guess i'll try to change my plug to an os p3,currently im using a nova medium plug c6tf. about air filter,i always use clean air filters on my engine.last week the engine rips on our local track without flame outs,no idle drops,no lean bogs,tuning errors whatsoever,maybe nova plugs do not lasts like the os plugs.

try the plug first but if the engine was ripping last week and now won't idle and you changed nothing give it a close once over for air leaks etc..these engines rarely need more than a tweak once set up properly so a sudden change is more likely to be something else.Mine was the nipples on the exhaust pressure line cooler had unscrewed..bugger to spot as it was only causing a tiny intermittent air leak.Nothing dramatic just motor not as snappy as it should be..fixed it and return of the rocketship

Try all the above and get rid of that Nova plug. I recall reading back on here somewhere people having problems with Nova plugs. The GO's just don't like them it appears. I can't personally comment on that as I have never used one. Go for OD 97T or OS P4 or P5

yep, medium range odonells or os are the go, a p3 is an os hot plug wich will hide a fat bottom end.

hey guys I was wondering if anyone can tell me what other manufacturers o ring I could use on my high speed needle on a GX_5R engine. I would also like to know where I could get Go parts and o rings aswell.
Any help is appreciated

Maybe I should get a few OS P3's, I can think of a few girls I know that could do with something to hide a fat bottom end

There are GO distributors in the US on this thread. I am sure one of them will pop up with contact details.
In the meantime use some fuel tubing for your needle O rings. It works a treat. Cut a slice of tubing 1mm wider then the O ring groove in the needle. Place the tubing in the groove with the excess towards the top (adjusting) end of the needle. Screw the needle slowly in and you will see the excess tubing being cut away by the needle housing. Srew in until needle is flush, then back the needle out again and remove any excess tubing that is still attached. Screw needle back in again and your ready to go. The tubing will last for ages, give a good seal, and the needles will be easy to adjust as the tubing doesn't go hard or flaky.
When you get some new O rings, get some of the new GO OR-0023 nitrile O rings from one of the GO dealers. These are the best option and will last very well.

hahahahahahaha

Ha ha It's even worse when you consider most fat bottom ends are also lean on top and have a wide gap !!!!!
Oops - did I say that

LMMFAO oh my sides are hurting.

I'll remember that one in future, next time I see those signs at the track I'll tell em you'v got an average woman tune.

its lean on top with a fat bottom end and a wide gap ! hehehe

Just make sure the love of their life isn't standing behind you when you say it

.... depending on who it is !!!!

FAAAT BOTTOMS mmmmmm

LOL am reading this while having a meal