That is normal because of the way the air flow around/over your body and creates a vortex /negative air pressure behind you, Causing it to pull the exhaust fumes up and over your back till it hits the air going over your helmet.
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Scott #465
Team Ugly Racing
Some Fear Racing "Cause if you don't have any you ain't going fast enough"
'06 CRF-450X!! '04 KTM 300E/XC
'06 CBR1000RR, '92 ZX-7R and '97 ZX-7RR
Feel the Thunder, Hear the Boom, Get ready it Four Strokin' Time!
"When cut do you bleed green? I used to!"
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