| ITEM | SPECIFICATIONS |
| V50N (UA04J) | V80N | T90D (4NM) |
| DIMENSIONS | Overall length | 1,845mm | 1,840mm | <---- |
| Overall width | 665mm | 660mm | 775mm |
| Overall height | 1,030mm | 1,035mm | 1,080mm |
| Wheelbase | 1,175mm | 1,170mm | 1,195mm |
| Seat height | 740mm | 745mm | 740mm |
| Ground clearance | 140mm | <---- | 135mm |
| Dry weight | 90kg | 88kg | 95kg |
| Curb weight | 95kg | 93kg | 99kg |
| Seating | 1 | <---- | <---- |
| ENGINE | Model | A121E | V80 | 4GL |
| Total displacement | 49cc | 79cc | 89cc |
| Type | Air cooled Single, 2-cycle engine | Air cooled Single, 4-cycle engine |
| Valbe | Crank case reed valbe | 2 valbe |
| Starting system | Kickstarter (primary kick) |
| Bore&stroke | 40.0X39.7mm | 47.0X45.6mm | 47.0X51.8mm |
| Compression ratio | 6.6:1 | 6.3:1 | 8.5:1 |
| Maximum power | 3.5kw(4.7PS)/6,000rpm | 4.9kw(6.7PS)/6,000rpm | 4.8kw(6.5PS)/7,000rpm |
| Maximum torque | 5.9Nm(0.6kg-m)/5,000rpm | 8.0Nm(0.8kg-m)/4,500rpm | 7.5Nm(0.8kg-m)/5,500rpm |
| Ignition | CDI | <---- | <---- |
| Lubrication | Separate lubrication (YAMAHA Autolube system) | Wet sump |
| Oil capacity | 0.65lit (Gear oil) | 1.0lit |
| Fuel capacity | 4.8lit(reserve 0.4lit) | 5.3lit(reserve 0.4lit) | 5.2lit(reserve 0.4lit) |
| Fuel expenses | 94km/L(30km/h) | 72km/L(50km/h) | 54km/L(60km/h) |
| Drive Train | Drive system | Chain |
| Clutch | Wet multiple disc Automatic centrifugal clutch |
| Transmission | 3-speed rotary | 3-speed return |
| Primary reduction | 3.578(68/19) | 3.142(66/21) | ? |
| Gear ratio I | 3.250(39/12) | <---- | 2.153(28/13) |
| Gear ratio II | 1.812(29/16) | <---- | 1.933(29/15) |
| Gear ratio III | 1.200(24/20) | <---- | 1.173(27/23) |
| Final reduction | 3.416(41/12) | 2.846(37/13) | 2.333(35/15) |
| FRAME | Type | Pressed back-bone, steel |
| Front suspension | Bottom link, coil spring/oil damper | Telescopic fork |
| Rear suspension | Swing arm, coil spring/oil damper |
| Front tire | 2.25-17 33L Tube | <---- | 2.75-14 35P |
| Rear tire | 2.25-17 38L Tube | 2.50-17 43L Tube | 2.75-14 41P |
| Brake | Drum leading/trailing front&rear |
| ELECTRICAL | Alternator | Flywheel magneto |
| Battery capacity/Type | 12V 2.5Ah(10h)/YT4B-BS | 12V 2.5Ah(10h)/GT4B-5 | 12V 3.2Ah(10h)/GT4L-BS |
| PRICE | 180,000yen | 182,000yen | 230,000yen |
