Engine Tuning for standard Kyosho GX-21 engine

[Johnnywalkeraus]

where can i find information on tuning or settings for the standard Kyosho GX-21 engine. it is used on the kyosho MP 7.5 Sports buggy.

the engine runs but occasionally it will stall when i release the throttle from full to idle. once it stalls it takes a number of pulls to get it started again. the car has only been run 10 times.


thanks for your help

 

[GaInGrEEn]

The idle pins on these vibrates out. Use your radio to trim it out a lil. What I did. My engine is tuned to the max. Only problem I have is once I run about 10 min it get so hot it starts bogging out once I come of the throttle. Engine is goodfor 8 min then I suggest cooling it off. I have to remove the glow plug and let it sit for about 15 min before it will start and run right again. I am switching OS-VB engine tommorow tho. Maybe if I put a cooler head on it. Who knows. GX is fast tho, just no take off and overheats.

 

[robriguez]

I've run about a 1.5 gallons through my gx-21 so far and the only thing I've had problems with are the o rings in the needle valves. Once I replaced them it held a tune fine. Mine still starts on the 2-3 pull after priming. Current setting are 2 turns out on HSN and 1/8 turn IN from flush on the LSN. Runs good but I definitly want more power.

 

[El Pirata]

I haven't had any problems with mind holding a tune nor an idle.