Shouldn't think so, but if anyone has, it would be one of the gokart folk who used to mod [radically in some cases] Victa full-crank engines.
No way it could be done with factory barrel porting/carby/exhaust, I'd reckon - just not sufficient gas flow.
Cheers,
Gadge
"ODK Mods can explain it to you, but they can't understand it for you..."
"Crazy can be medicated, ignorance can be educated - but there is no cure for stupid..."
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