2000 Blaster - Carb Problem

[LoSeR]

you should check the jetting at WOT. do a plug test in that circuit. that means put the wheeler on the road in 2nd gear and hold the throttle all the way open. then hit the killswitch and pull in the clutch at the same time. don't let the engine pull the wheeler at all. then pull the plug and check for jetting condition. you will also need to check the plug after idle to check jetting at pilot.
also a compression check is highly recommended. if you've got some leakage in the rings, that could cause your white smoke. the reeds are another really likely culprit. if they're bend or cracked, they won't snap shut like they're supposed to and will not give the valving resistance necessary for engine control via the throttle.

That has nothing to do with idle. And the ring comment makes no sense at all. That only pertains to four strokes. Anyways, what is the difference in elevation between the two locations? Re jetting may be necessary. The rev hanging is usually due to a lean condition.
Try this sequence first; Turn your idle all the way down.Then start it and keep it running with the throttle. At the same time adjust your air screw until it feels like it's running it's smoothest. Now turn your Idle back up and see if you can get it to idle. If that doesn't work, pull off your carb and make sure the float is level if you haven't done that already. You can also check for a broken/ cracked reed at this time. I'm willing to bet that will cure or point out your problem.

 

[quam]

you're right about the rings only pertaining to 4strokes, sorry bout that one.
as for the jetting at wot, i should have been more clear; i wasn't suggesting that as a fix to his idling issue, just letting him know that before he starts changing his main jet sizes, he should check the jetting condition first w/ a plug test in that circuit.....
good eyeball though, man. glad you said something otherwise i might have created more confusion than help! i really like this forum and all the info in here, so i'm just trying to add to the heap of knowledge in here as much as i can for posterity's sake.....

 

[LoSeR]

you're right about the rings only pertaining to 4strokes, sorry bout that one.
as for the jetting at wot, i should have been more clear; i wasn't suggesting that as a fix to his idling issue, just letting him know that before he starts changing his main jet sizes, he should check the jetting condition first w/ a plug test in that circuit.....
good eyeball though, man. glad you said something otherwise i might have created more confusion than help! i really like this forum and all the info in here, so i'm just trying to add to the heap of knowledge in here as much as i can for posterity's sake.....

It's kewl.B-)

 

[piezzi]

Success!

Got my carb kit today in the mail and so I went thru the carb again tonight and also adjusted the float level. After reassembly and install.......my bike didn't want any choke and started right up. Adjusted the idle screw a 1/4 turn from it's original position and got a decent idle. It's late for the 'oldies' in my neighborhood, but I got on the throttle I little and it's not over reving anymore :-D Still have some smoke, but I'll fuss with it tomorrow to see if I can dial it in and get in a test ride. Feels good to have made some progress with this beast.....

Should I still turn the idle down, set my air screw, and then set my idle?

 

[trailripper1500]

the air screw should be 1.5 turns out. i don't think it really matters w/ the order of how you do it.

 

[piezzi]

I think 1.5 turns is suggested as a starting point for stock bikes, which I have, but each bike will be different and mine's running best w/ 2 turns. Starts right up w/o choke first kick, runs quick off the line with a strong push through the first half of its powerband, but the second half is mushy. Also still leaving a trail of white smoke.....it's not a ridiculous amount of smoke, but it's smoking.