LMAO.....never got it fixed!!!!! thats what i have! lol....hmmmmm....

buy a GX motor and you wont have that problem...Remember it is a 3 port so it doesnt have the top end that you MAY be trying to reach(thus creating a lean bog) have you tried running both needles super rich( not four stroke rich) but rich to see if it still does it even if you have crap for power lol....if it still does it then there IS a air leak some where!(I DONT CARE WHAT YOU SAY)...:nod:there is a leak somewhere if it does it with a SUPER rich setting;)

exactly!...i bet its the FRONT bearing is no good on that particular model and is giving an air leak just enough to get a lean bog when the tank doesnt have alot of pressure in it:nod:

only happens on low end, top end runs awsome!! i have replaced front bearing also:nod:, i have 513.00 into this engine!!! no air leak! everything is sealed and tested! aparantly there are a lot of guys having this problem with this engine, doing same thing! is there a recall on it? lol...?..lol...??????

WOW!:weird:..and you tried running FOUR STROKE RICH LOL..man i dont know what to tell you anymore except dont give up on the company just cause you got a OLDER motor that may or maynot have a recall on it!...lol....I DEFINENTLY GIVE YOU A 10 THUMBS UP FOR TRYING!..$513 DAMN LOL....I WOULD HAVE JUST BOUGHT A NEW 1 AND TOOK THE LOSS ON BUYING A USED ENGINE THAT SOMEONE TOLD YOU ONLY HAD 1 GALLON ON IT!....AND THERE ARE ALOT OF GUYS OUT THERE THAT CAN MAKE A OLD PISTON AND SLEEVE LOOK BRAND NEW!...AND THEN PINCH IT AND SELL IT SAYING IT ONLY HAS 1 GALLON ON IT!... check out RcRenew.com he is my buddy and does piston and sleeve pinches and RENEW'S the shine on a piston and rod for you!...just look at the website so you can see what can be done to an old piston to look new!....the seals on the carb PLAY A BIG PART IN THE TUNE!....so if you havent tried that yet then dont give up!...cause it will upset you when the $10 in orings fixes it...after youve thrown $513 at it already lol.....those seals are BAD! they had a tendency to break down without the USER knowing it!...thats why they were changed in the new models!

if i get them i will try!!! like i said, i havent heard from RUNNE since i gave him my mailing addy. my buggy at the track today has a GO .28 with 1 gallon- 1 tank on it and broke a rod today! will a go .21 5.5 rod fit a .28? if so, ill give him one! i have many!!!!!!!!!!!

YES THE ROD WILL FIT ALL MODELS!..21,25 AND 28....the reason why he snapped a rod is cause he DID NOT break it in right OR PRE HEAT it while it still has LOTS of pinch!....when a motor is new(regardles of the brand) you want to ALWAYS pre heat the engine before you run it because when fired cold you are just abusing the hell out of the rod,because the piston is still trying to form the sleeve!.....;)

ima learns ya, ye old GRASSHOPPER lol:lol:....just an inside joke!...we all learn something everyday with RC cars and NITRO engines...just cause you have ran nitro for 20 years DOES NOT make you a great tuner!...and im not trying to be mean im just stating the truth about people in general....ive had to show and tell COUNTLESS amounts of guys who have ran nitro for 20 years but have gone through 100 motors in those 20 years:lol::lol::lol::lol:

IM NOT SAYING THAT YOU ARE 1 OF THEM!...JUST SAYING WHAT I HAVE EXPERIENCED:nod:

deadmancourt, you know what, i will send it to you!!! if you cant get it to run right you send me a gx .21 5 port!! but dont give no excuses of why you cant get it right! you wont find the problen, trust me! it a manufactuar problem im sure!

I LIVE IN CALIFORNIA THOUGH!...IT WILL NEED TO BE RETUNED FOR YOUR AREA:nod: SOO THAT DEFEATS THE PURPOSE:mad:...IS THERE ANYBODY ELSE IN HERE THAT LIVES IN MICHIGAN?.....LIKE I SAID IT STILL IS A 50% CHANCE THAT THE ORINGS ARE THE PROB!...I WILL CALL TREY(RUUNE) TOMORROW AND GET THOSE SHIPPED TO YOU ASAP!...

if he shipped when i gave him my addy, i should have them tomorrow, but who knows, NOT ME.

it would be close though, you could see whats wrong and then he can re-tune it a little for his area ....

inferno13 , i know one thing, GOs do tune different than most engines, i usually play with the needles in practice when i get a different engine to see what it does, you might need to spend some time just messing with the needles. OR idk if this has been mentioned, but what plug are you running??

I WILL SEND YOU A PM WITH MY ADRESS!...AND IF HE DIDNT SHIP THE ORINGS YET I WILL JUST HAVE THEM SHIPPED TO ME AND I WILL PUT THEM ALL ON FOR YOU!...

NOPE. he was on his lid and was at WOT for 20 seconds. lol, alway trying to blame it on tuning....lol