This page is still under construction. Photos will be added soon.

I thought I would put a little list together on de-restricting the stock Super 9 to it's full potential.

Change the drive boss for one without the shoulder on it.

Change the CDI. You can either re-wire the stock harness and use the old-style CDI, or you can go the much easier and less expensive route and use a performance GY6 CDI: http://www.partsforscooters.com/169-27-Performance-CDI Special thanks to Chaz from the Kymcoforum for the link to the GY6 CDI. Before I knew about this, I was re-wiring and using the old style CDI from the LC Super 9.

The exhaust can be changed for older style exhaust, or performance exhaust (Tecnigas, Leovince, or Turbokit). Tecnigas preferred over the other two. You can also cut the expansion tubes off of the old exhaust and weld back over the holes, but it's an awful lot of work. Most people prefer to simply exchange the exhaust for another.

A stock air cooled Super 9 exhaust. Notice the tubes up near the header.

A close-up of the “restrictor tubes”. The bottom one (big one) is just to disrupt air flow by allowing the exhaust gasses to expand into the tube instead of down and out of the exhaust pipe. The upper tube is supposed to be part of Kymco's catalyst system which supposedly introduces fresh air into the pipe in order to allow more complete burning of the gasses coming out of the cylinder. Sounds like snake oil to me. If I can find the diagram that Kymco has for this exhaust, I'll post it up too. The 4-stroke one is posted below.

This is the 4-stroke diagram, but the theory is basically the same as far as the catalyst system goes.

The carburetor must be re-jetted. Minimum of jet size 83 with the stock air box. I recommend doing plug chops to verify that the jetting is correct. Do not skip jetting... the engine will run lean otherwise. You may find that a richer jet will be required (I've heard of people using low 90's with the stock airbox, depending on setup). I had a link showing the process of drilling jets, but can't find it. I'll add it later.

That should get your air-cooled Super 9 running good,! From here, if you want more speed you'll have to look into some aftermarket parts. I prefer Moped Hospital for all things Kymco performance. The Airsal cylinder, RS-II exhaust, and an aftermarket carburetor. You can use either the Dellorto 19 or the Arreche. If you want to go a little bit of a different route you can get the 28mm manifold with a Keihin (or less expensive copy, OKO, Koso, etc) 24-28mm.

If I can answer any questions on the above, please let me know. I'm pretty busy and can't always respond or get back immediately, but I'll try and help you out if I can.