I went from 250F to EC300 to EC250 Race Ported Cylinder and Head.
Both make so much more power than the 250F. The 300 is more like a 250F off the bottom end, but blows it away in the top. The 250T likes to rev more, but has more hit and also makes just as much power as the 300 in the top end. After riding them all I'm enjoying the 250 2T as I can really hook into it without getting as beat up as punching the 300.
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