56nomad
XS650 Enthusiast
i'm running the 40/140/#4 clip jjj (too rich, getting breakup on the crossover between the pilot and needle transition) but i can tune that out.
Sorry but I probably caused some confusion with that baseline set up. Being too clever, I was thinking about saving you some work by just leaving your main jets at #140 you had fitted. Unfortunately I then instantly forgot that and married the bigger jet up with the JJJ needle in groove #5 that I had with my #138 mains. So yes, I reckon you could experience richness further up the scale with a 140 and JJJ#5 main circuit set up.
This is what I had after I had after I had got rid of the hanging idle:
Float level: 0.5mm - 1.0mm above the gasket line
Pilot: 40
Mixture screws: 2 1/4 turns out initially
Main jet: 138
Needle: JJJ on #5
Sync'd
With the hanging eliminated I was most content over quite a few more happy miles ridden both open road and urban. But once I'd got used to it I then began to detect a small bog at town speeds at the off idle/idle/off idle transition (y'know, throttle on/throttle off/throttle on). Nothing to pee me off big style but there all the same. So I'm currently messing about with needles to improve performance off, above and way beyond idle so I may be able to help you further .......... when you can get out after the snow over there has melted!
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