4 stroking

[Chiron TL-34]

I recently installed an mz65 knockoff tune pipe and noticed crazy 4 stroking in top end RPM's. Does anyone know what I can do to fix this?

 

[Whitewill1412]

Probably need to rejet the carb

 

[Chiron TL-34]

Probably need to rejet the carb

Leaner?

 

[Whitewill1412]

Leaner?

Yeah

 

[ImpulseRocket]

It's not unusual for the jetting with a pipe to go a step leaner, especially if you are already tuned on the rich side. The pipe is doing it's job of forcing unburned fuel that went into the exhaust back into the cylinder.

The real question isn't the rpm, but the throttle position. If it happens at 3/4 throttle or more, main jet. 1/4 to 3/4, needle.

 

[DAMIEN1307]

If it happens at 3/4 throttle or more, main jet.

Translation, you need to go to a smaller, leaner main jet in your particular case.

 

[ImpulseRocket]

Translation, you need to go to a smaller, leaner main jet in your particular case.

I always seem to need a translator

 

[DAMIEN1307]

I always seem to need a translator

So thats what your wife has been telling you...lol...lol.

 

[Wrench]

I asked my wife what the difference between 6" and 12" was
She said Ooowe and Aaahhh

 

[DAMIEN1307]

And I thought I was the sick puppy with the warped jokes here...lol.