Quote:
Originally Posted by Douglas Willinger
So as to avoid the cylinder wall scuffing, is such a partial water jacket filling required for a 4.375" stroke. Or for a 4.25" or even 4.0"?
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Filling the block seems to help everything, from what we've seen in our experience. However the Boss Bird guys have had success without ever using block fill. I can't say it's a necessity but almost every serious effort stock block build we've done has been filled.