Kayfun Prime by SXK or YFTK? (Attack of the clone)

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muth

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Yes i have a few of them and they are excellent. Very much like the standard V3 minis, but can hold more juice and can take slightly more air, eventhough you need to adjust the airflow by removing the 510 screw and bottom plate. They are close to 24mm BTW.

These wrenches are very useful to adjust the airflow
Great to hear. I bought one and find it as flavorful as the Prime. I never bothered to adjust the AF because it's working out fine as is but I appreciate the link to that handy little tool.
 

muth

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Yes they are China based and i ordered there numerous times without any problems, so did several people i know. Excellent shop.
That's also great to hear. I understand they're based in Hong Kong or, at least, they ship from there. They seem to stock more of the old school devices. When I found them I thought it was too good to be true, so thx again for the helpful information.
 
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smoked25years

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MBR70 o-rings are what you might be looking for.
Checkout Our Buna 70 Orings | Orings And More.

That's where I got mine. But she'll need the metric sizes
metric orings

I also bought silicone.
metric silicone orings

So if the picture says 18*1.5 then get a 21*1.5 o-ring, and for 11*1 you'd need a 13*1 o-ring, and so on..

Actually, the store that you linked lists them by ID. So if she needs 18*1.5, then she should search 1.5 for 18.

Fasttech often lists them by OD. Also, Fasttech has an o-ring set for the Prime. Not as nice as the o-rings from oringsandmore but it's cheap and some people prefer the convenience of a kit.

9625157-1.jpg



Are you using it for the 5mm nut driver? I use the Wera 5mm hollow shaft nut driver. Wiha also makes a nice one. I have both the full size and the precision. The full size is more practical but the precision is nice and compact.

IMG_2601.JPG
 
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smoked25years

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Here's one of my clones with the o-rings that I bought in the USA.

I use mostly silicone. I do use a Buna o-ring for the air flow adjustment because the air flow opening chews up o-rings and the Buna is cheaper.

IMG_2602.JPG



One of these silicone o-rings is used for 4 months and the other is new. Still looks like new.

IMG_2603.JPG
 

Leo Bak

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That's also great to hear. I understand they're based in Hong Kong or, at least, they ship from there. They seem to stock more of the old school devices. When I found them I thought it was too good to be true, so thx again for the helpful information.
I'm not sure where they are located, their offices seem to be in Germany and China, but like a lot of vaping companies they could very well be in Hong Kong. I bought a bunch of Taifuns and SXK KF5 minis there, also the regular SXK KF5s are still in stock.

I once asked SXK what the minimal batch would be to produce out of stock items, and they were willing to make a batch of the minis if i bought 500 of them LOL. Apparently Vapeyaya does order such batches from SXK.

That's where I got mine. But she'll need the metric sizes
metric orings
I also bought silicone.
metric silicone orings
Actually, the store that you linked lists them by ID. So if she needs 18*1.5, then she should search 1.5 for 18.

Fasttech often lists them by OD. Also, Fasttech has an o-ring set for the Prime. Not as nice as the o-rings from oringsandmore but it's cheap and some people prefer the convenience of a kit.

Are you using it for the 5mm nut driver? I use the Wera 5mm hollow shaft nut driver. Wiha also makes a nice one. I have both the full size and the precision. The full size is more practical but the precision is nice and compact.
Useful info on the o-rings, thanks. And yes i use the wrench to remove that 5mm nut. At some point in my life i need to get better tools, but i started vaping with a blunt old nailclipper for wire and a pointy knife as a Philips screwdriver, so it's slow progress.
 
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muth

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Here's one of my clones with the o-rings that I bought in the USA.

I use mostly silicone. I do use a Buna o-ring for the air flow adjustment because the air flow opening chews up o-rings and the Buna is cheaper.

View attachment 807319


One of these silicone o-rings is used for 4 months and the other is new. Still looks like new.

View attachment 807321
Sweet! Btw, the Buna website says the heat resistance on their nitrile o-rings is 250*F. That's not very high compared to fluorocarbon and others. Which class of silicone rings are the ones you pictured above?
 

muth

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A Kyflon 3050 might well be worth a try for the seal that goes below the build deck. They are listed on Process Technologies as FDA and USP compliant and have the highest service temperature.

Then when we know that they work, a full retrofit is in order.
I'm going to set some time aside to find a place that sells them and offers samples. I got some silicone plugs that way.
 

Leo Bak

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@muth Airflow-wise the KF5 Mini is positioned between the KF5 and the Prime, tending maybe more towards the draw of the KF5.

