Yamaha YZF-R1 Specs (1998)
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The following technical specification applies for Yamaha YZF-R1 1998 models. Herein you will find detail information about the sport bike’s engine system (displacement bore x stroke, displacement, compression ration), transmission, dimension, electrical components specs, etc. (source: Yamaha YZF-R1 1998 Service Manual)
DIMENSION
| Overall length | 2,035 mm |
| Overall width | 695 mm |
| Overall height | 1,095 mm |
| Seat height | 815 mm |
| Wheelbase | 1,395 mm |
| Minimum ground clearance | 140 mm |
| Minimum turning radius | 3,400 mm |
| Weight: Wet (with oil and full tank) Dry (without oil and fuel) Maximum load allowed |
198 kg 177 kg 197 kg |
ENGINE
| Engine type | Liquid-cooled, 4-stroke, DOHC |
| Cylinder arrangement | Forward-inclined parallel 4-cylinder |
| Displacement | 998 cm³ |
| Bore x stroke | 74 x 58 mm |
| Compression ratio | 11.8:1 |
| Engine idling speed | 1,050 ~ 1,150 r/min |
| Vacuum pressure at engine idling speed | 29.3 kPa (220 mm Hg) |
| Compression pressure (STD) | 1,450 kPa (14.5 kgf/cm²) at 400 rpm |
| Fuel: Recommended fuel Fuel tank capacity Total (including reserve) Reserve only |
Regular gasoline
18 L |
| Carburetor: Model (manufacturer) Quantity Throttle cable free play |
BDSR40 (Mikuni) 4 3 ~ 5 mm |
OIL
| Lubrication system | Wet sump |
| Recommended oil | SAE20W40SE or SAE10W30SE |
| Quantity Total amount Without oil filter cartridge replacement. With oil filter cartridge replacement. |
3.6 L 2.7 L 2.9 L |
| Oil pressure (hot) | 45 kPa at 1,100 rpm |
| Relief valve opening pressure | 490 ~ 570 kPa (4.9 ~ 5.7 kgf/cm²) |
| Oil filter Oil filter type Bypass valve opening pressure |
Cartridge (paper) 180 ~ 220 kPa (1.8 ~ 2.2 kgf/cm²) |
| Oil pump Oil pump type Inner-rotor-to-outer-rotor- tip clearance. Outer-rotor-to-oil-pump- housing clearance. |
Trochoidal 0.09 ~ 0.15 mm 0.03 ~ 0.08 mm |
COOLING SYSTEM
| Radiator capacity | 2.55 L |
| Radiator cap opening pressure | 95 ~ 125 kPa (0.95 ~ 1.25 kgf/cm²) |
| Radiator core width height depth |
340 mm 298 mm 24 mm |
| Coolant reservoir capacity | 24 mm |
| Water pump Water pump type Reduction ratio |
Single-suction centrifugal pump 68/43 x 28/28 (1.581) |
STARTING SYSTEM
| Type | Electric starter |
| Spark plugs Model (manufacturer) Quantity Spark plug gap |
CR9E/U27ESR-N (NGK/DENSO) 4 0.7 ~ 0.8 mm |
TRANSMISSION and FRAME
| Transmission type | Constant mesh, 6-speed |
| Primary reduction system | Spur gear |
| Primary reduction ratio | 68/43 (1.581) |
| Secondary reduction system | Chain drive |
| Secondary reduction ratio | 43/16 (2.688) |
| Operation | Left foot operation |
| Gear ratio: 1st 2nd 3rd 4th 5th 6th |
39/15 (2.600) 35/19 (1.842) 30/20 (1.500) 28/21 (1.333) 30/25 (1.200) 29/26 (1.115) |
| Frame type | Diamond |
| Caster angle | 24º |
| Trail | 92 mm |
TIRE, SUSPENSION and BRAKE
| Tire type | Tubeless |
| Tire size: Front Rear |
120/70 ZR17 (58W) 190/50 ZR17 (73W) |
| Brake type: Front Rear |
Dual-disc Single-disc |
| Suspension: Front Rear |
Telescopic fork Swingarm (link suspension) |
| Shock absorber: Front Rear |
Coil spring/ Oil damper Coil spring/ Gas-oil damper |
| Wheel type | Cast wheel |
| Wheel travel: Front Rear |
120 mm (4.7 in) 120 mm (4.7 in) |
ELECTRICAL
| Ignition system | T.C.I (digital) |
| Ignition timing | 5° BTDC at 1,100 r/min |
| Advanced timing | 55° BTDC at 5,000 r/min |
| Advancer type | Throttle position sensor and electrical |
| Pickup coil resistance/color | 248 ~ 372 Ohm / Gy–B |
| Transistorized coil ignition unit model (manufacturer) | TNDF41 (DENSO) |
| Ignition coils: Model (manufacturer) Minimum ignition spark gap Primary coil resistance Secondary coil resistance |
JO313 (DENSO) 6 mm 1.87 ~ 2.53 Ohm 12 ~ 18 kOhm |
| Charging system | AC magneto |
| Battery type | GT12B-4 |
| Battery capacity | 12V / 10AH |
| Headlight type | Halogen bulb |
| Bulb (voltage/wattage x quantity): Headlight Auxiliary light Tail/brake light Turn signal light Meter light |
12 V 60 W / 55 W x 2 12 V 5 W x 2 12 V 5 W / 21 W x 2 12 V 21 W x 4 12 V 1.4 W x 4 |
| Fuses (amperage x quantity): Main fuse Headlight fuse Signaling system fuse Ignition fuse Radiator fan fuse Backup fuse (odometer) |
30 A x 1 20 A x 1 20 A x 1 15 A x 1 7.5 A x 1 7.5 A x 1 |
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