It's good isn't it? 125's go down in price. Why not everyone buy a 125? You could easily wack a bigger motor in it for maximum performance. There was also some hot 125's made for the UK market where they were really popular due to licencing laws.
One option would be a CG110/125 with an XR200 motor. Bolts straight in, just have to grind a little of the frame away by the rear of the engine to allow for the kickstarter shaft mound in the casings.
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