Yeah,,we need more info than that.
These engines do have what is known as a "wasted spark",,they do fire on every revolution.
I have heard of people having a similar problem as you describe because they had the wires from the CDI going to the wrong coils.
IF you have a CDI type bike,,the yellow wire from the CDI goes to the coil on the left side of the bike(Left as you sit on the bike),,and the pink wire goes to the right side coil.
These engines do have what is known as a "wasted spark",,they do fire on every revolution.
I have heard of people having a similar problem as you describe because they had the wires from the CDI going to the wrong coils.
IF you have a CDI type bike,,the yellow wire from the CDI goes to the coil on the left side of the bike(Left as you sit on the bike),,and the pink wire goes to the right side coil.
