clw,
I'm just starting to research the project now, but so far the top end swap appears easy with no machining neccessary(same 72mm stroke). I'm not sure about the transmission ratios, but the final drive ratio on the 300s is higher than the 250. I don't plan to change the trans ratios. I also suspect the powervalve governer spring is different, but I still have some work to do to be sure. If I do go ahead with the project, the plan is to use a stock EC300 cylinder, head, and powervalve, not bore my 250.
The KTM ergos (250/300) feel too "stretched out" for me. I'm only 5'8", and never felt right standing up on the KTM. The GG feels more compact, and steers very fast with less input. Its without a doubt the better choice for the smaller rider. I guess you could say it handles like a Jap bike with better stability. Good geometry. I talked to Rich Lafferty about this duing his riding school I attended. He is about my size and also loves the GG ergos.
Glenn
'00 GasGas XC250
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