Full Version: 1974 yamaha gpx
does anyone know what the gas oil ratio is for this sled. thanks for your time
QUOTE(larky @ Oct 18 2007, 04:40 AM) 
does anyone know what the gas oil ratio is for this sled. thanks for your time
its also a fan cooled not free air, i was told the engine was from a sno-jet, and from what i've read they are the same,
is this true?
You can run 40:1 and even 50:1 with today's good quality oil (Shell Advanced, Bombardier Oil, etc).
Best bet is to go by the spark plug - if it is oily, then too rich. Always better to run a bit on the rich side as it is better to foul a plug then to pop a piston.
If a motor has not been run in a while, I like to run 32:1 for a bit.
Best bet is to go by the spark plug - if it is oily, then too rich. Always better to run a bit on the rich side as it is better to foul a plug then to pop a piston.
If a motor has not been run in a while, I like to run 32:1 for a bit.
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