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Hi guys. right so I took everyone's advice and stuck with the original carb set up. Got them off and gave them a full clean got them back on and she now runs but when I let off the gas the revs stay really high for a few seconds before dropping down again and sometimes they stay at up around 3k ive checked that everything is moving freely and nothing is getting stuck so i can only assume is something to do with the setup any advice would be great
 

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Sounds like the throttle return cable is not connected, loose, or broken. I would start by checking the two cables that connect the handle bar throttle to the carbs.
 

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Could be a vacuum leak on the carb boots, between the carbs and the heads. Maybe try re-seating, check clamps.
 

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Might also take the rear boots loose, lift the slides by hand and see if they drop all the way back down with a bit of air resistance and woosh sound. If you had the diaphragms out, they may not be seated correctly under the top plate.
 

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Well, don't know much at all about carburetors. 48,000 mi. on mine never been worked on,except seafoam, i bought it @ 1,400 mi.
You're next! :)

I used to say that, then I slacked off on the seafoam and got a clogged pilot jet. seafoam-seafoam!
 

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Have you tried lubing the throttle cables?
 

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I'm not up to speed on your setup Juice, but is yours ear shaved at all? Stock jets and all stock intake/exhaust? To me it almost sounds like either a vacuum leak like previously mentioned or maybe running a little on the rich side causing the rpms to hang out. Did the air/fuel mixture screw get set back where it was? How many turns out?
 
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