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Race fuel needed for 112cc?

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I was wondering if I had to run race fuel with a yz112 thanks, highest octane I can get around here is 92

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That much of a Displacement increase requires a Head modification so that the the new wider diameter piston does not hit the 85 head gasket surface.

 

You could order the head however you want  or have another Head modified for your custom requirements Like one for race gas and another for Premium.

 

All the cylinder kit companies can help you with this you should call them

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We had the head modded for pump gas on my son's stock yz125.  Sent it to PowerSeal USA for $60.  No need for race fuel.  Can't afford it anyhow. 

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with the increased compression you should definitely run race fuel to avoid detonation, I suppose you could have another head modded as well to be able to run pump premium, but you may lose a little power doing this since the bike has a bigger piston. 

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