Quote:
Originally Posted by justin1328
Quad was bogging out 1/4 - 3/4 throttle.
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There's the key. Here's a brief summary:
- The slow jet is the basis for idle
- The pilot mixture screw is responsible for the transition from the slow jet to the main circuit. If the pilot mixture screw requires more than two turns out, the slow jet is too small. Ideal adjustment is found when you have a smooth throttle from idle.
- The jet needle in the slide is responsible for mid-range. As you open the throttle, the needle jet (directly above the main jet) is slowly uncovered by the tapered jet needle. Raising or lowering the jet needle affects how quickly or slowly the main jet comes on fully.
- When you're at WOT, it's all main jet in theory. The rest of the story is that the slow jet is still contributing fuel, but that's not important here.
If you move the clip up on the jet needle, you'll lift the slide later, which delays the onset of the main jet (that leans out the mid-range). Move the clip only one groove, reassemble and test; does it get better or worse?