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Retired Moderator
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Discussion Starter #1
These are the specs of a very fast and popular bike of the 80s. Can you find what it is?

PERFORMANCE
STANDING START 1/4 MILE 11.37 [email protected] MPH
ACCELERATION 0-60 MPH 3.04 SECONDS
45-70 MPH, TOP GEARS (4) 7.44 SECONDS, 591 FT
(5) 9.04 SECONDS, 730 FT
(6) 12.64 SECONDS, 103 FT.
BRAKING, 60-0 MPH 111 FT
HORSEPOWER @60 MPH, TOP GEAR 9. 2 HP RIDER UP, 8.1 HP RIDER DOWN
ENGINE RPM @60 MPH 4319
AVERAGE FUEL CONSUMPTION RATE 34.4 MPG (14.6 KM/L)
CRUISING RANGE (MAIN/RESERVE) 155/45 MILES (249/72 KM)
LOAD CAPACITY (GVWR LESS CURB WEIGHT) 336 LBS (166 KG)
MAXIMUM ENGINE SPEED IN GEARS @ REDLINE (1) 50 (2) 76 (3) 97 (4) 114 (5) 127 (6) 139

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ENGINE
TYPE TWO STROKE, ROTARY VALVE INDUCTED SQUARE FOUR WITH EXHAUST PORT VALVES, LIQUID COOLED
BORE AND STROKE 56.0 X 50.6 MM (2.20 X 1.99 IN.)
PISTON DISPLACEMENT 498 CC (30.4 CU. IN.)
COMPRESSION RATIO 7.0-1
CARBURETION (4) MIKUNI 28,, FLATSLIDES
EXHAUST SYSTEM FOUR INTO FOUR WITH EXPANSION CHAMBERS
IGNITION BATTERY POWERED, INDUCTIVE, MAGNETICALLY TRIGGERED
AIR FILTRATION OILED FOAM ELEMENT
OIL CAPACITY 0.7 QUARTS (0.7 L)
[email protected] [email protected]
[email protected] [email protected]

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TRANSMISSION
TYPE SIX SPEED, CONSTANT MESH WET CLUTCH
PRIMARY DRIVE STRAIGHT CUT AND HELICAL GEARS 58/26, 2.23
FINAL DRIVE #530 CHAIN; 16/40 SPROCKETS, 2.50:1
GEAR RATIOS (TRANSMISSION) (1) 29/11, 2.64
(2) 28/16, 1.75
(3) 29.21, 1.38
(4) 27/23, 1.17
(5) 23/22, 1.05
(6) 22/23, .96
GEAR RATIOS (OVERALL) (1) 14.72
(2) 9.76
(3) 7.69
(4) 6.52
(5) 5.85
(6) 5.35

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CHASSIS
DOUBLE DOWNTUBE, FULL CRADLE, BOX SECTION ALUMINUM PERIMETRE FRAME; BOX SECTION ALUMINUM SWINGARM
SUSPENSION, FRONT CENTRE AXLE, AIR ADJUSTABLE FORK WITH 38MM TUBES, ADJUSTABLE SPRING PRELOAD AND ANTI DIVE VALVING
SUSPENSION, REAR (1) SHOCK ABSORBER, ADJUSTABLE FOR SPRING PRELOAD
WHEELBASE 56.1 INCHES (1425MM)
RAKE 25.2 DEGREES
BRAKE, FRONT HYDRAULIC, SINGLE DISC WITH DUAL PISTON CALIPER
BRAKE, REAR HYDRAULIC, SINGLE DISC WITH DUAL PISTON CALIPER
WHEEL, FRONT CAST, 2.50 X 16
WHEEL, REAR CAST, 2.75 X 17
TIRE, FRONT 110/90 V16 MICHELIN A48
TIRE, REAR 120/90 V17 MICHELIN M48
SEAT HEIGHT 31.3 IN. (794MM)
GROUND CLEARANCE 5.8 IN. (146MM)
FUEL CAPACITY (MAIN RESERVE) 4.5/1.3 GALLONS


Aris
 

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Retired Moderator
Joined
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943 Posts
Discussion Starter #3
RG500Gamma

Yes it is!
mthndz you got it right, congratulations :)
Not many 2 stroke square fours were made ;)

Aris
 
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