PattyMcPatterson wrote:
Main jet tuning question:
Can anyone clarify a bit on what it means to "Rev out cleanly"?
I'm trying to find my main jet by revving through 3rd. I find that I'm gurgling most of the way there to above 3/4 throttle even on WOT.
However once my RPMs get up there, everything cleans up. And once I'm into the power band the scoot takes off and feels wonderful. Then I can wind up and down and it's got crazy pull.
Would you say that is or is not revving out clean?
If I drop the mj a few points I can rev all the way to WOT in 3rd without a gurgling. Would that be revving out clean instead?
Can anyone clarify a bit on what it means to "Rev out cleanly"?
I'm trying to find my main jet by revving through 3rd. I find that I'm gurgling most of the way there to above 3/4 throttle even on WOT.
However once my RPMs get up there, everything cleans up. And once I'm into the power band the scoot takes off and feels wonderful. Then I can wind up and down and it's got crazy pull.
Would you say that is or is not revving out clean?
If I drop the mj a few points I can rev all the way to WOT in 3rd without a gurgling. Would that be revving out clean instead?
Try doing the WOT testing in 2nd gear instead of 3rd. Max rpms in 2nd may be higher than max rpms in 3rd. In other words, jetting that revs out in 3rd may still be too rich at WOT in 2nd.
Without experiencing it in person, the "gurgling" you describe is ambiguous. Sounds a little like a lean bog, except that a smaller MJ would not make that go away.
Some questions that may aid us. Which scooter are you talking about? What is the current jetting? Have you made any changes to the gearing? How fast are you going (GPS only, speedometer is worthless for this) when you think you're revving out?
Edit: also, besides jetting, have you made any changes from the stock carburetor?