What is the best way to fix a Harley shovelhead when oversize seat will not work

 

The ID of the seat bore, needs to be .006" less than the seat.
Oversize seats are readily available, as are the custom manufacture of them, if needed, the seat bore is then machined to the dedicated diameter.
Scott

 

well, the old aluminum shovel heads weren't great to begin with.
mr. hillside made an excellent suggestion.
if the heads can not support available seats, a custom one can be made. the big issue is if the head can support it, aka, material too thin. in a case like this, the head can be filled in and a stock seat pocket be machined. weigh the cost of such against a set of good after-market heads.
another thing is if the stock seat is machinable to accept a larger valve. some chevy valves can make good donors, used chevy seats in the past.

 

We have seat material in bar-stock form, to accommodate such needs from time to time.
Easy job with the proper knowledge, and tools.
Scott

 

wondering why a avalaible seat wont work.we also make seats if needed,but different seat company`s have tons of options

 

Agreed.
Many pre-manufactured seat options out there.
Scott