The Ti-6 Pro Titanium Exhaust System was created for professional racers competing in a series such as AMA Supercross or AMA Motocross.The mix can be moved to 60:1 if you will be doing a lot of trolling. I have a ktm 003 65 and I use ams oil exast power you can buy it at Canadian tire for have the price the book says 40 1 but I was fouling so I used 50 1 and haven't fouled since good Luck hope it the fuel ratio for a 1977 Johnson 6hp is 50:1.Experts agree that it is better to err toward the side of too much oil, rather than not enough.
