Two stroke banchies
Dominate the dunes
For Years and years of after
Market products proved, criogeninics
, shootpin, billlet block and hears, forging, carrillo"s etc
Just for a little education
Of ultra light weight crazy power engines look for "Tularis" a three cilinder two stroke motorcycle that shake the big bike teams years for years (if I'm not mistaken the designer end up as a director of s formula one team somewhere)
Again is all about torque and powerband, I like low bottom end tractable power, if you want ultra light maybe your choices will
Be different