Quote: What are people using who own 60's - 70's Triumphs? If I remember correctly the 70's Bonnevilles recomended premium leaded gas. Premium leaded went away at the pump many years ago. Are there aftermarket additives available?
Yes, there are lead substitutes availabe anywhere that are used. Some restorers make a "no lead head" by inserting hardened exhaust valve seats and/or stellite-faced valves to better handle the lack of lubrication once provided by tetraethyllead in the gas. But frankly, the whole deal with seat recession is exaggerated and not worth worrying about for the average person. The average person does not run at high speeds for long periods and for thousands of miles.
