1/2" Diameter steel bar stock

Bikes in this year range that take a single gas cap use OEM 61103-36

these vented caps are 1-5/16"-12 thread and the Buna-N O-ring seal is gas and oil resistant and keeps your fluids contained

26 threads per inch

OEM# 2821-30

No. 59 Valve Guide Drivers - 5/16 I.D. - Harley-Davidson Evo Big Twin/Twin Cam/Evo XL Length_1.396" 1/2" Diameter steel bar stockAn essential for any engine builder! Valve Guide Drivers make short work of changing out those worn guides in those swap meet panheads you bought for a song. When working on heads, everything else is based off of the valve guide geometry. These drivers will help you be sure your new guides are put in correctly, which you definitlely want, since the seat geometry is based off of the orientation of the guide. These drivers are constructed from a high