4 cycle idle

[PaulC]

Is it bad to run the buggy if the idle sounds like it's 4 cycling?

Apart from this my tuning seems fine. Might be a little rich, but it seems everytime I get it close the idle sounds different. Stable but I'm fairly sure it's 4 cycling.

Paul

 

[MotoGod]

If it's 4 cycling, your LSN is probably super rich. If your tune seems OK, what I would do is richen the HSN, and lean the LSN to try to get it idle normally. 4 cycle idle typically means your HSN is too lean and your LSN is overly rich to compensate for it and keep it running.

Here is a GREAT tuning Bible to read by Ron Paris
http://www.rctech.net/forum/nitro-off-road/295490-tuning-bible.html

 

[Mickstix]

Anybody got a video with "sound" of a nitro engine 4 cycling? I've read about it, but not sure I've ever actually heard one do it.. I thought mine was, but apparently it was just idling too high.. lol.. But if anyone has a vid of one doing it, I'd appreciate it! Thanks!
OH, and sorry for the thread hi-jack..