Originally Posted by
spura
Grizz, again you was right
Removed hsn and blowed out some debris what I found+turned lsn almost 3in and hsn little more than .5 and got another engine
yesterday was great also I changed pressure pipe to about 24cm(before I had about 21cm).
The truggy was running very well,power all around, only now it sometimes flame out when you push throttle at very beginning, (let say after few meters) after you have been idling for longer on track.
Hey, thatīs great news Spura
With the take off thing - sounds like it is a little rich on the bottom end (LSN).
The crankcase will load up with fuel when the motor sits at idle for a little while. The richer the LSN the more it loads up. Then when you go to take off this excess fuel extinquishes the glow plug.
Even a well tuned motor will load up eventually and stall on take off.
Just lean the LSN a little at a time until it will idle cleanly at the same idle speed (no sudden drop in revs as it loads up) and will take off clean and fast after sittng for 10 - 15 seconds.
You can use the pinch test also - bring the buggy in after a short burst. Pinch the fuel line about 1 inch back from the carb fuel nipple.
What you are looking for with a good bottom end tune is for the revs to rise up only slightly (about 500rpm) and the motor to cut out between 4 - 5 seconds after you pinch the line off. This means the LSN is pretty much spot on.
If the motor does not increase in revs and just dies quickly - the LSN is too lean.
If the motor revs up quickly to a fairly high rate, and/or takes longer than 4 - 5 secs to die, then the LSN is too rich. Cheers
