Yamaha AT1-MX 125 Specs - Vintage Motorcross Enduro
Yamaha AT1-MX 125 Motorcross
The Yamaha AT1 In previous post is already explained that Yamaha AT Series
also have another Variants beside the regular ones.
The M or MX Is stands for the Motorcross Purpose, and previously being said that Yamaha AT1-MX has some differences than the regular Yamaha AT-1 125 Enduro. The parts of regular AT-1 were stripped down like the Tires fit, Exhaust, Carburetor and etc.
Yamaha AT1-MX Has also increase the performance through the compression ratio that gain more Horsepower and it also losing the weight that Yamaha AT1-MX is way lighter to get a better entry level motorcross. But Even this bike is developing the performance, AT1-MX is still Less powerfull Than DKW's, Pentons and Bultacos.
Yamaha AT1-MX Has never beat their domination, and it's just Standing in 125cc level for one year and then fade away. Finally In 1974 Yamaha comeback with a better Motorcross, Yamaha YZ-125 That will be a big deal in its level.
The M or MX Is stands for the Motorcross Purpose, and previously being said that Yamaha AT1-MX has some differences than the regular Yamaha AT-1 125 Enduro. The parts of regular AT-1 were stripped down like the Tires fit, Exhaust, Carburetor and etc.
Yamaha AT1-MX Has also increase the performance through the compression ratio that gain more Horsepower and it also losing the weight that Yamaha AT1-MX is way lighter to get a better entry level motorcross. But Even this bike is developing the performance, AT1-MX is still Less powerfull Than DKW's, Pentons and Bultacos.
Yamaha AT1-MX Has never beat their domination, and it's just Standing in 125cc level for one year and then fade away. Finally In 1974 Yamaha comeback with a better Motorcross, Yamaha YZ-125 That will be a big deal in its level.
Yamaha AT1-MX 125 Specification
| Yamaha AT1-MX 125 Specification | |
|---|---|
| Year | 1969-1971 |
| Bore (mm) | 56 |
| Stroke (mm) | 50 |
| Capacity (cc) | 123 |
| Compression Ratio (to 1) | 08.00 |
| Bhp @ rpm | 18 @ 8,500 |
| Torque (kgm) @ rpm | 1.57 @ 7,500 |
| Oil System | Autolube |
| Engine Cooling | Air |
| Carburetor (mm) | VM26SH |
| Ignition System | Magneto |
| Ignition Timing (mm) | 02.00 |
| Primary drive gearing | 03.09 |
| Final Drive Gearing | 45/14 (45/15[1]) |
| Box Gearing first | 3.18 (2.831) |
| Box Gearing second | 2.0 (1.88[2]) |
| Box Gearing third | 1.37 (1,372) |
| Box Gearing fourth | 1.0 (1.092) |
| Box Gearing fifth | 0.8 (0.962) |
| Box Gearing sixth | - |
| Fuel Cap. (liters) | 7 |
| Engine Oil Cap. (liters) | 01.23 |
| Gearbox Oil Cap. (Liters) | 0.74 (0.762) |
| Fork Oil Ca. (cc/leg) | 160 (1501) |
| Front Tire (stock) | 3.00 x 18 |
| Rear Tire (stock) | 3.25 x 18 |
| Front Brake | Drum |
| Rear Brake | Drum |
| Rear Suspension | Twin shock |
| Front Susp. Travel (mm) | 145 |
| Rear Susp. Travel (mm) | 110 |
| Rake (degrees) | 29.05.00 |
| Trail (mm) | |
| Width (mm) | 909 |
| Ground Clearance (mm) | 225 |
| Wheelbase (mm) | 1,285 |
| Dry Weight (kg) | 91 |
Yamaha AT-1 MX 125 Video
Yamaha AT1-MX 125 Pictures
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