hi took the old girl out today rides great until 7,000 revs then splutters till 7,500 revs then go's OK but still not right high in the revs but prefect low revs please can help me

Sh1t in carbs maybe worth a clean and spark plugs?? You been filling up at the normal gargae lately or tried somewhere on the fly?? Plugs or fuel is where I'd start looking... can't beat a bit of carb cleaner :) just make sure the fag is out 1st!!!

tryed carb cleaner that you pour it to you tank and no change how hard is it to clean the carbs not done one since i had a quad many years back thanks for your reply

When it gets to 7000 and starts spluttering does it rev cleanly if you close the throttle slightly ?

The fuel supply is coming from a combination of idle & main jet at those revs, most probably a float valve isnt working properly or your air filter is blocked. Take the carbs off & blast all passageways with carb cleaner with diaphragms removed, its especially necessary after the bikes been stood for a while and you didnt drain the float chambers