| ITEM | SPECIFICATIONS | |||||
| NC25 (NT400J) NC25-1000001~ | NC25 (NT400K,K2) NC25-1050003~ | RC31 (NT650J) RC31-1000001~ | RC31 (NT650K,K2) RC31-1050005~ | |||
| DIMENSIONS | Overall length | 2,060mm | 2,080mm | 2,060mm | 2,080mm | |
| Overall width | 695mm | 725mm | 695mm | 725mm | ||
| Overall height | 1,050mm | 1,060mm | 1,050mm | 1,060mm | ||
| Wheelbase | 1,425mm | <---- | 1,430mm | <---- | ||
| Caster | 27º | <---- | <---- | <---- | ||
| Ground clearance | 155mm | <---- | <---- | <---- | ||
| Dry weight | Total | 164kg | 165kg | 165kg | 166kg | |
| Curb weight | Front | 86kg | 87kg | 87kg | 88kg | |
| Rear | 94kg | <---- | <---- | <---- | ||
| Total | 180kg | 181kg | 181kg | 182kg | ||
| ENGINE | Model | NC25E | <---- | RC31E | <---- | |
| Total displacement | 398cc | <---- | 647cc | <---- | ||
| Type | Liquid cooled twin, 4-stroke SOHC engine | |||||
| Valve | Two intake, One exhaust | |||||
| Cylinder arrangement | 2 Cylinders 52º V | |||||
| Starting system | Electric | |||||
| Bore&stroke | 64.0x62.0mm | <---- | 79.0x66.0mm | <---- | ||
| Compression ratio | 10.0:1 | <---- | 9.4:1 | <---- | ||
| Maximum power | 27.2kw(37PS) /8,500rpm | <---- | 40.4kw(55PS) /7,500rpm | <---- | ||
| Maximum torque | 34.5Nm(3.5kg-m) /6,500rpm | <---- | 56.1Nm(5.7kg-m) /6,500rpm | <---- | ||
| Ignition | Digitalized full transistor | Digitalized full transistor | ||||
| Idle speed | 1,200±100 rpm | |||||
| Lubrication | Wet sump | |||||
| Oil capacity | Total capacity | 2.8lit | ||||
| Filter exchange | 2.3lit | |||||
| Oil exchange | 2.2lit | |||||
| Coolant capacity | Capacity | 2.0lit | ||||
| concentration | 30% | |||||
| Fuel capacity | 12.0lit (reserve 2.0lit) | |||||
| CARBURETION | Carburation | KEIHIN 31mmCVx2 | <---- | KEIHIN 34mmCVx2 | <---- | |
| Identification number | VDF1 | VDFIC | VDG3 | VDG3A | ||
| Pilot screw turns out | 2-1/2 | 2-1/4 | 2-1/2 | 2-7/8 | ||
| Main jet | Front | #140 | #142 | #132 | #138 | |
| Rear | #132 | #135 | #138 | #132 | ||
| Slow jet | #35 | <---- | #42 | <---- | ||
| Float level | 7.0mm | <---- | 9.2mm | <---- | ||
| Jet needle | Can't adjust | |||||
| Fuel pomp capacity | 600cc/min (10V case of over) | |||||
| DRIVE TRAIN | Clutch | Cable operating, multi-plate, wet | ||||
| Transmission | 5-speed | |||||
| Primary reduction | 2.058(34/70) | <---- | 1.763(38/67) | <---- | ||
| Gear ratio | 1st | 3.000(14/42) | <---- | 2.571(14/36) | <---- | |
| 2nd | 2.055(18/37) | <---- | 1.882(17/32) | <---- | ||
| 3rd | 1.590(22/35) | <---- | 1.500(20/30) | <---- | ||
| 4th | 1.318(22/29) | <---- | 1.240(25/31) | <---- | ||
| 5th | 1.130(23/26) | <---- | 1.074(27/29) | <---- | ||
| Final reduction | 2.750(16/44) | <---- | 2.678(16/43) | <---- | ||
| Frame | Type | Twin tube diamond, aluminum | ||||
| Front suspension, travel, | Telescopic fork, 130mm | |||||
| Rear suspension, travel | Swingarm, 120mm | |||||
| Fork innertube diameter | 41mm | |||||
| Fork oil capacity,level | 500cc, 133m | <---- | 502cc, 128mm | <---- | ||
| Tire size | Front | 110/80-17 57H | <---- | <---- | <---- | |
| Rear | 150/70-17 69H | <---- | <---- | <---- | ||
| Tire pressure | Generally | Front 2.25kg/cm², Rear 2.25kg/cm² | ||||
| Tandem | Front 2.25kg/cm², Rear 2.50kg/cm² | |||||
| Brake | Front | Hydraulic single disc, Diameter=320mm | ||||
| Rear | Hydraulic single disc, Diameter=208mm | |||||
| ELECTRICAL | Firing order | Front-(232º)-Rear-(488º)-Front | ||||
| Ignition timing "F" mark | 10ºBTDC/1,200rpm | <---- | <---- | <---- | ||
| Full advance | 32ºBTDC/9,000rpm | <---- | 31ºBTDC/7,000rpm | <---- | ||
| Spark plug | Standard | NGK DPR8EA-9 or DENSO X24EPR-UP | ||||
| For cold climate | NGK DPR7EA-9 or DENSO X22EPR-UP | |||||
| For high speed riding | NGK DPR9EA-9 or DENSO X27EPR-UP | |||||
| Alternator | 12V-240W/5,000rpm | |||||
| Battery capacity | 12V-8Ah MF Battery | |||||