I finally got around to jetting one of those carbs the other day, and it tripled the power of my bike, according to the speedO, I was doing 40mph and it still had plenty of throttle, I'm 6'2" 240lbs, now I'm wondering what I'm going to do with these useless reed-valves and ridiculously big PWK 21 and 28mm carbs I have, lol, because if I can get that kind of power from a hi-compression head, $25 hi-performance carb, offset intake and a cheap expansion-chamber, that's way more than I'll ever need,
Hey Nick this is just a suggestion get yourself some gas thread tape and wrap the filter so it's kind of fat and then shove your gas line over it and then tighten it down you'll notice there's no leaks
My HP carburetor works well but when the bike is stopped it shuts off, I use a .65 jet, I don't know how to solve it, it only stays when the starter is activated
@@killerG0952 sometimes they're just rubbish straight out of the box. But I had an idea - is the thin gasket under the throttle cap intact? You might be getting an air leak through that?
Oh yeah, they're completely different experiences. Next video I swap the jets out of the NT and it made a huge difference again. I'm waiting on a jet kit to arrive from china so I can really get it dialled in
You need to get rid of that airbox think on that new carb, it's choking the motor big time...try it without filter setup for a blokky see how it hauls arse .
All my bikes got stolen about a year ago. Usually my preference was to run just the foam held in place from the inner cage from the NT. In the end I didn't like the HP and went back to an NT speed
The HP isn't really suitable for a stock 66cc. It did reduce the 4 stroking but also limited RPMs and top speed. I've heard that Mikuni is the carb of choice for high performance builds but I've never tried one myself
I find my problem with power.That was air filter!!!I remove sponge and put a part of stocking ;-).Now engine work exellent.I think to stay with my NT carburator.What you think about that?
It's been tested and proven in the dusty hell that is Nevada that the air filter and box are basically just optional extras. I keep them on for the wet and mud and it makes my brain happy. I'll try find that video of that guy who did that filter test
@@NicksBikes please do this up grade I have polished my ports on my bike inlet to the carb and the out let exhaust and sawn off the baffle in the exhaust and naw my bike dose 48mph huge increase in power whoooohooooooo
Almost all of my stock 80's only did about 40-45. It might just be a break in glitch, these engines smooth out after a few tanks. Might be your oil-fuel ratio is too rich, if you're doing 16:1 like the engine manuals say. Try 40:1. You may be getting poor spark from the stock spark plug, try an NGK B6HS as a replacement. But most likely of all is the carb needs tuning. I'm just spitballing here, do you have video you can upload of the bike running
@@NicksBikes Thx Nick,I,m try change my spark plug first.40:1 is a 40ml for 1 ltr?Soryy for question,but I,m never had before motorized bike.This is my first contact with engine.Thx again for helping Nick.
@@NicksBikes Thx Nick,I check my carburator last nite and sponge on the air filter is completely destroyed!!!Maybe that is reason for my less speed?What you think?
@@mattyr.4328 you can run without an air filter but you'll need to set the carb needle clip down a notch to richen your air/fuel mix to compensate for the extra air flow
Straight out of the box it is. Next video I'm putting up is swapping the stock jet from the NT into the HP. I mean, it's all I have on hand until my new jets arrive from china whenever that will be, but re-jetting the HP makes a world of difference
You got to jet it, you can't judge a carburetor on being better by it happening to have the closest jet to what you need.if an NT carburetor was slightly better in any respect I would be using it 👍. You got to down yet till it cleans up and make sure the throttle slide isn't catching not letting it seat all the way causing a high idle.
@@JamesPiccone I can't wait until I finally get my jet kit. I have literally zero experience with jetting, but putting the nt jet into the hp already cut all of the bogging and 4 stroking I was getting with the stock nt. Same jet, different carb, world of difference!
@@NicksBikes once you have it jetted right you'll wish you'd done it sooner 👍 the jet that comes in a stock NT carb is it number #70 5mm the one in the runtong HP carb is #75 I think or #80. My yd100 uses a 61 jet and my 49 mm iron bore uses a 71. Basically the HP carb generally likes 60 -70 Jets.
@@JamesPiccone it frustrates me that it's so hard to get basic parts in aus. The estimated delivery of my jets is May and I ordered at the start of the month. Stupid that I can get the HP carb locally but not the jets
I finally got around to jetting one of those carbs the other day, and it tripled the power of my bike, according to the speedO, I was doing 40mph and it still had plenty of throttle, I'm 6'2" 240lbs, now I'm wondering what I'm going to do with these useless reed-valves and ridiculously big PWK 21 and 28mm carbs I have, lol, because if I can get that kind of power from a hi-compression head, $25 hi-performance carb, offset intake and a cheap expansion-chamber, that's way more than I'll ever need,
That's awesome!
Did you jet the Hp carburator or the Nt???
With jet you ended up using on the HP carburator?
What jet you use?
@@NicksBikesbroo you know that gold Clutch arm screw can be flipped upside down
Hey man i love your new profile picture!👍 your handy phone Mount! Nice!
Yeah it was a screen shot from a few videos ago. I just happened to pause while going through my ride footage lol
@@NicksBikes nice
Hey Nick this is just a suggestion get yourself some gas thread tape and wrap the filter so it's kind of fat and then shove your gas line over it and then tighten it down you'll notice there's no leaks
Funny story, I've got thread tape 😅 Good advice👍
@@NicksBikes I keep a whole roll of it in my kit at all times you never know when you need it
My HP carburetor works well but when the bike is stopped it shuts off, I use a .65 jet, I don't know how to solve it, it only stays when the starter is activated
It sounds like you need to adjust the idle, maybe?
