Banshee Idles Too High

[Yamaha]

To start I'm at 370 ft elevation around 70 degrees.

 

Around January I decided to rebuilt my top-end due to low compression, before the tear down it ran fine with toomey t5's,boost bottle,boyseen rad valve, no airbox lid and pro flow filter and adapter plate.

The only thing I did was new top-end .03 over, milled 20 thousandths off stock head, and removed airbox and put on pod filters, changed jets to a 340 main and left stock 25 pilot, would not start with the 25 unless chock was on even when warm, pulled them to put in some 30 pilots and realized the 25's were cloged up a little bit, went ahead and put in the 30 pilots and it now starts first kick every time but idles too high, tried lowering carb slides to lower the idle and nothing happened with them all the way down, also adjusted the air mixture screws in and out, the idle just gets faster when I turn them out, ran it down the road even though it was idling high just to see how it was going to run throughout the gears and it runs perfect other than the high idling, has lots of power and quik response all the way up.

Pulled the 30's out and put the 25's back in, after I cleaned them out, and it would start with them but bogges right when I hit the gas, have to hit it and release it over and over to get over the bog,this is with choke on, dies when I release choke, just runs like crap with the 25's basically, so I put the 30's back in to see if I could get it right with them.

 

Question is, could the 25 be too small and the 30 too big or what? I thing the 30 is perfect other than the high idle, what should I do, soon as I post this I am going to check for air leaks>

 

Thanks for any advice you can lay on me.

Edited October 6, 2006 by Yamaha

[Banshee4Drag]

30# pilot sounds BIG... i run 27.5 in a drag bike....But the high idle sounds like you have your slides in wrong carbs. Check and see if the slides are correct... really slides like you have them mixed up. Which would either Not idle or High idle...But would run almost strong otherwise

[Yamaha]

30# pilot sounds BIG... i run 27.5 in a drag bike....But the high idle sounds like you have your slides in wrong carbs. Check and see if the slides are correct... really slides like you have them mixed up. Which would either Not idle or High idle...But would run almost strong otherwise

 

Ok, figured it out, have the #30's in there along with 340 main and needle in stock location.

The problem was the tors unit on top of the carbs, when I got it the screws on top were stripped out to adjust the slide height or idle whatever, but they were striped out in the most open position so when I tried to adjust idle at the throttle with the cable it would just hit the tors switch inside the carb tops and would not go any lower due to the switch inside, so I just took the switch out of the carb tops and the slides dropped about another 1/8th of an inch and now I can adjust the idle and now my shee is a screamer again, thanks for your help.