VALVE SPRING HEAT INSULATING WASHERS .700" BORE

FITS ALL HEAVY TWINS 500-828CC
FITS BENEATH THE VALVE SPRING SEATS TO PROLONG VALVE SPRING LIFE. GENERALLY FOUR WERE USED WITH A STANDARD CAM, ONLY TWO (ON THE EXHAUST) WITH A 2S CAM AND NONE WITH 4S BUT CYLINDER HEADS ALSO VARY AND ULTIMATELY IT IS THE ENGINE BUILDERS RESPONSIBILITY TO ALWAYS CHECK VALVE LIFT, ROCKER GEOMETRY AND SPRINGS FOR COIL BINDING.

THICKNESS: 0.080" (2.18MM)
WEIGHT: 1G
DIAMETER: 1.10" (27.9MM)
INSIDE DIAMETER: 0.7"