1971 Yamaha HT1 HT2 Specification
Yamaha HT1/HT2
Yamaha HT1/HT2 was the 90cc version of the DT-1 copy model that had been
expanding its line to various classes. Its 5-port engine had been set to 8.5PS
to make it easy to treat from the 89 cc 2-stroke engine.
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| 1971 Yamaha HT1/HT2 90 cc Specification |
Yamaha HT1/HT2 Specification
Here's the detail of Yamaha HT1/HT2 Specification that served in the table
below.
| Yamaha HT1 HT2 Specification | |
|---|---|
| Year |
1970-71 |
| Frame/Engine Prefix (XXX-000101) |
HT1/HT2 |
| Bore (mm) |
50 |
| Stroke (mm) |
45.6 |
| Capacity (cc) |
89 |
| Compression Ratio (to 1) |
6.8 |
| Bhp @ rpm |
8.5 @ 8,000 |
| Torque (kgm) @ rpm |
0.9 @ 6,500 |
| Oil System |
Autolube |
| Engine Cooling |
Air |
| Carburetor (mm) |
VM20SC |
| Ignition System |
Magneto |
| Ignition Timing (mm) |
1.8 |
| Primary drive gearing |
3.9 |
| Final Drive Gearing |
49/14 |
| Box Gearing first |
3.18 |
| Box Gearing second |
2.0 |
| Box Gearing third |
1.37 |
| Box Gearing fourth |
1.0 |
| Box Gearing fifth |
0.8 |
| Box Gearing sixth |
- |
| Fuel Cap. (liters) |
6.5 |
| Engine Oil Cap. (liters) |
1.2 |
| Gearbox Oil Cap. (Liters) |
0.75 |
| Fork Oil Ca. (cc/leg) |
140 |
| Front Tire (stock) |
2.75 X 18 |
| Rear Tire (stock) |
3.00 x 18 |
| Front Brake |
Drum |
| Rear Brake |
Drum |
| Rear Suspension |
Twin shock |
| Front Susp. Travel (mm) |
|
| Rear Susp. Travel (mm) |
|
| Rake (degrees) |
|
| Trail (mm) |
|
| Width (mm) |
900 |
| Ground Clearance (mm) |
225 |
| Wheelbase (mm) |
1,220 |
| Dry Weight (kg) |
85 |
 |
| Yamaha HT1 HT2 90cc |
Yamaha HT1/HT2 Top Speed
The Top Speed of Yamaha HT1/HT2 Wasn't exactly noted , But There are some HT1/HT2 Owners who test the top Speed to prove the maximum performance of This great Yamaha HT1/HT2 90 cc. Check out this Video to see the detail of its Top Speed.
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