I just looked at my oringinal post on this and I've been chasing this problem for a YEAR! Last night I finally solved it!
I bolted on a new carb and basically had worse results than the original carb. Something is screwy...I happened to read the carb tuning tips on G-forcepowersports web site and "air leak" kept jumping out at me (i've read it all b4 too!) Anyhow, last night i took a real good look at where the carb bolts to the metal intake tube and you could visually see a tiny gap! son of a...... Mixed up a little 5min epoxy (cause I never want to take it apart again) and walla!!! Fired right up and could actually tune it and have it idle really nice and low like a good Honda Clone should. Knock on wood this might be the best running bike I own ....lol...
hope this helps someone else
happy wrenching
rob
06 TLD Predator 500 - lots of mods
03 Predator 500 - stock
04 Blaster - bored over
08 DRR 90 - mostly stock
07 Polaris Sportsman 90 - stock
01 Suzuki LT80 - stock
04 China Quad 50cc
06 TTR90 - stock
Thanks to SMS for keeping us running!!