“Minsk” M105 is a lightweight two-seater motorcycle from the Minsk motorcycle family manufactured by the Minsk Motorcycle and Bicycle Plant ( BSSR , Minsk , the current name is OJSC Motovelo). It was produced from 1967 to 1971 . The predecessor is the Minsk model M104 , the successor is the Minsk M106 model.
| "Minsk" M105 | |||||||||||||||||||||||||||||||
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| general information | |||||||||||||||||||||||||||||||
| Manufacturer | Minsk Motorcycle and Bicycle Plant | ||||||||||||||||||||||||||||||
| Years of release | 1967-1971 | ||||||||||||||||||||||||||||||
| Previous Model | "Minsk" M104 | ||||||||||||||||||||||||||||||
| Next model | "Minsk" M106 | ||||||||||||||||||||||||||||||
| Type of | road | ||||||||||||||||||||||||||||||
| Components | |||||||||||||||||||||||||||||||
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| Lubrication system | together with fuel | ||||||||||||||||||||||||||||||
| Gearbox |
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| Drive unit | Chain PV-9.525-1200, gear ratio 2.75 | ||||||||||||||||||||||||||||||
| Fuel supply | gravity | ||||||||||||||||||||||||||||||
| Front tire | 2.50-19 " | ||||||||||||||||||||||||||||||
| Rear tire | 2.50-19 " | ||||||||||||||||||||||||||||||
| Specifications | |||||||||||||||||||||||||||||||
| Tank capacity | 9 | ||||||||||||||||||||||||||||||
| Maximum load, kg | 150 | ||||||||||||||||||||||||||||||
| Maximum speed, km / h | 80 | ||||||||||||||||||||||||||||||
| Dimensions | |||||||||||||||||||||||||||||||
| Length mm | 1 960 | ||||||||||||||||||||||||||||||
| Width mm | 660 | ||||||||||||||||||||||||||||||
| Height mm | 960 | ||||||||||||||||||||||||||||||
| Motorcycle base, mm | 1 230—1 255 | ||||||||||||||||||||||||||||||
| Ground clearance mm | 135 | ||||||||||||||||||||||||||||||
Content
Device
The M105 motorcycle model is a further development of the previous M104 model.
Engine
The engine is single-cylinder, air-cooled and has a two-channel return blow. Aluminum alloy cylinder head with decompressor .
The engine on the M105 model was finalized: on this model, for the first time, the plant used instead of a cast-iron cast-iron cylinder a cast-iron sleeve embedded in an aluminum cooling jacket, which improved its heat dissipation, work was done to improve performance, the engine received a new modernized K-36M carburetor, and a lower head bearing was used a connecting rod with a separator instead of a bronze bushing, the exhaust system was changed, a new muffler was installed, as a result of which 7 horsepower was obtained. at 5,500 rpm [1] . The engine requires fuel from a mixture of oil and gasoline in a ratio of 1:25.
Transmission
The most important innovation of this model is a four-speed gearbox. The gearshift mechanism is foot. Multi-plate clutch, in oil bath. The drive to the rear wheel is a chain. On this model, the plant first introduced protection of the main transmission chain with stamped covers and rubber chain covers, which increased the life of the chain.
Chassis
The frame is tubular, closed type, reinforced (in relation to M104). Front fork telescopic type with hydraulic shock absorbers, Rear suspension pendulum type with hydraulic shock absorbers.
Electrical equipment
For the first time, a brake light was installed on the new model, as well as a speedometer backlight.
Specifications
| Length mm | 1960 |
| Width mm | 660 |
| Height mm | 960 |
| Base mm | 1 230—1 255 |
| Ground clearance mm | 135 |
| Maximum load, kg | 150 |
| Dry weight kg | 95 |
| Max. speed, km / h | 80 |
| Average fuel consumption, l / 100 km | 3,5-4 |
| Cylinder diameter mm | 52 |
| Piston stroke mm | 58 |
| Engine displacement, cm 3 | 123 |
| Compression ratio | eight |
| Engine power hp | 7 |
| Speed at max. power rpm | 5500 |
| Carburetor | K-36M |
| Air filter | contact oil |
| Fuel | gasoline A-76 |
| Fuel tank capacity, l | 12 |
| Motor gear | Chain PV-9.525-1200 |
| Gear ratio | 2.75 |
| Clutch | multi-disc, oil bath |
| The number of leading drives | four |
| Transmission | 4 speed |
| Gear ratios | I - 3.18, II - 1.97, III - 1.39, IV - 1.00 |
| main gear | closed circuit PR-12,7-1800-2 |
| Gear ratio | 2.67 |
| Wheels (hubs) | stamped |
| Tires | 65-484 (2.50-19 ") |
| Saddle | double type pillow |
| Generator | G-411 |
| Ignition coil | B-300 |
| Ignition timing (mm to TDC) | 3,7 |
| Headlight lamp | 32 × 21 |
| Stop signal | FP-230 |
| Direction indicator | missing |
| Speedometer | SP-115 |
| Signal | S-34 |
| Light switch | P-200 |
Notes
- ↑ Soviet Motorcycles // “Behind the Wheel”: a magazine. - 1970. - No. 1 . - S. 16-17 .