Knucklehead tappet guides are rare enough, guides that are still in good working condition are almost impossible to find.

But help is on the way: Cannonball tappet guides are cast and meticulously machined in Germany to OEM specs and fit OEM and Cannonball Knucklehead cases. Just paint or coat them and you’re ready to go. Replaces OEM# 18610-36 18600-36