Hyper ST Tuning Probs ????

[Dodgywheel]

I'm hoping some of you guru's can help me with this, i have a Hyper st truggy which i have broken in following the manufacturers instructions as closely as i possibly can, but seem to have some problems, when i open the throttle it stalls at about 50% open , i have tried following the manufacturers instructions, lean the high speed or richen the low speed and change the glow plug but don't seem to be able to affect the stalling, i have now reset my rig back to factory settings and it's still the same. Can some of you experts tell this newbie to nitro where he's going wrong and how you'd go about tuning to resolve this problem, which to adjust 1st etc, any help gratefully recieved.

 

[Scrogg]

Does it sound like it is flooding when you get past 1/4 throttle? If so keep leaning the HSN until it goes away.
If it accelerates good then stalls and/or idles high whenever you get past 1/2 throttle it is too lean on the HSN.
Check the fuel tubing and gas tank for leaks. Also check the carb, and exhaust for leaks.
A tiny pinhole in any of these places will allow the engine to pull in more air than necessary. It will stall because it starves itself right out of fuel.

 

[Dodgywheel]

Thanks, will have another look at it this weekend.