ninjette.org - View Single Post - Engine Feels Like It's Missing at Medium Speed. Any Ideas?

jkv45 · September 25th, 2017, 06:33 AM

A 112 Keihin Main Jet might be too rich. What do the plugs look like?

3 turns out on the idle mixture screws is unusual. Most of the time 2 to 2.5 is optimum.

I would move the clip on the needle 2 spots leaner (up) and see how it runs.

Another possibility is a damaged or misaligned carb diaphragm. Did you remove the idle mixture screws, clean the passages, and look at the condition of the o-rings before replacing the screws? Did you remove and clean the Pilot Jets?

What gas are you running? How old is it?

September 25th, 2017, 06:33 AM	#17
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	A 112 Keihin Main Jet might be too rich. What do the plugs look like? 3 turns out on the idle mixture screws is unusual. Most of the time 2 to 2.5 is optimum. I would move the clip on the needle 2 spots leaner (up) and see how it runs. Another possibility is a damaged or misaligned carb diaphragm. Did you remove the idle mixture screws, clean the passages, and look at the condition of the o-rings before replacing the screws? Did you remove and clean the Pilot Jets? What gas are you running? How old is it?