Champion RN12YC Spark Plugs for Harley-Davidson Shovelhead and Evolution Metric Gas Tanks & Fuel Acc. (Light) 35mm Fork Seals (Fits 1977-84

35mm Fork Seals (Fits 1977-84 Yamaha XS650)

install your exhaust as usual

TR-4 type metal valve stem with locknuts and rim washer

Yield strength of 118

1/8" thick cold-rolled steel

Champion RN12YC Spark Plugs for Harley-Davidson Shovelhead and Evolution Metric Gas Tanks & Fuel Acc. (Light) 35mm Fork Seals (Fits 1977-84Champion 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