> I have a gp1 2001 and so far have been able to go on gps 65
> mph with many mods, is this about right with a metrakit sp
> pipe, 70 cc metrakit big bore kit, 19mm dell'orto carb?
That's about the max speed you will get with the 19mm carb and stock gearing. The 21mm carb will give you a little more top speed at 70mph. The 25mm carb does not seem to make much of a difference in performance. If you need more top speed, go with a gear change.--vh286
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