463cc top speed 30mph???

It should def go much faster than 5500 rpm and 30mph. Sounds like the belt could be slipping, try taking it off and putting on a new one and see if she goes any better. good luck

Does it rev any higher with the track in the air? Try this... lift up the back end and open the throttle, when it gets to 5500 can you give it a shot of primer and see if it revs higher or dies out. What condition are the spark plugs? Pull them out and see if they are dry or wet.

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I think.... therefore I sled
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Two '94 Indy XLT SKS

Since it has sat for a while this could also be other problems. With the sled in the air can you pull the track through by hand? if not could be seized boggy bearings or possibly something in the chaincase not lubed. How about the jackshaft bearing. If it does pull through smoothly with a little effort it could be your clutch setup. may just need a good cleaning too.

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I think.... therefore I sled
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Two '94 Indy XLT SKS

thanks guy i haven't checked a whole lot with it yet, so i shall try these suggestions.
Anymore??

It's your clutch, stop what you are doing and get it serviced, I have had the same problem twice and each time it was the clutch.

He who loves not his country can love nothing

if it is none of these problems then possibly just maybe u could of messed up the throttle cable adjustmentwhile cleaning the carbs and maybe the slides on u'r carbs aren't opening all the way.....just an idea