Can u tell me where the bottom fitting for fuel or air connects to on the carb its leaking gas and dont know where it is supposed to connect 2 have no idea but am searching for a blueprint of it ,,,it is 2 stroke also 21 model older looking style
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sat up too long pull the carb bowl remove the jets clean and reinstall them pull your petcock off clean the screen put in good gas,and you should be set when you turn the gas on if the bowl vent leaks gas tap the carb bowl the float needle will find its seat and run
Without any real detail about year, filter type or where the oil actually is "in" the carb I will try to answer. Oil can come from a few sources. The first is the breather tubes from the engine. If there is excessive blow-by the pistons, oil will be drawn into the carb through these tubes. There are also rubber check valves on top of the heads that can harden and cause the same issue. The last one is excess oil from a oiled cotton style filter (K&N). Either way, while in the garage, remove the air cleaner but leave the breather tubes connected. Get the motor up to temp and watch the tubes while reving the motor. If you see a heavy oil mist from the tubes perform a leak down check on each cylinder to identify the problem area.
i take it its carb. after it warms up to operating temps does it stop the sputtering? thats just a HD CV carb doing what it does til hot. Im not talking a 2 min warm up and off u go im talking operating temps of 200 plus. Is the carb an S&S? Your going to have high rpms til the temp kicks it down if its injected
What u are describing is typical of a faulty ignition system, but could also be a fuel problem. I check by removing the aircleaner and rotating the throttle. If u see a nice spray of fuel, thats probably not the problem. Check for a spark at the plugs. I can explain how if you need me to. If you cant see a good spark, U have an electrical problem. I had a crank position sensor go bad on me. Dont do what I did (replaced the battery, ignition, and regulator as part of my diagnosis procedure)
It doesnt...could be a fuel problem, or even a vacuum leak. You dont say what year bike, but if its carberated, I'd check visually for a good gas stream/ check for **** in the tank...service the air cleaner as well. Check the fuel air mix and set the RPM's to 950-1000 at idle. If that doesnt do it, check the condition of all your fuel and vacuum hoses
Have not worked on an HD but my thoughts and additional guesses would be: 1. fuel contamination (water at bottom of tank); 2. primary pump (in my case it was inside the fuel tank & might not be present in your bike); 3. fuel lines & clamps to & from primary pump or to the carbs; 4. in line filters; 5. vacuum controlled fuel valve (oppose to the usual manual petcock) 6. if it were the MAP sensor, bike wouldn't even run a block away + idling would be rough; 7. by chance are you using a Power Commander?
Also your post "bike will start and run fine for a few blocks then die" indicates that indeed fuel got into the carbs before but not when running meaning the bike used what was inside the bowl and was not replenished. Alternately, the fuel flow to the carbs might not be sufficient and there is a leak or a blockage somewhere.
As said might not work for your bike but has come across some of the above on numerous occasions.