Re: 1200 miles, yes 1200 miles 82 750F SS- NO IDLE

Posted by tommyman on Aug 07, 2008; 4:50pm
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/1200-miles-yes-1200-miles-82-750F-SS-NO-IDLE-tp458050p458056.html

OK, Carbs out- easy as pie.  Remove float bowls, all carbs getting gas, and blow thru gas line comes out all 4 float valves.  GOOD>  Put carbs back on temporarily, and fire up bike- better, sounds like I have idle for 3 whole seconds then die.  I see the carb piston valves hopping up and down like rabbits, but I dont see gas vaporizing (venturi) in the throats....  I suspect needle valves- so next step is to back those out and clean out passage.  EVEYTHING is CLEAN and coming apart very easy, but I suspect a bit of guk is all it takes to clog a jet.  WHen I twist the throttle, I am evidfently 'priming' the carb with the valve adjacent to the #3carb and that is what she's running on.  SHes not sucking gas up from the bowls into the carb body as I can see.

SHOULD THE TANK BE FULL?  I have 1/2 tank now- does gravity help or is the carb piston literally 'sucking' fuel into the bowls/venturi for combustion?  that little cast aluminum valve at end of fuel line above fuel lines appears to be a one-way valve- if I puff air through it, it comes out through all 4 float valves with a short burst then pinches shut (I assume working correctly).  I am NOT putting compressed air through it, just mouth pressure at fuel line...