enlarge Whizzer "H" head bolt holes to 5/16

[jameyslane]

Is it ok to enlarge the Whizzer "H" head bolt holes to 5/16 so it can be used on a "J" model cylinder?
thanks
Jamey

 

[Quenton Guenther]

Yes,

Just be careful of bolt length, as some of the "H" heads have different heights of bolt ramps.

The very early "H" heads used 2 different lengths of head bolts, and mixing them up would break off some of the cylinder fins. The later "H" heads used the 5/16" bolts, I think after motor number H-120,000.

The "H" & "J" heads have the same combustion chamber.

Have fun,

 

[jameyslane]

thanks

Thanks Quenton........I appreciate you answering my question.
Jamey