@@NicksBikes When I adjust the idle screw it stays accelerated or turns off, I don't know what it could be 😭
@@killerG0952 sometimes they're just rubbish straight out of the box. But I had an idea - is the thin gasket under the throttle cap intact? You might be getting an air leak through that?
Did it make a big difference switching them?
Oh yeah, they're completely different experiences. Next video I swap the jets out of the NT and it made a huge difference again. I'm waiting on a jet kit to arrive from china so I can really get it dialled in
@@NicksBikes sweet! Cant wait!
You need to get rid of that airbox think on that new carb, it's choking the motor big time...try it without filter setup for a blokky see how it hauls arse .
All my bikes got stolen about a year ago. Usually my preference was to run just the foam held in place from the inner cage from the NT. In the end I didn't like the HP and went back to an NT speed
High perfomance carburator is a better then orginal one?Giving more power?
The HP isn't really suitable for a stock 66cc. It did reduce the 4 stroking but also limited RPMs and top speed. I've heard that Mikuni is the carb of choice for high performance builds but I've never tried one myself
@@NicksBikes I woudlike swap my stock carburator for a racing carburator,this is good decision Nick?or not?Thx for advice.
So long as it is jetted properly 👍You can get good performance from the NT carb just by changing jets
Many thx Nick.
@@NicksBikes What size jets? 70 or 75?
Hi,Nick.Matty again.When I swap engine 80cc to 100cc i can using same carburator from 80cc?
Yeah the carbs are the same
@@NicksBikes I find on ebay cheap 100cc engine and planning to swap.I must buy something else?
@@mattyr.4328 no, just swap the engine and save the rest of the kit for spares
@@NicksBikes Thx Nick.
I find my problem with power.That was air filter!!!I remove sponge and put a part of stocking ;-).Now engine work exellent.I think to stay with my NT carburator.What you think about that?
The NT is a perfectly capable carb.
I run mine with just the foam, no air box. The box is very restrictive
@@NicksBikes I try that.Thx for advice.
If I broke it string on the top part can I still use the caberaber? Can't seem to line up the inside setup with string broke off now
Not sure what you mean?
All you need to do for more power is take out the sponge from the air box and put a few holes in it mine is way faster now and it runs way better
It's been tested and proven in the dusty hell that is Nevada that the air filter and box are basically just optional extras. I keep them on for the wet and mud and it makes my brain happy. I'll try find that video of that guy who did that filter test
@@NicksBikes th-cam.com/video/dWdCOC21LZA/w-d-xo.html watch this honest its fine with no air filter promise
@@NicksBikes th-cam.com/video/JcAcvaGbUDg/w-d-xo.html watch please
Yah, exactly what I was on about 👍
@@NicksBikes please do this up grade I have polished my ports on my bike inlet to the carb and the out let exhaust and sawn off the baffle in the exhaust and naw my bike dose 48mph huge increase in power whoooohooooooo
Hi Nick,I have a 80cc engine,but my bike have only 30km/h maximum speed!!!you know why?
Almost all of my stock 80's only did about 40-45. It might just be a break in glitch, these engines smooth out after a few tanks. Might be your oil-fuel ratio is too rich, if you're doing 16:1 like the engine manuals say. Try 40:1. You may be getting poor spark from the stock spark plug, try an NGK B6HS as a replacement.
But most likely of all is the carb needs tuning. I'm just spitballing here, do you have video you can upload of the bike running
@@NicksBikes Thx Nick,I,m try change my spark plug first.40:1 is a 40ml for 1 ltr?Soryy for question,but I,m never had before motorized bike.This is my first contact with engine.Thx again for helping Nick.
@@mattyr.4328 40:1 is 25ml oil to one litre fuel.
Here's a link to a fuel mix chart
2strokemix.com/2-stroke-mix-charts/
@@NicksBikes Thx Nick,I check my carburator last nite and sponge on the air filter is completely destroyed!!!Maybe that is reason for my less speed?What you think?
@@mattyr.4328 you can run without an air filter but you'll need to set the carb needle clip down a notch to richen your air/fuel mix to compensate for the extra air flow
Get another carburetor from a different place similar problem with mine your carburetor was poor quality
So it's overrated?
Straight out of the box it is.
Next video I'm putting up is swapping the stock jet from the NT into the HP. I mean, it's all I have on hand until my new jets arrive from china whenever that will be, but re-jetting the HP makes a world of difference
You got to jet it, you can't judge a carburetor on being better by it happening to have the closest jet to what you need.if an NT carburetor was slightly better in any respect I would be using it 👍. You got to down yet till it cleans up and make sure the throttle slide isn't catching not letting it seat all the way causing a high idle.
@@JamesPiccone I can't wait until I finally get my jet kit. I have literally zero experience with jetting, but putting the nt jet into the hp already cut all of the bogging and 4 stroking I was getting with the stock nt. Same jet, different carb, world of difference!
@@NicksBikes once you have it jetted right you'll wish you'd done it sooner 👍
the jet that comes in a stock NT carb is it number #70 5mm the one in the runtong HP carb is #75 I think or #80. My yd100 uses a 61 jet and my 49 mm iron bore uses a 71. Basically the HP carb generally likes 60 -70 Jets.
@@JamesPiccone it frustrates me that it's so hard to get basic parts in aus. The estimated delivery of my jets is May and I ordered at the start of the month. Stupid that I can get the HP carb locally but not the jets
Janky!
Lol yeah as with most things I do