Got a classic Kawasaki KZ400-B from '78 or '79 that's misfiring or hard to start? This Caltric ignition coil is a direct replacement for the original (OEM part number 21121-1174). It's brand new, black, and built with copper windings for reliable spark. Dimensions are roughly 114mm long x 45mm wide. Connector type is male, so it plugs right into your bike's wiring. Improves starting and running performance if your old coil is weak. Comes with a 90-day warranty. Made in China, but Caltric is known for decent aftermarket motorcycle parts. This is not a universal fit – it's specifically for those KZ400 models. Perfect for DIY mechanics restoring or maintaining vintage bikes. Installation is straightforward: unbolt the old one, swap the wires, and bolt this one on. Bring your classic back to life with a fresh, strong spark. Keep your ride running smooth and dependable. Don't let an old coil strand you – upgrade with this affordable replacement. Order now and fire up your KZ with confidence!