Eventhough the Mini is only a few mm. taller than the Prime (they're all 22mm. in diameter BTW), both the builddeck and the chamber are a little bit bigger, so you can use slightly larger coils, and some more Watts, allowing you to use more liquid too, as the juiceholes are a fraction bigger aswell. You'd build it more like a KF5, but the shorter chimney of the Mini creates more, and more dense flavour than the KF5.

The flavour however is hard to compare with the Prime, since both tanks do not give the same type of vapour. Also, i have only tried the SXK, Ulton and the YFTK Primes, liked the YFTK best, but still prefer the KF5 mini. I'd call that a matter of personal taste.

If you'd want MTL, stick with the Prime, KFL+ 2 or 3, the KFL19 or the KF Mini 3(+). If you'd prefer slightly more airflow get the KF5 Mini, for rDL get the KF5, for even slightly more air, get the KF5-2 which is almost a DL tank IMO. Never tried the KF4.

Flavourwise the KF Mini 3+ is my favorite, followed by the KFL+3 (somehow lost the +2), then comes the KF5 Mini, then the KF Prime, then the KF5, the KFL19 and the KF5-2. But this could very well be caused by how i build them and the liquid (50/50, 3mg, tobaccos) i use. And i have not given the KFL19 enough time, so my opinion might very well change in the near future on that tank.

If you'd want to get a KF5 Mini however, make sure you get the SXK version, since all other versions are utter garbage, especially the ST ones.
 
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smoked25years

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Useful info on the o-rings, thanks. And yes i use the wrench to remove that 5mm nut. At some point in my life i need to get better tools, but i started vaping with a blunt old nailclipper for wire and a pointy knife as a Philips screwdriver, so it's slow progress.

A knife as a Phillips screwdriver?!

Sweet! Btw, the Buna website says the heat resistance on their nitrile o-rings is 250*F. That's not very high compared to fluorocarbon and others. Which class of silicone rings are the ones you pictured above?

The o-rings are never in contact with the coil. I wasn't especially concerned about temp resistance. I did want a higher quality with a known composition that is food safe. I've heard horror stories about China recycling waste in rubber products.

According to the store the silicone is heat resistant up to 400 and 450 intermittent to -75F...

"FDA approved Silicone O-rings are used in Food and Medical Industry Equipment and any other applications that require Food Grade or high heat applications. Silicone O-rings 70 Durometer are heat resistant up to 400*F and 450* intermittent to -75*F. Typically used in applications with engine and transmission oil, animal an vegetable oil and grease, Brake fluid (non petroleum base), fire resistant hydraulic fluid, moderately water resistant and diluted salt solutions. "

I'm looking for an honest opinion by KF users. Obviously, you like MTL and flavor. Have you tried various other MTL RTAs? I have and I seem to come back to my KFs. If you've tried other MTL RTAs with equal flavor I'd love to hear about it.

I have several but I've packed everything away except the Prime.

@muth You might want to give the KWH Dvarw MTL a try, excellent clones available aswell.

The Dvarw is nice. I have the 16 and 22 MTL Dvarws.
 
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muth

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I've heard horror stories about China recycling waste in rubber products.
I knew it! Everything rubber from China smells to high heaven!
I have several but I've packed everything away except the Prime.
I knew there must be a reason why I like that little thing so much!
The Dvarw is nice. I have the 16 and 22 MTL Dvarws.
Thx:)my friend likes them, too. Maybe I'll try....or maybe I'll get another Prime;)
 
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Leo Bak

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I'll only buy one if you can spell it phonetically for me:lol:
Easy:

Dvarw - [dvɔːw]
1a: an rta of unusually small stature and big flavor (see STATUREsense 1) especially: a tank whose height does not exceed 3" and is typically less than 2"
b: an insignificant rta - a literary dvarw

Now go get it and show us the pics!
 
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muth

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Leo Bak

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My guess would be they have an OD of 22*1.5 mm, that's ID 19*1.5 mm, since the glass is 22mm too.

Two full turns should be sufficient, make sure you're not overwicking the deck.

Also adjusting the airflow impacts the juiceflow, that is, the tighter the airflow, the more liquid is forced out of the tank, because when taking a puff with tight airflow, the underpressure also hits the juiceholes.
 
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muth

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My guess would be they have an OD of 22*1.5 mm, that's ID 19*1.5 mm, since the glass is 22mm too.

Two full turns should be sufficient, make sure you're not overwicking the deck.

Also adjusting the airflow impacts the juiceflow, that is, the tighter the airflow, the more liquid is forced out of the tank, because when taking a puff with tight airflow, the underpressure also hits the juiceholes.
2 full turns is what I usually do. I changed the o-ring(s) and it's better but I really need to get better ones. The set that came with the clone is really crappy. The one I took off had a large indentation in the side.
 
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