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really sluggish performance!!!!?

my aprilia rs 125cc sets off really slow and wont rev up to 6000rpm smoothly,ive got to pull clutch in and rev it up to 10000rpm and drag clutch to set off!! could anybody please HELP!!!!!
paul, April 2008
dirty carb

col, August 2010
sounds like the exhaust pipe is blocked with burnt 2 stroke oil try some caustic soda in it

adam actual motorcycle mechanic since 1982, April 2008
link Click here to see other fixes for Aprilia.