Champion RN12YC Spark Plugs for Harley-Davidson Shovelhead and EvolutionChampion RN12YC Spark Plugs for Harley Davidson Shovelhead and Big Twin Evolution Whether it's time for a tuneup or you're troubleshooting an acute ignition problem, these Champion spark plugs will restore lost ignition performance. Copper core Zinc plated shell for corrosion resistance Resistor for suppression of electromagnetic interference Sold as a pack of four

Smart idea

Get rid of your ugly "Yamaha" side cover and replace it with this custom CNC machined billet aluminum "blank" side cover

tach drive or cam chain tensioner o-rings/gaskets

Exploded assembly views show exact part placement

Yamaha XS650 Rear Wheel Bearing and Seal Kit

you'll want to be certain that the pressure is correct at all times for obvious reasons

Many Harley-Davidsons equipped with Evolution engines (Sportster and Big Twin alike) and Twin Cams experience starter failure

High quality front inner tube with threaded metal valve stem

Full Installation Instructions as well as 3D exploded parts diagram makes 100% bolt on installation very simple with common hand tools

Accepts bayonet-style (cam-lock) fuel cap

It's the backbone of the electrical system

This kit provides the ultimate in comfort