PHBG carb question

[br4inl3ss]

hi.
so i'm about to put a phbg on my 139qmb soon.
many many many people do it ( but rarely they tale about ).
im looking at the naraku or motoforce phbg carb, or any other quality dellorto clone.
thing is that i just read that dellorto carb come with either a AN or a AU atomizer. AN for 4 stroke, AU for 2 broke.
ive read that using a AN 4 stroke atomizer in a 2 broke engine can make it extremly rich at idle.
not sure this is true, apparently 90% of dellorto comes with AN 4 stroke atomizer and i havent seen anyone change this part on a 2 broke engine ( like zuma and pgo ) when they use dellorto carb.. 
but anyway.... what does it change really ? can they both be used on anything but maybe a bit harder to tune ?

there is absolutly no info in any of the phbg carb ive seen as to what they comes with so if 2 broke atomizer is installed, i might have a problem.  not going crazy on size. either 17.5 ( naraku ) or 19 ( motoforce ) since its what is available.

[kosmos]

If you check treatland.tv they tell you what atomizers they put in with the carbs. I think but not sure that's what they come with in them stock. they sell the 21mm 21mm phbg spigot with the au (2 stroke) and the 19mm with the 4 stroke atomizer 19mm phbg They also sell atomizers as well, 12$ each.

[br4inl3ss]

thanks for that site.
i know i can buy atomized, but i'm in canada where they either scam huge time or its just not avaialble, so i didnt even check if it was an option.

is it the same for other brand making phbg ? as i said i'm looking at the naraku or motoforce or anything decently priced. so forget dellorto stage6 polini swr nibbi and so on. 2 years ago i would but a dellorto whatever the price but things have changed and this scooter cost me way too much already.

so many people i know run aliexpress dirt cheap carb with absolutly NO problem whatsoever for years... thats the way id go, but none available fast enought or they're weirdo model like some OEM that wont fit at all. so after looking online, i can only only go with naraku at best ( higher price of 129 CAD ) or motoforce ( 90 CAD ).

it seems like the naraku is a very popular one, so i tought id be able to gather some info since sellers doesnt give any.

do all phbg use the same parts just like cvk ? ive heard that other phgb brands are perfect clone of dellorto pgbh. so bowl seal atomizer needle and jets should all be interchangable ?

[aeroxbud]

Wouldn't you be better off just buying the correct V.3 Naraku carb for a Your stroke?
I'm sure I've heard about people being disappointed with the performance of a lot of two stroke carbs on four stroke engines. The lack of an accelerator pump means it doesn't fuel well at higher revs.

[br4inl3ss]

May 27, 2023 14:37:56 GMT -5 aeroxbud said:

Wouldn't you be better off just buying the correct V.3 Naraku carb for a Your stroke?
I'm sure I've heard about people being disappointed with the performance of a lot of two stroke carbs on four stroke engines. The lack of an accelerator pump means it doesn't fuel well at higher revs.

thanks. the accelerator pump is not for high rev. you're mixing it with power jet on some 2 broke carburetor its to help in compensation for the vacuum operated diaphragm when applying throttle.

i do have the naraku v3 carb made for the engine.  its still a nightmare of "slanted" bowl. also i have NO leaks at all, completly rebuilt, properly adjusted valve and whatever its all fine everywhere, yet cannot be tuned half decently. first is that float height nightmare, and then idle cannot be tuned properly ( impossible to make it idle decently under 2200 pm even tho it should be at 1700-2000 ), 90 main is a bit too big ( 10.0:1 afr ) and 88 si wayyyyy to small ( 16.0:1 - 18.0:1 afr ).

i even borrowed money to get a real undecently priced keihin carb, nothing fix my issue. so i returned this useless overprice carb and then bought the naraku racing v2, the one the whole planet recommend as a decently priced QUALITY carb. its been replaced by scootertuning sicne it was used ( scratched everywhere in the venturi and missing "jet" in the bowl ( the one used for the accelerator pump ). the brand new one was betetr but absolutly nothing fix the issues.  im runnign the Glixal 20mm carb right now. way better. but still has some issue impossible to fix. 

ive been told to try a non vacuum operated carb first since nothing fix the issue and no one can think of anything else ( the damn valve or a intake leak ). but thsoe ahve been verified about 30 time now. i know its useless but when people are stubbord its the problem when tis not, you dont have any other choice.

i even changed the valve and lapped them ( old and new ) and no leak there too. 

what other option do i have.... NONE.

it runs so damn strong tho... sometime it want to stall because its way too rich but i restart it full throttle, it start right away, i have to clear fuel and then its fine for some time. still way too rich but i mean it wont stall for some time. it can be stronger if it isnt constantly flooded.....
i had uninstalled the wideband gauge because its temporary for tuning it. but had to reinstall it once again its impossible to tune right and before it was changing mid ride for no reason. it was causing my engine high heat issue ( reach 350 F in a 18 C day for a 5 minute ride WTF ). changed the main jet, put back the wideband, and voila didn see it hit 300 F yet even today at 26 C.
its pretty damn stable at 10.0:1 - 11.0:1 at any throttle or rpm tho. its 11.0:1 at 0-25 % throttle, and crazy rich 10.0:1 ( or even worse my gauge stop at 10 ) at 25-100% throttle. 

so yeah thats why i want a REAL carb on here. no nightmare weirdo slanted bowl, way easier to set float height, can get better quality at lower price ( draphragm isnt free and a decent one cost alot of money ), and way easier to get.  duno if you was reading all my other psots with all the carb problems i had, but tis been alot of carb repalced... i'm so done.  if the issue could be resolved i wouldnt swap to a phgb carb.

[aeroxbud]

The accelerator pump sprays a controlled amount of gas every time the throttle is wide open. When you want high revs.
I know your frustrated, but every time I tried cheap carbs I had nothing but trouble. By modifying a carb you run the risk of causing yourself even more headaches.

[br4inl3ss]

not just wide open. thats the thing. even 1/3 throttle it squirt. all CVK motorcycle carb ive seen do the same.

you are right about chinese cheap carb ( cvk at least... never seen anyone have trouble with normal chinese carb ), but even the keihin didnt change a thing so they're fine. in my case at least. unless keihin magically became the biggest crap ever instead of the best....

i am frustrated. all the money that thing stole me... ive spent so much money doing what people here said ( stubborn its valve or air leak without even reading properly that THERE IS NONE ) that ic ant afford any "real" parts now and still at the same point. thats why im saying trying a pwk ( phbg ) is my only option now. unless someone magically stop bein stubborn about valve and leak and actually HELP, then i have NO option left.