Guys, ignore 808gx7r. he's quite misinformed and is an expert on what he "knows." Furthermore, he's only here to spread his mental diarrhea, as he's been kicked out of his local forums.

Please ignore him.

I'm thinking something to do with new metal long lsn? It does not fit as tight as the other long lsn. So my q was is it suppose to have 2 o-rings? I did try new o-ring same thing. When I did the ole underwater pressure test nothing showed up from there. But if it's heating up?
Also just so everyone knows this is not any type of attack or making the engine, Trey anyone associated with go in any way to look bad. This is me trying to figure out what if anything I did or am doing wrong. Trey Sistrunk,Grizz,Flanno and especially Matt from nitro North have been bending over backwards trying to help me figure this out. Could be I got that 1 with a carb issue. That simple. I will say that with the gxr carb with the short lsn I was able to dial it right in and it HAULS ASS!!!!!!!!!!!!!!!!!!!!

Yes, we know you well Matt, we know you are not attacking anyone or anything, so don't worry there.
Sorry, I cant answer that one for ya, not know if single or double O ring.
Just so I understand you....
So the GXII you have won't play nice with the original carby but runs sweet with your GXI carby ??
If that is the case, maybe there is a issue with your new carby...
1, when it's bolted in does the body rock/rotate a little ??
2, is the high end needle body/niple/alloy washer nipped up ??
3, is the high end needle body inside clear of obstruction that may be moving around (ie a very small piece of brocken off O ring) ??
4, is the throttle slide boot fitted correctly ??

5, if none of these then I'm lost for more ideas, and maybe you should see if you can get an exchange GXII carby :/

Of course no biggie...that's what we are all here for..to figure s*** out...have you ever dealt with a long lsn before?.....maybe that's the problem...maybe not.....If you send me the carb, I can take a look at it and run it on my engines...I don't have a gxii motor but my teamate has th gxii p/s/r in a gx5r case...so maybe I can tune it in on his motor,just to get it closer to the gxii tune...not saying your doing anything wrong...but it might take a third eye to see the 3d lol...j/k...but you know what I mean? Sometimes someone else can notice something that you are just not seeing

Hi Matt. I can confirm the new LSN only has one O Ring, same as the GX Series. Only change is the taper.
I have quite a few guys running the new GXII LSN in their GX Series motors with no problems at all.

Just something else that has cropped up here. One of my customers put the new GXII head and finned head button on his GX-3R, and had trouble with it running as per normal. As Trey mentioned the new motor has slightly higher compression, due I would think to a change in the new head button ??
Once my customer added a shim or two the motor came right. Something to be wary off perhaps with those upgrading to the new head.
Also the new GXII head and button use a different securing screw (S6-3158) which are 2mm longer than the GX Series screws (S6-3156).

I haven't tried it yet, but I am assuming the new heat sink won't fit the GX Series crankcase properly with the original head button ?

your right I needed to add .02mm shim when I switched it on my gxr-3port.As to the other q's you asked all checked,but I do notice 2 things. One, isn't the long lsn suppose to stay in the spray bar? So at full throttle it does not come all the way out? I noticed when I set mine to where everyone else is saying theirs are set at mine [lsn] comes all the way out of the spray bar. The other thing I noticed was that the slide boot was filled with fuel/oil not to the top but very wet. In order to get the needle not to come all the way out I am in almost 2 full turns. If in fact what I have just said is true wouldn't that cause my low end rich? Causing all sorts of problems?

all i can say is you have some patients, being a painter has somthing to do with that im sure!...lol, myself would sent it back and get new one. you should not be having these problems! right trey?

Ok here is what I do and Ron at Indy RC world when we get a motor to break in. Take the needles out and make sure the orings are not torn. They will be dry so we put losi grease or some kind of lubrication to keep them moist. Then we seal the motor. We have noticed a little play in the pinch bolt so we also seal it on both ends. Since we started doing this we have had no carb issues what so ever. The Gx2 runs best on the 2072 so far. The 5r runs the best to me with a 2072 on truggy and a re11 on buggy. The best plug i have ran on these motors is the c6 by far. The The Gx2 Carb is a lot easier to tune and way more forgiving and smooth. If you want to send me your motor I will look at it and run it and see what I can get out of it.

