Fred1956,
I have Boomhauer's/Nambotin's GG 275 from the 2007 North American WEC rounds and, to me, it bridges the gap between the 250 and the 300 right down the center. It's made from a 300 bottom end and a 250 topend (so I'm told as I've only had it a short time). Everyone who rides the bike here in Colorado wants it as they love the power and delivery. I'm big (235lbs) and here's my impression: Early in the ride I wish I had a little more power down low but halfway through the day I'm glad there is no more power. Like all GGs it runs like it will never stall, the gearing spacing with the power is perfect, and there is less vibration than my 300. It does rev a touch quicker than the 300 but it seems to have the same rev ceiling. There you go, if you have any questions, let me know!
Eric
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2018 GG 300 GP
2014 GG 300 Racing E
2002 ATK 605 Dual Sport
2003 KX/KDX 220 hybrid
2021 Kawasaki KRX 1000 Trail Edition
1974-86 Vintage Can Ams, SWMs, Puchs, etc.
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