The 125 is great when jetted right, even the old ones.
I came close to buying an MC125 with the intent of doing a 144. After a lot of research, I decided to pass on the plan as it was a hit or miss as far as satisfaction and reliability, and the price was steep even for a leftover. I still think the GG125 is a very under rated bike, its biggest problem is of course availability and price when compared to the Husky. I'm almost certain I'll move down in displacement next bike though, 250F, 200, or 125.