Dell'ortho 25 mm on pk 125 s

Schaltroller / Classic Motoscooters Vespa Smallframe
1

Hi

I am driving a PK 125 S standard.
I put a 25mm dell'orto onto it and a sito plus exhaust.
after the adjustment of the carb with a main jet 0,75 mm instead of an 1,02 mm and a needle D26 instead of D22, the motor accelerates great, but it doesn't reach top speed and if there are 2 persons on it, it loses half its power.

is there someone who can give me advice ?

thanks
Christian

2

 

Hi dude

 

For first i have to say that it´s hard to check what exactly the problem is.

 

If i´ve understood right the problem was born after mounting the new carb.

 

Please doublecheck if there´s any mounting fault. (false air etc.)

 

 

cheers