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Is it safe to run Leaded fuel in a 250R??

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7.3K views 9 replies 9 participants last post by  Lasher-19  
#8 ·
mx250r91 said:
Lead increases the detonation resistance (octane) of the fuel.



This is one of the ways that the AMA helped to kill the two stroke in Pro-racing, by banning the use of leaded fuel.
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I was not aware that the AMA had banned leaded fuel. Is that strictly Pro racing or is that for any type of national AMA racing?
 
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