Hello.
I am writing to you about some problems I have with my scooter.
Kymco super 8 4 stroke 72cc.
I hope you guys can help me out.
My scooter do not really reach high rpms when I give it full throttle, as you can hear in this sound clip
Which in turn limits my top speed..
I have removed the following restrictions:
Cut one of the small wires at the cdi box.
New sliding tube and new polini variator 4.5 gr.
In addition to a 72cc bbk I've also fitted a larger cylinder head with bigger valves. I have had to increase my main jet size, following the installation of the new bigger cylinder head. Right now I'm running with a 110 which I think is pretty high. I have also tried higher and lower main jets with no increase in performance. The rpm does not go up nor does the top speed.
I have thoroughly checked for leaks but found none.
The scooter starts immediately and keeps idle fine.
Timing is correct and valves are adjusted.
My setup:
72cc gy6
47mm cylinder head 21 in / 19 out
Performance camshaft
Polini variator 4,5 gr
Unifilter
Leovince exhaust
15% stronger torque spring
Stock carburator
