by sportsterpaul » Wed Nov 23, 2016 2:54 pm
For XL valve guides, I am a big believer in cast iron. The graphite in the iron self-lubricates and works just fine, and thermal expansion matches the head. Brass guide transfer heat better but wear out faster. For valves, my motor man said cheap nitrated valves work great with cast iron guides. I never understood stainless steel valves, its a crappy material that scuffs and has other problems just look at SS guns. Stainless is good a high temperature, but an old Iron Sportster does not have that much heat to worry about.
And in the name of heavenly mercy, and in the spirit of Thanksgiving, will somebody post the correct answer to the capcha question "When cold, you ___ the choke.:"
Thanks, Pilgrim
Paul