There is no need to change the cdi unit on the bike as it poses no form of restriction even to the revs, if changing it increases engine revs it would be stupid to do, it would only red line the bike and cause alot of engine wear fast, to the cylinder and crank. The main restriction on revs is the weight of the rollers and clutch contra spring. If you want more speed, change exhaust and jets/air filter to add bhp, and add a big bore kit, this way you can add more power but the bike will still rev the same, the power will give you better acceleration and power to overcome your weight and wind increasing top speed.
Steve, September 2006
