I think that specific class of the sport is a bit overlooked here.
Pro Stock Motorcycle is a drag racing class that is the two-wheeled equivalent of Pro Stock. It has been a feature of NHRA drag racing since the 1980s when it was added to the professional class structure and has since spread around the globe. The class has for years been dominated by straight-4 Suzuki based bikes but in recent years Harley-Davidson based V-twin machines have become more competitive due to favourable rule changes. Frames are purpose-built specifically for drag racing and are not based on their road-going counterparts.
The bikes have differing weights depending on engine combination - 575 pounds for Kawasaki, 590 for 92-cid Suzuki, 615 for 101-cid Suzuki, and 615 for Harley-Davidson and V-Twin, including rider - and have a maximum wheelbase of 70 inches. Bikes must be 1998 or later models and retain their stock appearance, including a front fender, simulated headlight and taillight, and manufacturer identification on both sides. The engine and body make must be the same. All motorcycles must pass NHRA body inspection prior to competition.
Anatomy of an NHRA Pro Stock Motorcycle
![Image]()
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
![Image]()
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
![Image]()
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
![Image]()
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
![Image]()
Wheelie bar:
The lengthy aluminum "wheelie bar" stretches 130 inches beyond the rear axle and keeps the powerful bike from flipping over backward
![Image]()
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 this 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
![Image]()
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
PERFORMANCE:
Zero to 60 in one second (3 G’s of acceleration); Zero to 100 in two seconds; Quarter mile, low 7's.
NHRA Finals 2006 - Pro Stock Bike Championship Run
http://www.youtube.com/watch?v=wn57Zonp71I
Angelle Sampey's first NHRA official 6 second run
http://www.youtube.com/watch?v=Ud-_7EAFe5I
Ralph Medrano Jr has a motor explode Outlaw Prostreet (not pro stock)
http://www.youtube.com/watch?v=j4GtWdwLUEw
Mirock Outlaw Pro Street Finals Rockingham, NC (not pro stock)
http://www.youtube.com/watch?v=he_j-GZdCNs
![Image]()
Any enthusiasts around? :rock
Pro Stock Motorcycle is a drag racing class that is the two-wheeled equivalent of Pro Stock. It has been a feature of NHRA drag racing since the 1980s when it was added to the professional class structure and has since spread around the globe. The class has for years been dominated by straight-4 Suzuki based bikes but in recent years Harley-Davidson based V-twin machines have become more competitive due to favourable rule changes. Frames are purpose-built specifically for drag racing and are not based on their road-going counterparts.
The bikes have differing weights depending on engine combination - 575 pounds for Kawasaki, 590 for 92-cid Suzuki, 615 for 101-cid Suzuki, and 615 for Harley-Davidson and V-Twin, including rider - and have a maximum wheelbase of 70 inches. Bikes must be 1998 or later models and retain their stock appearance, including a front fender, simulated headlight and taillight, and manufacturer identification on both sides. The engine and body make must be the same. All motorcycles must pass NHRA body inspection prior to competition.
Anatomy of an NHRA Pro Stock Motorcycle
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
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
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
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
Wheelie bar:
The lengthy aluminum "wheelie bar" stretches 130 inches beyond the rear axle and keeps the powerful bike from flipping over backward
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 this 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
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
PERFORMANCE:
Zero to 60 in one second (3 G’s of acceleration); Zero to 100 in two seconds; Quarter mile, low 7's.
NHRA Finals 2006 - Pro Stock Bike Championship Run
http://www.youtube.com/watch?v=wn57Zonp71I
Angelle Sampey's first NHRA official 6 second run
http://www.youtube.com/watch?v=Ud-_7EAFe5I
Ralph Medrano Jr has a motor explode Outlaw Prostreet (not pro stock)
http://www.youtube.com/watch?v=j4GtWdwLUEw
Mirock Outlaw Pro Street Finals Rockingham, NC (not pro stock)
http://www.youtube.com/watch?v=he_j-GZdCNs
Any enthusiasts around? :rock
