Hi Im having trouble with a dna 50 , and many of you have this problem to ,
the problem is it wont move once i sit on it , or it will go for a few minutes then it wont pull away with me on it ,and only revs up to 5000rpm

ive changed everything , the only thing I havent changed is the CDI unit which is next on my list ,

your suggestions please

jase, April 2008

have you added a sport air filter. If you have remove it or change the jetting. I had this problem where either to much air was gettin in or not enuf. I revved and it would move abit, then bog down and flood. In the end i ended up removin the sport air filter. Hope this helps

dec2365336, June 2008

your automatic choke unit is fualty take it off and blank the hole with a 5p

Thomas, June 2008

the needle position was wrong , fixed that , so now idle speed is better

but if I throttle hard it cuts out , n hisses from the exhaust
if i gently accelerate its better , no matter how I adjust the
mixture , its hit or miss whether it gets me there

jase, April 2008

I think its going to be more of a carburetor set up problem

the exhaust is not blocked , though it has been getting very hot under the current carb setting

any one know how to set up a dellorto slide carburetor

jason, April 2008

the exhaust will be blocked up ty loosening it where it bolts to the barrel and see if it maks it better,this isnt a cure of course just a test to see if its the problem for sure,i would clean out the exhaust with caustic soda or cut it open take out the blocked baffles and weld it back together.

adam actual motorcycle mechanic since 1982, April 2008