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please help me gilera dna 50 lack of power ?

my son has a 50 dna 2008 when on the stand power and revs ok but as soon as u take of stand to go there is no power to even move the bike
dean, October 2009
well from what you say im guessing you have a race pipe on it?am i right if so then the probelm is the rollers are too heavy in the variator change them to 5gram rollers and you will have a rocket ship.its a very common thing i see it all the time

adam bike doctor, October 2009
Take the carburettor off and give it a good clean. Check the air filter too.

John, October 2009
link Click here to see other fixes for Gilera DNA.