Welcome to motorcycle dyno tuning explained as we couldn’t pass up the generous offer motorcycle drag racer Jack Robinson made for us to bring the Cycledrag Suzuki HAYABUSA up to his Fresno, Ca. shop for some motorcycle dyno pulls, testing and tuning. In this video we get a great education about air / fuel ratio, how massive amounts of horsepower can be made through the stock ECU and we also see a Harley Softail, a pair of BMW S 1000rr motorcycles and a Buell drag bike make some dyno runs. Settl

If an engine fails (spoils) during a dyno run, it usually means the motor was pushed beyond its safe limits under controlled but extreme load conditions. Dyno testing stresses an engine at wide-open throttle, making any weak points show up quickly. ⸻ ⚡ What Can Happen During Dyno Failure 1. Catastrophic failure • Thrown rod or piston: Metal parts break through the block (“windowed block”). • Seized engine: Bearings overheat and lock the crankshaft. 2. Head gasket failure • Coolant and oil mix, w