The 2026 GasGas MC250F is quieter than ever, but meeting future AMA sound regulations came with a slight performance penalty. So, we wanted to know: how much power could we get back without ever opening the engine? (Side note: We don’t care how loud it is). For this project bike, Jay Clark teamed up with Jamie Ellis at Twisted Development to wake up the MC250F using a custom-mapped Vortex ECU, proprietary dual-injector system, FMF Factory 4.1 exhaust and freer-flowing intake. No piston, no cams, no porting and no engine work.

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