SOHC.co.uk Forums > SOHC Singles & Twins
CB200 carb issues
McCabe-Thiele (Ted):
Going back on topic what is your ownership history with this bike - have you ever had it run at say 8,500 rpm.
You have started much as I would have looking at air intake fueling & then sparking.
Are the coils on your CB 200 like my 400 with the leads as part of the coil.
My other thought making quite a few assumptions such as you have enough fuel flow into the carbs with the right jets etc - is what about the other end - could the exhuast system be blocked up?
Are you happy with the condensers as well as the coils ability to produce the sparks fast enough ?
Sesman:
--- Quote from: Oddjob on March 09, 2023, 02:05:41 PM ---We don't know, he died of boredom about 14 posts ago ;D ;D ;D ;D
--- End quote ---
😁😁😁😁😁
Sesman:
Yes, it’s sufficient time for it to ‘charge up’. Points problem, condenser problem anybody?
Johnwebley:
--- Quote from: McCabe-Thiele (Ted) on March 09, 2023, 04:27:13 PM ---Going back on topic what is your ownership history with this bike - have you ever had it run at say 8,500 rpm.
You have started much as I would have looking at air intake fueling & then sparking.
Are the coils on your CB 200 like my 400 with the leads as part of the coil.
My other thought making quite a few assumptions such as you have enough fuel flow into the carbs with the right jets etc - is what about the other end - could the exhuast system be blocked up?
Are you happy with the condensers as well as the coils ability to produce the sparks fast enough ?
--- End quote ---
when I first got it running,it ran up to the red line ok,
slight fluffing,but the air cleaners were original and caked with dirt.
it had a after market coil,smaller than standard,so only had a single mounting point,
since trying to put it back to standard,its had a coil from Wemoto,correct size,
new capacitor,original points,
it uses a single points,and Capacitor on a twin lobe cam
McCabe-Thiele (Ted):
With that updated information the coil change looks to be the part that caused the loss of rpm.
Sounds daft but first thing I would do is fit the old parts back on - if it returns to working the answer should be in the coil.
Assuming you have the same make & grade of spark plugs & caps. If you have fitted new plugs might be worth trying it with the old ones fitted.
Just me thinking out loud John sorry if it's obvious twaddle.
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