hi guys, nice forum!!!...first post...be easy on a newb...lol...

well, my problem is, well, i'll give a little background first....had a 300 ex a long time ago, traded it in with a jet ski for a newer gp1200r, got into buying and selling motorcycles and low and behold i got a couple quads as trades on a gixxer750.....so now i have a 440 ex that hits strong as i've ever seen cam, big bore, sparks exhaust, supposedly some head and carb work, triple rate front reservior shocks etc....and this banshee...that supposedly had a new top end (just like every other two stroke for sale...lol...) and was just finished 0 hour, before i traded for it...well, whenever i went to test ride it he told me that the bike just falls on it's face really bad whenever you come off of idle and never picks up...and he was right..it idled fine, but wouldn't do much of anything else...well, he said, " i think it might need to be rejetted, well, turns out that was part of the problem...it had no jets in it!!!!...so, i went to the toomey website, it suggested 270's for a t5 with filter and no lid....well, this was WAY too lean....hit idle to mid then just crapped out...soooo...went to 320's...well, this really helped...but still not great..so, i checked to see if the carbs were in sync..they were a little out...got that fixed...got it idling right....the air screw are about 2.5 turns out from full in, needles are on 4th notch from top...320 jets....the only thing i haven't checked is the float bowl setting which seems like it might be my problem or maybe it's jets??? That's my question...it's pretty bad off idle, maybe i'm just expecting too much....then all of a sudden it will pick up..and in first it will lift the front wheels a bit, but then kinda gives out on the top end??? i've ridden a banshee with around the same mods except for it had a cool head and boost bottle..it was alot faster, picked up the front end in at least the first three gears...compared, the one i've got is acting weak....what do you guys think it is??? plugs really don't have too much color to them yet...one side seems kinda clean, too clean....white base...black electrode..the other has a black base (porcelian (sp?)) with a black electrode....i checked the cylinders and the exhaust with a pyrometer and they seem to be within acceptable numbers, within a few degrees of each other at idle....so what do you all think???
thanks,
-matt

 

What position is the jet needle in? The jet needle controls mixture from approximately 1/4 to 3/4 throttle... There are 5 clip positions.... You might want to check this....

 

What air filter setup are you running?

 

4th down, and k&n with prefilter

 

Sounds like you are a little rich... Try raising the clip(lower the needle).... 320 mains sound a little big.... If lowering the needle helps, then I would drop the mains down to 300 or 310.... Are you still running the stock #25 pilot jets???

 

yup, pretty sure...oh, and what should the bowls be set at??? i may ride it some this afternoon to see if i can get a good reading on the plugs, take pics and post back up...

 

With or without airbox lid?

 

If you are running the stock VM26SS mikuni round slide... The float height should be (20-22 mm) or (0.80-0.88 in)

 

without airbox lid, and the more i think about it, the more i think it might either be too rich, or the floats may be running dry, because with the lid on it runs like pretty bad, ie. too rich...????
and 20-22mm is from the base of the body to the seam of the float or what???

 

Distance is from the float bowl mating surface (without gasket) to the top of the float