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A Little History/Specs

Here's what I know...

bare GSX-R50

The Suzuki GSX-R50 is quite a rare bike. It's also known as the Suzuki RB50 and affectionately called GAG in Japan. I think it was first produced back in 1986 and discontinued after 1987. Production numbers are unkown to me but I believe that they were fairly limited compared to it's competition at that time, the Yamaha YSR50 and Honda NSR50. It's main difference from the competition is that it was powered by a 4-stroke 50cc engine. Though the competition could beat it in most performance aspects, it is easy to ride and maintain which gives it the appeal to it's owners. Several manufacturers did produce go-fast products for this bike. Sadly though, most of these parts are no longer in production. Current owners have to get by with custom-made parts or adapting parts from other bikes. It is not uncommon to see owners swapping-in parts from the NSRs and YSRs. For more details, checkout the specifications.

rear detail

front wheel detail

Dimensions and Dry Mass
 
Overall Length-
          1,540mm (60.6in)
Overall Width-
          610mm (24.0in)
Overall Height-
          870mm (34.3in)
Wheelbase-
          1,080mm (42.5in)
Ground Clearance-
          115mm ( 4.5in)
Dry Mass-
          63kg (139ibs)
Seating capacity-
          1 person
 
Engine
 
Type-
          Four-stroke, air-cooled, OHC
Number of cylinders-
          1
Bore-
          39.0mm (1.535in)
Stroke-
          41.8mm (1.646in)
Piston displacement-
          49.9cu. cm (3.0cu. in)
Compression ratio-
          10.3:1
Horsepower-
          5.2ps/7000rpm
Torque-
          0.57kg-m/6000rpm
Carburetion-
          Mikuni VM13SH, single
Air cleaner-
          Polyurethane foam element
Starter system-
          Kick
Lubrication system-
          Wet sump
 
Transmission
 
Clutch-
          Wet, multi-plate type
Transmission type-
          4-speed constant mesh
Gearshift pattern-
          1-down, 3-up
Primary reduction-
          3.842 (73/19)
Final reduction-
          2.642 (37/14)
Gear ratios:
          1st-3.400 (34/10)
          2nd-1.933 (29/15)
          3rd-1.315 (25/19)
          4th-1.095 (23/21)
Drive chain-
          Takasago RK420 or Daido D.I.D.420,
          100 links
 
Electrica
 
Ignition type-
          Suzuki "PEI"
Ignition timing-
          27deg. +/- 2deg. B.T.D.C. at 6,000 r/min.
Spark plug-
          NGK C6HA or Nippon Denso U20FS-L
Generator-
          A.C. generator
Headlight-
          6V 25W/25W
Tail/Brake light-
          6V 3W/10W
 
Chassis
 
Front suspension-
          Telescopic, coil spring, oil-damped
Rear suspension-
          Swingarm, oil damped
Steering angle-
          30deg. (right & left)
Caster-
          26deg.
Trail-
          80mm (3.1in)
Turning radius-
          2.5m (8.0ft)
Front brake-
          Disc brake, hydraulically operated
Rear brake-
          Internal expanding
Front tire size-
          3.50-10-2PR
Rear tire size-
          3.50-10-2PR
 
Capacities
 
Fuel tank including reserve-
          7.0L (1.8/1.5 US/Imp gal)
Fuel tank reserve-
          1.6L (1.7/1.4 US/Imp qt)
Engine oil-
          800ml (0.85/0.70 US/Ip qt)
Front fork oil-
          94ml (3.18/3.31 US/Imp oz)

instrumentation detail