bike runs bad above 6000 rpm, advice required, new to xz550

[matrixa850]

ok, need a bit of advice here so that i dont spend time and money where i dont need it.

My bike is a Eu xz550, 19k miles, been stood up for a while.

The bike starts and idles lovely, plus well when riding until you get to around 600 rpm then it feels like its running out of gas. If you drop down a gear and it goes above 7500 - 8000 rpm it will then climb to the limit allbeit roughly. I think the carbs may need cleaning and the contacts may need a clean. What do you guys think. New to this bike so would appreciate your input. As i said it runs lovely below 6000 rpm.

[Night Vision]

any vision that has been sitting around for awhile should be treated to a good carb cleaning...

I just started on set off an '82 tonite.... the varnish and gum is so thick, I think I'll have to dip them just to get some of the jets out.. but i think the carbs sat for ten years?

if it's running ok below 6k, first I'd run some seafoam or techtron in the gas, do an Italian tuneup  ;) , and see if it gets better..

then.... may just have to check the sync and adjust the pilot screws....
.....or do a quickie disassemble and spray job...
.....or a disassemble and dip job
.....or the full blown dip and rebuild

[QBS]

FYI:  Vs' don't have ignition contact points.  Transister Controlled Ignition instead.  You've probably got gummed up secondary carb circuits.  Run a major load of carb cleaner through about half a tank of gas and hope for the best.  Also, remove the main jet access brass covers from the float bowls, clean the main jets behind them with a bristle from a wire brush and then spray carb cleaner through them with the little red tube that come with most carb cleaner products.  Berrymans ChemTool comes highly recommended.  Cheers.

[YellowJacket!]

Good advice above.  Always a MUST with any Vision that has sat for a while.  I would also check your vacuum lines.  If your bike still has a YICS (silver triangle box on left side) check it for leaks.  Leaky YICS = unstable idle and crappy running Vision.  Been there, done that. ;D

Oh, and welcome to the family!

David

[Tiger]

The bike starts and idles lovely, plus well when riding until you get to around 600 rpm then it feels like its running out of gas.

:)...SYNC' THE CARB'S, YOU HAVE VISION STUMBLE, OLD BOY... ;)

[Night Vision]

The bike starts and idles lovely, plus well when riding until you get to around 600 rpm then it feels like its running out of gas.

:)...SYNC' THE CARB'S, YOU HAVE VISION STUMBLE, OLD BOY... ;)

or........... maybe it's one of those Euro 37kw models that just aren't supposed to get to the sweet spot :o

wouldn't that be a bitch  >:(   nah, couldn't be.... clean them carbs!!