The smell of rubber and motor oil fill the vast warehouse stuffed with cars, trucks and motorcycles. The battle between man and machine reaches its pinnacle under the I-5 freeway in downtown Sacramento. The California Automobile Museum, 2200 Front St., is featuring the Born to Ride exhibit through March 12. The exhibit is chronological, following motorcycles from their humble beginnings at the turn of the 20th century to the current world speed record holder. This impressive machine, BUB 7, reached 367.382 mph in September at Bonneville Salt Flats, Utah. Bikes of all brands, spanning several countries and countless models, are on display. There's a 1912 Harley Davidson, once owned by Steve