The new LSN just creeps out of the spray bar at WOT. That's to do with the change in taper. It's not quite as long and sharp pointed as the original. This is what gives the wider tuning window, as the very top end is now controlled more by the HSN than the LSN (should help with the lean bog below half a tank if mis-tuned too).
Re-set both needles to flush and start again. A nice race tune should be achievable with only slight adjustments on top and bottom from there .

If your problems still persist I would see if you can get another GXII carby. It is possible you have a faulty carb body or something. The boot filling up certainly doesn't sound right.

Thanks Puddin, but I went out and took out the metal long lsn and put in the old style long lsn. Then I set it at 1.5 turns in like my gxr engines. Heated it /started right up/reset idle/drove it and readjusted both hsn-lsn maybe 1-3 hours,readjusted idle down. No more rev up when coming to a stop,no blubbery top end-just praise the lord don't hit anything power!!!!!!!!!!!
Had power from top to bottom,from full tank to empty no funny revs, burps, farts or pops!! Me so happy! Is this how it was suppose to run after a 1/2 gallon? I have a little over a gallon with a break in shim. I thought I had some power when I switched carbs with the short lsn. That was nothing and I'm running rich!!
Yea,Trey already said to send carb back. Engine is going no where!!!!!!!!

if you start back where you started having problems and posting, i think you may be takeing it apart to many times, if its not broke dont try to fix it. one day you like it, next day you dont...LMAO....and now you like it agian i took mine right out of the box, made sure everything was tight, bolted it in and runs perfect so far after 1 gallon, havent switched rod, still no play. not broke, so not going to fix

Didn't know you owned a GO-HOII. Never said I didn't like the engine just trying to get to the problem. As to what you said, yes it should have been put in fired up no problems. My gxr 3port did. But if it won't run correctly need to know why. Really doesn't matter any more.

hi ruune, i myself have actually got some tests done on whether these taiwan engines are actually made from different material.tests completed 2/5/10
i bought a Go-engines GX3R & Alpha s852(orange head)

head button, piston,(not piston pin) sleeve, crank case, cooling head, crank shaft(not including the TiNi coating) ARE ALL THE SAME MATERIAL,

The design and so forth are different. piston pins are made from two different types of alloy, the bushes within the conrods. bearings are different, o-rings are different within the carburetor.

so next time ruune, conduct some tests of your own to back your theory, of course you being a part of "GO engines" your going to say they are different and back them as much as possible, but when it comes down to what they are made out of, PROVE they are different before you go and make assumtions that someone is wrong and in this case 808gx7r is RIGHT "only to the extent of the main things such as case, sleeve etc."

so in my eyes you should be saying sorry to 808gx7r. and since he runs both and saying about runtime/tuning/life span, he should atleast have a idea of the concept of material being the same.

however, from his point in view, being as he uses them both if he is somehow wrong, its not his fult due to the fact he runs both and says that runtime/tuning/life span are similar.

and for anyone else's info, i run a GX5R(and i love it!!) as my main motor and have a brand new alpha ready to be broken in.

~ Corey douglas, owner of RCExtreme hobby store.

your not located in winter haven florida are you??

I agree on not taking it apart. I asked Adam about his nova motors being bolted. He said there is never a reason to take apart a motor unless you rebuild it or its not working right and most of the times its something other than the internals. Some people think i over do some of the stuff but Lopez is a good example of hard head and when he finally listen to me his motors have been flawless.that little 30 minutes of prep or less and my break in style I never have motor problems. I have noticed The more big races I go to the more the big names pro's have noticed my motors..... I have some Gx2's at a gooooooooood price hit me up in msg if intrested