port you may need to up size your main jet to like a #72. Also your altitude plays a huge part in what jets run too. With my piston port setup on the black and blue bike I find that a #70 jet words great.

[@rylibritton8406]

tell me how it goes planning on doing the exact same things to my bt100

[@pitapitabread]

recently, i've been getting ZK branded HP carb's that have a jet that looks like a #70. is that right? ... So I like to experiment and install a #68 or #72 depending on which engine the carb' is on. BTW the threaded shank diameter is 7mm and the screw head is 6mm on the jet for the HP carb'.

[@keeganhache6667]

Yeah I think china is getting it right putting in motorized bike sized jets in

[@lifesadventureskeepingitre1180]

It's not that it's not a hobby for me it's a learning experience I love these type of motorized bicycles.. Maybe you can tell me what I'm doing wrong I did everything your video said and my carburetor worked for a little bit and then it quit on me again did I get a faulty one should I return it and get another one. I'm just learning about this stuff. And I want to learn more.

[@taurianharris9985]

That's how I'm trying to do with mines

[@worldme8153]

You probably have to get a pack of different sized jets

[@tatartudor8467]

I have a problem with my bike, I would really apreciate if you could find time to help me. So it starts kinda hard, and then it idle properly, but when I left the throttle after a couple minutes of full throttle, it starts reving even higher. It had a problem staing on, even with the idle screw screwed all the way in so I grind a little from the flap to make more room for air. This solved the probleme, but on a new engine I think it will idle way to high. This is a 66cc 2 stroke, piston port, with a full speed around 55km/h. And it have around 6000 km so far on this set, the bottom end have way more, around 15000km, but it dosent have leaks so I think its still working properly. I recently change the piston rings, beliving that those could be the problem, and indeed the old ones were wore off. I didnt change the piston or cylinder yet, and it still rev like crazy after riding wot for awhile. I try with another carb and the same problem occured (with the same jet). Going up on the jet, will make the engine start easier, but its performance decrease semnificantly, getting only to 30-35km/h. This new generation of sets from the past couple of years, I noticed have the piston skirt for transfer lower with almost 1mm. And have a sever decrease in performance.

[@keeganhache6667]

You sir have a air leak look for any wet gaskets and make sure both crank seals are properly installed

[@billaugustin1928]

I have 2 of these on 2 gomax pk80 bikes with the g4 cylinders that are factory ported, they worked great the first couple of years and idled perfect, now since I rebuilt both top ends with the same parts, they both won't idle right, at full throttle it takes a few seconds to idle down when I release the throttle but won't idle down when I'm going downhills? I have 62 jets in them both for 1500 ft elevation in southern Oregon. The idle screw doesn't adjust anything either?

[@keeganhache6667]

You might have a air leak or the jet is to small for the new cylinders. Break both of them in with stock jetting

[@billaugustin1928]

@@keeganhache6667 stock jets on those runtong clone carbs are 78s, I got it fixed now , I bought new carburetors for them, thanks for answering.

[@michelmullaney3641]

Hey bro … So listen I need a little help bro… I got a pwk 21mm and I need it to fit the 13mm 80cc port with a boot..anyone know what I can get to make this happen or work?

[@keeganhache6667]

No that’s such a big difference in size sry bro you will need to make one or get a g2 reed then adapt

[@edwardbeierlein2587]

I’m having some difficulty getting my HP to un choke. 99% of the time it won’t un choke so I have to do it manually. The times that I did get it to un choke I’ve been twisting the throttle to the breaking point. Any advice or suggestions? One person of considerable credibility suggested that I needed to switch out the standard twist throttle for an upgraded aluminum style, but I can’t understand why that would make a difference, plus I’d lose the kill switch.

[@keeganhache6667]

Yeah the throttle style has nothing to do with that. That little arm that is supposed to catch and release the choke you may need to bend it side to side and play with it a little to make it unchoke

[@buddahmayne9273]

​@@keeganhache6667about how much throttle is needed for it to properly release the choke?

[@thewaffle3945]

witch fuel cable u recommend for this carb? i used 8mm and the carb drowned in fuel

[@keeganhache6667]

5mm gas line or 3/16 will work

[@BuildBreakFix]

I love both these carbs! They melt super fast in my melting furnace to make carb boots for good carbs lol😅 I know off topic of video you did. Buy a nibbi 18 or 19mm carb. Going to be like 45$... I know expensive compaired to most carbs. Once you buy one.... you will never want to use anything else. Try it you won't regret it! Out of every carb I owned. Most easy carbs to tune and run ever seen

[@keeganhache6667]

I own 2 pwk’s… that’s the same carb Moses raced in SoCal and I bought jet kits for both and tuned them to perfection. They run great and I’m happy with them. Nibbi is just another brand to choose from. I’m getting a cdh67 pipe to try out so expect a video coming up for that! Also I’m currently trying to save my money for my car it’s most likely going to be a V6 charger lol.

[@jgbelmont]

Do you get more low end torque with this carb?

[@keeganhache6667]

No you notice more rpm and a smoother ride. I wouldn’t say that one carb makes more power than the other. But the HP carb if tuned right will have no 4 stroking problems like the NT is known for.

[@user-xx5db5lk1e]

Let's talk about timing

[@leonardarola]

Get an oko or pwk, if you have the dough for it, go mikuni all the way.

[@keeganhache6667]

Yup I got 2 of them now Great carbs

[@leonardarola]

@@keeganhache6667 There you go, boss. Now the wonderful and very pleasant jetting phase.

[@keeganhache6667]

Already got that done lol the first one I bought went on the Harley and the second one went on my felt faker bike. I love that they are so tuneable and easy to work with. However I would not use one on a stock engine because the won’t “flow” this carb very well. Also I’m using my new degree wheel and I love that too. Always advancing in the hobby

[@worscohli]

Why would they make a carburetor with a jet thingy that doesnt work "correctly"? like, wht does tht even mean

[@keeganhache6667]

Y’a they take 9mm jets

[@worscohli]

what would happen if i didnt change the 9mm jet to a 6mm?

[@user-xx5db5lk1e]

Totally rigged up. No brakes

[@seriousskateboarding9938]

So.... 0mph increase.

[@keeganhache6667]

I’ve gotten way better top speeds with this carb if you tune it right they work awesome

[@Justice-oc1zv]

I think that carb is trash I have more hp and better gas mileage with the NT WAY BETTER THIS CARB IS A WASTE OF MONEY

[@keeganhache6667]

Yea it’s not the best of the best that’s for sure I’ve used the pwk carbs dellorto’s Pz’s and found those to be better options

[@BjornHansen314]

Get a f2 thruster exhaust. There's no point in upgrading the carburetor when you have the worst exhaust pipe possible.

[@keeganhache6667]

Buddy I have a mz65 what are you taking about