ninjette.org - View Single Post - Horrible performance below 6K RPM, especially when warm. Video attached.

jkv45 · March 17th, 2021, 06:37 AM

As far as adjusting the idle mixture goes, that's not usually how I do it.

CV carbs are going to "bog" when you open them fast - no matter what. That’s especially true when not under load and with small displacement engines.

To adjust the idle mixture, first make sure the carbs are synced. Then warm the engine by riding a while.

Turn each adjustment screw to get the highest RPMs. After both are set at the max idle speed, I go out (richer) about 1/8 or so from there. Then adjust the hot idle speed to the correct RPM with the idle speed adjuster.

Going just slightly richer than the max RPM gives you a smoother transition as you open the throttle.

EDIT - Your Main Jet may still be too rich.

March 17th, 2021, 06:37 AM	#15
jkv45 Rev Limiter Name: Jay Location: WI Join Date: Jul 2013 Motorcycle(s): '06 SV650n, '00 Derbi GPR, '64 CA77 Dream 305, '70 CL450 Scrambler, numerous dirt bikes Posts: A lot. MOTM - Jun '18, Oct '16	As far as adjusting the idle mixture goes, that's not usually how I do it. CV carbs are going to "bog" when you open them fast - no matter what. That’s especially true when not under load and with small displacement engines. To adjust the idle mixture, first make sure the carbs are synced. Then warm the engine by riding a while. Turn each adjustment screw to get the highest RPMs. After both are set at the max idle speed, I go out (richer) about 1/8 or so from there. Then adjust the hot idle speed to the correct RPM with the idle speed adjuster. Going just slightly richer than the max RPM gives you a smoother transition as you open the throttle. EDIT - Your Main Jet may still be too rich. Last futzed with by jkv45; March 18th, 2021 at 06:45 AM.
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