Powerband too short

[Gage]

Okay so I put a new top end on a K5 89-04 mismatched years used Millennium Tech re-plated 88MM, brand new 39mm Keihin PWK 165 main 58 slow 3rd clip from top air 1.5 live in Ocala FL, New Gnarly Desert Pipe, Nature friendly muffler, New boyesen reed cage/ intake, passed air and vacuum tests, idles good, revs good, sounds good, runs okay down low but doesn't seem to have much hit to it. Up high it kinda just skips over its power-band in 4th, 5th. Black oil running out the muffler. Ive been having trouble with for a little while now. Tried a lot of different things nothing seems to change it. I 95% sure I put the PV in right, the side lever pulls when I rev it. I read some where on here that the boyesen reeds are more for low, did I mess up pairing it with the desert exhaust? I'm out of ideas, suggestions?   

[81cr450]

an easy check on the valves being in correct is to pull the pipe & manually operate them while looking up the exhaust, not running of course. move the 10mm nut, with a box end wrench ,where the output comes out of the clutch cover

what oil & ratio you using?

[Gage]

32:1

[Gage]

https://www.youtube.com/watch?v=wL5FVRbTygk&feature=youtu.be https://www.youtube.com/watch?v=_GWhs0-p7vg&feature=youtu.be Posted 2 videos of them opening I think they're right.

[81cr450]

Yup they're right

[Gage]

Rear wheel bearings maybe?

[Foxx4Beaver]

Black oil running out the muffler.

work on your jetting....too lean on top,too fat down low.

[Gage]

Okay so what bigger main and what else?

[Foxx4Beaver]

you gotta let us know what kind of riding you do....trails,track,desert...ect....can't just throw numbers out there without knowing if you're doing mostly 1/2 to full throttle riding or hardly ever at WOT.
But if you have black oil running outa the silencer/exhaust....you're way too rich somewhere...and I'll put my money on the low end.

[Gage]

Man I just take it around block lol  I meant to say whats the best way of leaning out the bottom end? Slow jet? Air screw? It surges 6-7 times after WOT in 4th 5th with the clutch in too.

[Foxx4Beaver]

that surging is a good indicator that you are too lean on top...go to at least a 170main.
drop your pilot down to a 55,you might even have to go down to a 52pilot.
and you can try changing the clip to the 2nd from top position....that may make it too lean for your riding style,so pay close attention to how it runs,you might have to go back to the 3rd position...it should be a lot more crisp in the 2nd from top.
this will also help your black oil problem go away.

[Gage]

Alright thanks I appreciate the help I'll give it try.

[Foxx4Beaver]

another thing you can try for the surging...is adjust the idle screw so that it WON'T idle....I learned this off this site a while back because mine used to surge like mad.....it didn't completely stop the surging,but it made a huge difference.

[Gage]

another thing you can try for the surging...is adjust the idle screw so that it WON'T idle....I learned this off this site a while back because mine used to surge like mad.....it didn't completely stop the surging,but it made a huge difference.

Leave the air screw alone after right?

[Foxx4Beaver]

yes,once you have it set.