justin_o_guy2 wrote on 01/19/17 at 08:07:14:1/8th throttle? Only a few seconds, occasionally, and I'm off to another section of the bandwidth.
If I was twenty years younger I just might be fiddling with it,, and hunting for every clue that the jetting is not Perfect..
Bike runs good, and at typical cruise speeds, Twenty, school zone, thirty and forty and fifty, round town, the loop, and smooth on the road,I avoid the 75 MPH, i20.. cuz that's just almost wide open.
Usually, the low speed adj. screw affects about 1/4 of throttle, along with an ever-increasing influence of the jet needle, up to about 1/2 to 5/8 throttle, and then needle jet up to main jet which affects wide open.
One problem with "judging" the jetting problem, is that these C/V carbs don't have an exact equivalence between the physical throttle position, and the actual slide position, because the latter is changed by the vacuum, not actual physical throttle. Other things that could affect position would be air leaks (which also affect mixture) and vacuum of the engine itself - which is affected by engine wear (rings and compression) and other factors like blockage of intake system and even exhaust expelling.
Air flow through the throttle plate and the subsequent amount of vacuum created above the slide and diaphragm is what affects mostly the position of slide.
Having said all that, your thoughts are correct, in that generally low throttle position is almost the same as saying low slide position. To me, there should be NO surging due to lean mixtures anywhere in the throttle range. Re-jetting is the cure, hopefully.
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