Yamaha YZ490 Top End Engine Bolt Nuts Kit Zinc YZ 490 Cylinder Head Rebuild IT
You wont need another nut or bolt to complete your engine’s top end rebuild. M12 Cylinder Base Flange Nuts 90179-12588-00. Exhaust Bolts (or Flange Nuts if your model has studs). Designed to complete your top end rebuild using only the highest quality fasteners.