Honda installed these "tall drain hole O rings" in the head gasket area when they realized cb750 sohc models might have a weep age problem.

Our material is unaffected by heat and oils and is the proper length.

Note:
We have included and photo of Hondas later head gasket and cylinder for identification. 
 

Replaces Honda # 12115-300-000

In stock.

$12.00 for a set of 8