I have a 100" ULTIMA motor....( forget factory assistance...non existent... they only deal with their retailers and will not or can not give you a list of dealers in your area) .Broke a BEEHIVE style valve spring at just under 15,000 miles. Replaced them all with standard type springs ( designed for the high lift ) with inners and outers.
Reassembled motor and it ran great for 3 miles...BROKE all four long head bolts. I know I shouldn't have ...but I did re-use the old ones.
Torque according to Ultima.....( FINAL TORQUE OF 42 FT lbs in 5 steps checking each step twice) Lubricated the treads with anti-seize
The long ones are the same as the stock ones on a 89 EVO, but the short ones are 1/4" longer than the stock ones.. Is there a stock bolt for any one of the family of H.D. motors that is the same as these short ones.
THEY ARE: 3/8 SAE thread( coarse ) ...1/2 " diameter and a length of 1.9"
I do not want to reassemble this with the original short bolts....even though they seem
to be OK.
Any help/advise and /or moral support would be appreciated.
I'd rather ride than wrench