69.5 wont run ,carb problem?

Hello friends ,i have a question that needs a answer. The orange 69.5 i traded a Norco road bike for seems to not be running like it did two months ago ,it doesnt want to run at all,it blows black out the tail pipe when im trying to start it ,it will run for 5 sec blowing black ,could the carb be shot ,any ideas .Im heading down to my shop now to work on my 71 grabber race car ,my new-used winch i just bought for the trailer and ill try messin around with the 69.5 carb problm i believe . Ill check for any ideas in 4 or 5 hours . cheers James

 

Disconect the fuel line from the fuel pump,, and plug it,, Start the car Your prob going to find out the float is sticking and your flooding out,, If that is the case,, remove the carb from the engine and take the top off the carb and spray Gum out carb and choke spray into the float bowl,, That should clean all the tarnish out and put carb back together and install on the engine and hook up the fuel line and give it a wurl,,:Handshake

 

OK,after looking over things on this carb and pulling it off ,it looks like there is a broken pipe about 1/4 inch that goes from the exhaust manifold to i believe is a electric choke,its boken rite where it goes into the manifold. Is this the problem for not running and the black smoke ,can i fix this with some liquid weld?,the two part stuff you mix together ?

 

bump ,i need a few more responces befor i put the time in on this. cheers James

 

That tube helps the choke open as the motor heats up. Most liquid weld only lasts to certain temperatures so they burn up and fall off, actually PaulS has a good fix for them. Get ahold of him and he can tell you exactly how to do it it involves drilling the old tube out. I always put headers on and they no longer use the choke tube.
Check your choke it should be open at least a crack (in summertime temperatures) to allow air in so it does not flood out . If your choke isn't opening far enough it will kill your motor, also pull your spark plugs out and see if you are getting too much fuel, also check your cap and rotor, if your plugs are wet you are either flooding your motor or you are not getting adequate spark.