Hose is exactly how I kept my shop air 'cleaner' .
You can get dryer vent hose pretty cheap , almost anywhere .
Fix a box computer cooling fan ( they run off 12 volt and are about 4 inches in size ) on the end , with a type of funnel .
Hang or stand that close to the exhaust exit of the bike/motor and the other end out the window or other exit . Maybe install a dryer vent somewhere in a wall .