Hot Rods – Crankshafts, including the 91-00 Kawasaki KX 80 crank, the 10-17 Honda CRF 250R crankshaft assembly, the 03-24 Yamaha YZ 250 and 16-24 YZ 250X assembly, and the 01-03 Suzuki RM 125 assembly. These are complete dirt bike cranks built from forged steel with pressed-in pins, sized rod journals and balanced flywheels, sold ready to drop into a freshly cleaned set of cases with new mains and seals. A crank is the part that takes every combustion hit and every hard landing, so once the big-end has slop, the taper is beat, or the halves have twisted out of true, no amount of new piston or top-end work will make the motor pull like it should. A straight, true motocross crankshaft keeps rod alignment right, holds bearing loads where they belong, and stops the vibration that chews up main bearings, crank seals and case halves. On the track that shows up as a bike that starts easily, revs cleanly, holds power deep into a moto, and does not shake your hands numb on long straights. Send us the year and model of your dirt bike and we will confirm the correct Hot Rods crankshaft or assembly fits before you order.