whats a race gas ?

4 replies to this topic
  • gal

Posted April 15, 2002 - 09:13 PM


i live in israel and the only fuel i can get is
95 unleaded
98 unleaded
and 96 leaded ....
i use the96, thats what the local yamaha dealer suggested.

  • yamaha.dude

Posted April 15, 2002 - 10:30 PM


you don't need to use leaded fuel, in fact, you should try and avoid it...

use the 98 unleaded...

Race gas that is spoken about here on TT is a specially distilled higher octane fuel, and the main reasons that people want to run it is that it allows higher compression or modified timing to get a few more horsepower up high... to use it effectively you need to re-jet, and change your timing... Race gas by itself has no extra 'power' built-in, it just allows you to tune your motor a bit more highly...

Stick with the 98 and get your jetting right for that... you will be fine...



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  • BigLou

Posted April 16, 2002 - 06:07 AM


I'm guessing that the octane numbers listed are the "RON", or Research Octane Number. This would equate to 93 U.S. pump octane for the 98 unleaded.
Still more than adequate for a stock YZF.

  • gal

Posted April 16, 2002 - 06:37 AM


why not leaded fuel?
the bike runs great with it at the moment.
should i still consider 98 unleaded ?

  • jamracing

Posted April 16, 2002 - 10:13 AM


Hey man,
The YZF motor is designed for unleaded fuel, and you'll gain more by running a higher octane than running lead. Also, the gas in Israel is rated differently, and you should be running the higher octane.
When I worked for Honda there, they said not to run leaded fuels, because the deposits that they leave behind are not good for the motor.
See you in 3 months...

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