I'm down to a 170 before it would rev out with quick opened throttle, I suspect 168 would be better but I use top end so little in tight trails I don't care much. Results may vary with your gas.
What made the biggest difference was I was using a cat pipe that was gutted. I thought they would be the same and looked same from a rough measure. The original slightly flattened one really woke it up. Not the same.
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'07 EC300 GG
'14 TXT250 GG
'? 496 CPI Cheetah RZ/RGV hybrid
'22 765 Street Triple RS
'21 XTrainer
'69 Stinger T125 Suzuki
'23 TRS 250RR (it's a Trials thing)
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