| Anatomy of an NHRA Pro Stock Motorcycle | ||
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| CHASSIS:
The Pro Stock Bike chassis is adjustable for wheelbase, between 68 and 70 inches. The long 4130 chromoly frame has no rear suspension but the front end features a modern "upside-down" telescopic fork with the larger-diameter outer tubes located on top for increased stability. |
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| TRANSMISSION:
The rider shifts the five-speed transmission with an air shifter, activated by a small handlebar-mounted button. An air ram powers the transmission into the next gear. |
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| ON-BOARD
COMPUTER:
The on-board Race Pack computer monitors critical engine functions such as engine rpm, wheel speed, air/fuel mixture and exhaust-gas temperature. The information is downloaded to a computer inside the race transporter and is reviewed after each run to help mechanics make adjustments to the motorcycle. |
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| REAR TIRE:
A 10-inch wide Mickey Thompson racing slick puts the power to the ground and is good for eight runs down the drag strip. |
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| Wheelie bar:
The lengthy aluminum "wheelie bar" stretches 130 inches beyond the rear axle and keeps the powerful bike from flipping over backward. |
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| ENGINE:
Most NHRA Pro Stock Bikes are powered by a 300 horsepower (or more), 1,500cc (92 cubic inch) Suzuki engines. The double-overhead cam four cylinder engines feature eight-valve heads and rev to 13,500 rpm. Each cylinder has two spark plugs to help evenly burn fuel in the combustion chamber -- with a super-high compression ratio of 18 to one. The ignition for Steve's bike is controlled by an fully adjustable MSD MC-4 ignition module. Four Lectron flat-slide carburetors control the air-fuel mixture. During one quarter-mile race, this Pro Stock bike burns 20 ounces of 114-octane VP Racing Fuel. |
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| AERODYNAMIC
BODYWORK:
Superlight carbon fiber bodywork is wind-tunnel designed for the best airflow over and around the machine. The bodywork resembles that of the standard, road-going Suzuki GSX-R motorcycle. |
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| SAFETY
GEAR:
Rider Steve Johnson wears a full-leather, abrasion-resistant suit with a built-in plastic back protector made by Vanson Leathers. The lightweight helmet is made from carbon kevlar and the gloves are kevlar reinforced for strength. |
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BEST PERFORMANCE: Zero to 60 in one second (3 G’s of acceleration); Zero to 100 in two seconds; Quarter mile ET 6.982 seconds at 193.43 mph. |
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| FOR MORE INFORMATION, CONTACT: Steve Johnson 205-956-4777 | ||