TY175: Brochure

Here's a scan of a period TY175 2 page brochure.

The Perfect Balance: Yamaha TY175

Superb lightweight engineering and years of invaluable experience in off-road competition have enabled Yamaha to produce, in the TY175, one of the most effective trials machines on the market. A ·slim, light, high-tensile steel frame with a specially developed engine perfectly poised for balance and manoeuvrability forms the basis of a devastatingly effective competition machine. Refinements include a flywheel magneto ignition system designed to produce a strong spark at low engine speeds and a chain tensioner to enhance rider control. The TYl75 has quickly become recognised as one of the finest lightweight trials machines in the world.

Transmission

A six-speed gearbox with carefully selected, widely spaced ratios enables the TY’s power to be most effectively used through the sections or between them.

Engine

A single-cylinder 171cm3 engine has been specially developed to produce low-speed torque while retaining useful power throughout the rev range. Aultolube lubrication, supplying oil under pressure from a separate tank, not only ensures reliability but leads to a clean, swift throttle response. Urgent low-speed punch is guaranteed by Yamaha’s Torque Induction reed-valve system, which utilises fluctuations in crankcase pressure to deliver precisely the measure of fuel required.

Frame

Yamaha’s experience in world-class trials, particularly in drawing upon the development riding expertise of Mick Andrews, has led to the creation of the TY’s light, high-tensile steel frame. The engine is located for optimum balance and maximum manoeuvrability and the machine J as a whole has an exceptional power-to-weight ratio.

Special features

Street-legal speedometer is well protected behind left fork leg; ignition system, fired by a crankshaft  mounted magnet, is specially designed to produce a fat spark at low engine speeds; chain tensioner absorbs slack and improves control; aluminium bash plate protects engine; special   silencing system enhances enjoyment of the country side.

Suspension

Heavy duty long-travel front forks with slow, positive damping are used in conjunction with rear units capable of five-way adjustment.

Brakes

Yamaha’s special labyrinth seal, double- ridge brake plates on both front and rear drums prevent water and dust from penetrating.

SPECIFICATIONS

ENGINE

Type                              2-stroke, 1-cylinder

Displacement                171 cm3

Bore & Stroke                66 x 50 mm

Compression ratio         5 .8: 1

Max. horsepower           8.8 kW (12 PS) @7,000 rev./min.

Max. torque                   13.7 Nm (1.4 kg—m) @6,000 rev./min.

Lubrication system         Autolube

Starting system              Kick starter

Primary transmission     Gear

Final transmission          Chain

Gearbox                         6-speed

Carburettor                     VM22SS

Clutch                            Multi-plate, wet

Charging system           Flywheel magneto

Ignition system              Magneto

DIMENSIONS

Overall length                1,955 mm

Overall width                 835 mm

Overall height                1,100 mm

Wheelbase                    1,265 mm

Seat height                    750 mm

Ground clearance. .r     295 mm

Weight (net)                  81.0 kg.

Fuel tank capacity         4.0 lit.

Oil tank capacity            0.3 lit.

Tires

Front                              2.75-21 -4PR

Rear                               4.00-18-4PR

Brakes

Front                              Drum

Rear                               Drum