No rev limit CDI is made by universal parts. This is the one I used. With some plugs you may have to disconnect the wires from the plug and the new CDI and attach them to the old plug, although in my case I didn't. Someone else I know had to do that though.
I know it says for GY6 150cc 4 stroke engines, but they work fine on Kymco S9 air cooled also. Remember CDI the the only controls peak revs and advance and retard. The signal of when to spark comes from the magneto/stator, it is just advanced or retarded a little by the CDI. This CDI works perfectly. Spark Plug is biscuit brown and it revs to whatever your port timing will allow, which in the case of the Airsal T6 is in excess of 12000rpm. With an Airsal T6, Technigas pipe, Arreche 19mm with 90 main jet (comes with a 72 so make sure you order the bigger jet when you order the carb), 6 gram variator weights, and universal parts cdi and it will do in excess of 60mph and out accelerate a standard GY6 150cc scooter.
http://www.partsforscooters.com/169-27-Performance-CDIChaz
