How We Built a Faster GasGas MC250F Without Opening the Engine

#motocross 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. Subscribe to Motocross Action: https://hi-torque.com/product/subscri... Follow Motocross Action:    / @motocrossaction   Motocross Action Website: http://www.motocrossactionmag.com/ Motocross Action Facebook: https://www.facebook.com/pages/Motocr... Motocross Action Twitter:   / mxaction   Motocross Action Instagram:   / motocrossactionmag