Hi, all. I've been experiencing sooty plugs lately on my '79 Special. I've turned the idle mixture screws in an additional half-turn over stock (they're now only 3/4 turn from seated) with no difference.
I had these carbs rebuilt by the dealer and, aside from a sticking slide a few months back, they've been great. The bike idles smooth and has tons of power. The "choke" action works perfect and it always starts right up.
Sometimes, when I really lay on the gas, I can see a light hazy smoke behind me, yet I don't seem to be consuming oil.
The air filter was once saturated with oil/gas mixture (long story that ends with LOTS of gassy oil spewing through the crankcase breather assembly... almost 10 quarts of gas/oil in the case). Would oil saturation cause the filter to restrict airflow? This filter cost me a fortune (at the dealer). Can I clean it? With what?
When the carbs were rebuilt, the slides were replaced. Is it possible that the needles on the slides are not adjusted properly? Would that cause an overly rich mixture?
How can I tell what size my jets are? I have an extra bank of carbs from a '79 special, and it looks like the only marked jets on it are marked "180". That seems higher than the numbers I've seen mentioned here by quite a bit. These jets were on the airbox side of the carb.
Also, I only get about 25 mpg. I've got new bearings around and my brakes don't seem to be dragging, either, so I assume it's definitely a carb/gas mixture problem.
I had these carbs rebuilt by the dealer and, aside from a sticking slide a few months back, they've been great. The bike idles smooth and has tons of power. The "choke" action works perfect and it always starts right up.
Sometimes, when I really lay on the gas, I can see a light hazy smoke behind me, yet I don't seem to be consuming oil.
The air filter was once saturated with oil/gas mixture (long story that ends with LOTS of gassy oil spewing through the crankcase breather assembly... almost 10 quarts of gas/oil in the case). Would oil saturation cause the filter to restrict airflow? This filter cost me a fortune (at the dealer). Can I clean it? With what?
When the carbs were rebuilt, the slides were replaced. Is it possible that the needles on the slides are not adjusted properly? Would that cause an overly rich mixture?
How can I tell what size my jets are? I have an extra bank of carbs from a '79 special, and it looks like the only marked jets on it are marked "180". That seems higher than the numbers I've seen mentioned here by quite a bit. These jets were on the airbox side of the carb.
Also, I only get about 25 mpg. I've got new bearings around and my brakes don't seem to be dragging, either, so I assume it's definitely a carb/gas mixture problem.
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