Its the same for us, we don't work well on thin air and nether do bikes (unless they've been set up to)The thicker the air the bigger the bang!
Best performance on a cold dry day.Worst, hot and humid.All to do with relative air density.
Just to throw another spanner into this discussion...humidity HELPS atomization of fuel and you motor run better............Dont believe me...........well (Mike).the Chance-Vought Corsair a 2ww fighter plane had a water injection system that when activated would spray water into the chamber for as long as the water tank lasted (approx 10 mins) giving the plane an immediate performance jump of about 30 knots..........fairly impressive huh!a humid evenig as the air ccols and densens up with a touch of humidity and your motor runs sweet! A lot of performance cars run water injection to help things as well !
KTM 2 stroke stuff / XR650R stuff. Stiffy's house of bling
Water injection and riding/drying/flying in humid conditions are not the same thing.Water injection was done mainly to cool the air charge and increase density.A humid evening will be better for engine performance than in the day, but it's still humid air and not so dense as dry cold air.
Jaffa Racer wrote
oh not forgetting ram air induction and pressurised air boxes got any maths for those
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