Wait a sec, put the symptoms in more detail and your setup too. Popping on shut throttle isn't any indication of lean or rich. If you close the throttle @ say 8K rpm, guess what, you're running 8K rpm but feeding it gas via the air screw. Remember jetting depends on throttle position, not rpm. You crank WFO @ 2K, you're feeding it gas via main jets, needle and pilot and air screw, all of those ... OK in a cv carb its not that instantaneous, cos the diaphragm has to lift, but you're going to slowly start using the needles and the mains ... but by the time you get to 4-5K rpm you're definetly on the mains.
However shutting the throttle instantly cuts off fuel from anywhere but the air screw, and the slide drops a fraction of a second later. Definetly can pop even if jetted perfect.
Cool.
Buddha.

Ok, I'll have to pull the plugs and check it out.  I'm pretty sure my bowl emptying issue on the highway has been resolved by removing the fuel filter and putting new lines on because I did a 25 mile ride yesterday in the ON position instead of prime.  Rode highway at 55-80 and no problems as well as back roads.  My carb setup is 145 mains, stock pilots, 2 washers, 2 turns out.  Mods on the bike are K&N and full V&H exhaust.  Thanks Buddha, I was worried about the popping after I close the throttle being a lean issue because it does it at all speeds.  It actually pops like crazy every time I let off the gas, no matter the RPM.  I was going to move up to the 150 mains but if it's jetted ok now I will leave it.  Just ordered new tires, will post pics of my bike soon, can't wait for some more warm days! Let me know what your thoughts are..
-Mike

Quote from: theboy3443 on February 28, 2011, 11:10:21 AM
Ok, I'll have to pull the plugs and check it out.  I'm pretty sure my bowl emptying issue on the highway has been resolved by removing the fuel filter and putting new lines on because I did a 25 mile ride yesterday in the ON position instead of prime.  Rode highway at 55-80 and no problems as well as back roads.  My carb setup is 145 mains, stock pilots, 2 washers, 2 turns out.  Mods on the bike are K&N and full V&H exhaust.  Thanks Buddha, I was worried about the popping after I close the throttle being a lean issue because it does it at all speeds.  It actually pops like crazy every time I let off the gas, no matter the RPM.  I was going to move up to the 150 mains but if it's jetted ok now I will leave it.  Just ordered new tires, will post pics of my bike soon, can't wait for some more warm days! Let me know what your thoughts are..
-Mike

You do need to put 150's in it, the other thing is - check floats and make sure they are right. K&N and pipe definetly need 150.
Cool.
Buddha.

Will do.  Thanks