GRC RR (Midi)
The RR is the latest model to the list of very reliable midi moto bikes that GRC has produced. It comes from a long period of design and on track testing. It uses a steel trellis main frame and swing arm, they have also incorporated a beautifully machined piece of billet aluminum into the center section, and finished it off with a lightweight alloy sub-frame.
The RR is one of the best handling bikes in its class; it is also safe and extremely reliable. It has claimed many international and national victories due to its exquisite functionality and design.
Particular attention has been paid to the design of the new fairing, giving it a very aggressive look which makes it stand out from the crowd. The fairing is also very easily removed by five fasteners, exposing the entire inner workings of the bike for quick and simple maintenance on and off the track.
This bike is also very functional due to the number of engine specs available which makes it able to run in a number of different classes at the race track, and make it an excellent and durable hobby bike as well.
Bike Specifications
Engine Two stroke, single cylinder
Cooling Air or liquid cooled
Horse Power 4.2 to 15+hp
Carburetor (Dell’orto) SHA 14mm/ PHNB 18mm
Ignition Electronic
Fuel Premium gas/ 2% oil pre-mix
Intake Reed valve in crankcase
Starting Pull start
Clutch Dry with centrifugal counter weights
Frame Chrome-moly steel tubing with billet aluminum center section
Tires F- 90/65 R- 110/50
Front Brake Single 145 mm disc
Rear Brake Single 122 mm disc
Tank 1.8 liters (.048 Us gal.)
Spark Plug NGK B9ES
Weight 55 lbs.
Length 10.5 inches.
Seat Height 17.5 inches
4.2hp Polini Air cooled 39.69cc (36mmx39mm bore x stroke) 3 port cylinder head. Dellorto SHA 14-14L carburetor, single pedal reed induction into crankcase. Polini two-shoe adjustable clutch with centrifugal counter weights. 6.5” Billet aluminum light weight racing rims and removable hubs. PMT B compound racing slicks. Single floating 145mm front disc brake, and single 122mm rear disc brake. Standard exhaust and K&N style air filter. 6.2hp Polini Air cooled 39.69cc (36mm x 39mm bore x stroke) 3 port cylinder head. Dellorto SHA 14-14L carburetor, double pedal reed induction into crankcase. Polini two-shoe adjustable clutch with centrifugal counter weights. . 6.5” Billet aluminum light weight racing rims and removable hubs. PMT B compound racing slicks. Standard exhaust and K&N style filter. 8.0hp Polini Water cooled 39.69cc (36mm x 39mm bore x stroke) 3 port cylinder head. Dellorto SHA 14-14L carburetor, four pedal reed induction into crankcase. Polini two-shoe adjustable clutch with centrifugal counter weights. 6.5” Billet aluminum light weight racing rims and removable hubs. PMT T 41 racing slicks. Single floating 145mm front disc brake, and single 122mm rear disc brake. Racing exhaust, and K&N style air filter. 11hp BZM Water cooled 39.69cc (36mm x 39mm bore x stroke) 3 port cylinder head. Dellorto SHA 14-14L carburetor, four pedal reed induction into crankcase. BZM two-shoe adjustable clutch with centrifugal counter weights. . 6.5” Billet aluminum light weight racing rims and removable hubs. PMT T 41 racing slicks. Single floating 145mm front disc brake, and single 122mm rear disc brake. Racing exhaust, and K&N style air filter. 13hp BZM Water cooled Race Prepared R 39.69cc (36mm x 39mm bore x stroke) with a compression ratio of 15to1 and 5 port cylinder head with 40cc piston. Dellorto 15mm carburetor, four pedal reed induction into crankcase.BZM two-shoe adjustable clutch with centrifugal counter weights. . 6.5” Billet aluminum light weight racing rims and removable hubs. PMT T 41 racing slicks. Single floating 145mm front disc brake, and single 122mm rear disc brake. Racing exhaust, and K&N style air filter. Domino ¼ turn quick throttle. Adjustable steering damper. 13.5hp BZM Watercooled Race Prepared R 39.69cc (36mm x 39mm bore x stroke) 5 port cylinder head with 40cc piston. Dellorto PHBN 18mm carburetor, four pedal reed induction into crankcase. Race crankshaft (for extra crankcase pressure). BZM two-shoe adjustable clutch with centrifugal counter weights. . 6.5” Billet aluminum light weight racing rims and removable hubs. PMT T 41 racing slicks. Single floating 145mm front disc brake, and single 122mm rear disc brake. Racing exhaust, and K&N style air filter. Domino ¼ turn quick throttle. Adjustable steering damper. 15.5 hp BZM Watercooled 49.3cc (40mm x 39mm bore & stroke) with compression ratio of 16.5:1 and five-port Bi-Zeta engine and piston (50cc). Carbon fiber reed (4) induction into crankcase and race crankshaft (for extra crankcase pressure). Rubber manifold with an 18mm PHBN carburetor. ). BZM two-shoe adjustable clutch with centrifugal counter weights. . 6.5” Billet aluminum light weight racing rims and removable hubs. PMT T 41 racing slicks. Single floating 145mm front disc brake, and single 122mm rear disc brake. Racing exhaust, and K&N style air filter. Domino ¼ turn quick throttle. Adjustable steering damper.
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