Got a kayfun v4 (clone) today.... awesome.

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Smellybelly

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Sep 29, 2015
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So today I was at the local shop and really wanting a new tank to play with and kinda wanting the Griffin but alas they didn't have any. But I saw a kayfun ehpro clone and it was marked 50% off so I though why not. I had heard that these things are ridiculously complicated so I was apprehensive on building it myself so I had the worker build it. Guy hadn't built one in so long that he almost forgot how to but nonetheless got it working but the ohms kept jumping around from 1.5 to 2.5 and all over in between. So I re built it after watching pbusardo's review (God that was long but worth it). Put a 26 guage n80 9 wrap single coil in it and it's working way better and at around 1.09 ohms. Now mind you I don't ever vape with high resistance like that. Normally I'm around .2 ohms on a dripper and mech. Like always except my goblin mini which is at .4 and 40 watts. Anyways this thing is awesome and the airflow is perfect for a tank IMO. didn't have any problems with wicking or leaking though it took me a good 10 minutes to really remember which way to turn it to turn off the juice control (the whole concept of juice control is foreign to me). This may be my new favorite vape. I just wish the authentic wasn't so expensive because I really hate clones. But no way was I going to drop that cash if I didn't even know if I would like it. Question though. In the manual it recommends not to go higher than 20 watts. Am I at risk of melting something or am I good if I go up to say 30 or 35 watts. Also what kinda builds do you guys like in yours?
 
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DaveP

PV Master & Musician
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May 22, 2010
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My K4s are EHPro clones. The complexity only comes into play if you take it apart and reassemble it. There's lots of parts that are sealed together by O-rings, unlike the K3 that has only two or three that you would need to replace on a regular basis. One of these is the #16 O-ring that seals the square part in the juice control ring. It's notorious for leaks.

The instructions tell you to close the juice control before filling. If you do this you will eventually roll or abrade the #16 ring. Instead, you can fill it through the top by removing the cap that holds the drip tip and fill around the sides of small chimney tube in the center and then replace the cap. Make sure you don't let juice get into the chimney.

One of the things I like about the K4 is that you can remove the coil deck and re-coil without emptying the juice. Just flip the K4 upside down and unscrew the coil deck. Remove the drip tip and it will sit on the counter upside down without leaking juice while you replace the coil and/or wick. To remove the deck you will have to loosen the contact screw on the bottom a turn or so.

It's s good flavor tank for low wattage vapers, but it's prone to juice weeping if it gets warm from body heat in your pocket.
 

Smellybelly

Senior Member
Sep 29, 2015
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Yeah once I dug down into it, I realized it wasn't necessary to go crazy on it, and being german, it all goes together in a reasonably sensible way. I have not had any leaking issues and the machine seems good, not perfection but good for a clone. The one thing I think is stupid is the afc. I mean I opened it all the way and haven't necessarily needed to adjust it but I like to mess around with airflow and seeing what the juices taste like with different settings. I haven't had any leaking issues... yet. Wouldn't opening up the top without closing the juice flow result in leaking? So far the juice flow operation operates very smoothly. Doesn't seem like there's any grinding or really hardly any resistance but the only rings got well lubed with e juice. And I don't know what juice weeping is.
 
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