Tressie
Member
Hi,
Just got my 48cc Happy Times running and have a quickie question about how poorly it runs.
Regardless of throttle position, while at low RPM my engine seems to run very rough and might even be firing only on every 2nd revolution. As speed increases it reaches a point where power increases markedly, and it starts to sound like it's firing more consistently.
My guess is that at low RPM I'm only getting enough fresh charge in the combustion chamber to ignite on every 2nd or so rev. It's maybe taking a couple of turns to exhaust enough spent charge and replace it with fresh mixture.
So how do I address this? Enriching the fuel air mixture by changing needle valve setting might help, but I'm worried this might mess-up my fuel consumption. Lengthening the induction column length sound a better means to tackle the problem, so I would be very interested to hear others experiences with this mod.
Thanks for any help or suggestions.
T
Just got my 48cc Happy Times running and have a quickie question about how poorly it runs.
Regardless of throttle position, while at low RPM my engine seems to run very rough and might even be firing only on every 2nd revolution. As speed increases it reaches a point where power increases markedly, and it starts to sound like it's firing more consistently.
My guess is that at low RPM I'm only getting enough fresh charge in the combustion chamber to ignite on every 2nd or so rev. It's maybe taking a couple of turns to exhaust enough spent charge and replace it with fresh mixture.
So how do I address this? Enriching the fuel air mixture by changing needle valve setting might help, but I'm worried this might mess-up my fuel consumption. Lengthening the induction column length sound a better means to tackle the problem, so I would be very interested to hear others experiences with this mod.
Thanks for any help or suggestions.
T