This engine is issue from the 250 on which the filter system has been restricted to meet noise standards that are more severe on a 125. The carburetor is same as on the 250 so widely big enough for the 125.
Our modification allows to optimize the filling by the modification of the air box.
The original paper filter will be replaces by two foam filters washable and the instructions you will explain in detail how to modify the cover of box a air in order to have the best possible performance.
We deliver you a main Jet and a new carburetor valve spring to make the carburation setting perfect.
You will receive also a front chain sprocket with a tooth less. This enable your engine to run 10% faster at the same speed and therefore it will increase the power.
The engine will not be on over rpm has its maximum speed because the stanard gear ratio is too much.
This engine with our amendment, will have performances evolve in a highly sensitive way both from the point of view of the couple as the speed of a cruise.
all our products are books pre-adjusted.
Warranty against hidden defects
list of components:
 
-a main Jet
-2x Uni Filter air filter foams
-a chain sprocket 13 teeth
-installation instructions explaining precisely all
ATTENTION : Acceleration progresses significantly which means that when you want to overtake at 70 km/h, you have a much greater acceleration. The maximum speed will be faster and more often reached.
reliability of this bike will be the same a. the standard
Attention, the modify to the technical characteristics of a vehicle caould be a lack of conformity may prohibit its use on public roads.