1973 Yamaha CT3-175
Specifications and workshop reference information for the 1973 Yamaha CT3-175, including engine, chassis, service data and setup details.
Note: Specs are compiled from factory data, manuals and owner feedback. Bikes vary — if yours is different, jump into the forum and share it.
General Specifications
| Engine Type | Air-cooled, 2-stroke, single-cylinder |
| Displacement | 171 cc |
| Bore × Stroke | 66 mm × 50 mm |
| Compression Ratio | 6.8:1 |
| Maximum Power | 16 bhp @ 7,000 rpm |
| Maximum Torque | 1.64 kg-m @ 5,500 rpm |
| Carburetor | Mikuni VM24SH |
| Lubrication | Yamaha Autolube |
| Fuel Mix Ratio | N/A - oil injection |
| Ignition | Magneto |
| Spark Plug | NGK B8ES |
| Spark Plug Gap | 0.5-0.6 mm |
| Engine Type | Air-cooled, 2-stroke, single-cylinder, 7-port, reed-valve induction |
Transmission
| Transmission Type | 5-speed manual |
| Clutch | Wet multi-plate |
| Primary Reduction | 3.900 |
| Final Reduction | 16 / 45 |
| Overall Reduction | N/A |
Dimensions
| Overall Length | N/A |
| Overall Width | N/A |
| Overall Height | N/A |
| Wheelbase | N/A |
| Ground Clearance | N/A |
| Fuel Tank Capacity | 7 L |
Chassis
| Frame Type | Steel tube frame |
| Caster Angle | N/A |
| Trail | N/A |
| Front Suspension | Telescopic fork |
| Rear Suspension | Twin shock |
| Front Suspension Travel | N/A |
| Rear Suspension Travel | N/A |
Brakes & Wheels
| Front Tire | 3.25 × 18 |
| Rear Tire | 3.50 × 18 |
| Front Brake | Drum |
| Rear Brake | Drum |
175cc Other Specs
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