IIRC... '72 CT-2; first year for Yamaha adding reed valves to the induction tract (aka "Torque Induction"). I had a '70 or '71 AT-1 125 around that time... it was IMO an oddball cuz it had the electric start option, too. Looked like this one --> https://marblesmotors.com/product/1971-yamaha-at1-125cc-electric-start/
2021 Challenger 6.4L Scat Pack 1320
100% stock: 1.680, 11.894 at 113.75 (DA 175 ft)
weight reduction, wheels, tires, Hellcat air box: 1.661, 11.686 at 115.97 (DA 710 ft)
1973 Challenger 452 ci street/strip [2008]
pump gas, DOT radials: 1.454, 10.523 at 126.44 (DA 514 ft)
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