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1986 Yamaha XJ750X Maxim

June 18, 2019 Michael Le Pard 1986 Motorcycle Models, Motorcycle 0

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– 1986 Yamaha XJ750X Maxim

MANUFACTURER SPECIFICATIONS

Model Yamaha XJ750X Maxim 1986
Motorcycle Style: Standard

ENGINE SPECS

Engine Type: 4-cylinder In-line, 4-stroke
Cylinder Inclination: Forward 14°
Engine Cooling: Liquid
Displacement XJ750X: 749 cm³ (45.7 cu. in.)
Compression XJ750X: 11:1
Bore x Stroke XJ750X: 68.0 x 51.6 mm (2.6772 x 2.0315 in)
Combustion Chamber Volume: 17.09 cm³ (1.04 cu. in.)
Cam Arrangement: DOHC
Valves – Total: 20 total – 5 per cylinder
Valves – Intakes: (3) 21 mm per cylinder
Valves – Exhausts: (2) 23 mm per cylinder
Spark Plug Type 1986:
 NGK D8EA or Nippon Denso X24ES-U
Carburetors:
NGK DR8ES-L or Nippon Denso X24ESR-U
Lubrication System: 0.6 – 0.7 mm (0.024 – 0.028 in)
(4) Standard side-draft 33 mm Mikuni CV
Wet Sump
Maximum Horsepower XJ750X: 
 67.1 kW (90 hp) @ 9000 rpm (Cycle Canada – Sep ’85)
Maximum Horsepower XJ700X:  64.1 kW (86 hp) @ 9500 rpm (TotalMotorcycle.com)
55.9 kW (75.01 bhp) @ 10000 rpm
Maximum Torque XJ750X:  7.40 kg·m (53.5 ft·lb) @ 8000 rpm (Cycle Canada – Sep ’85)
Maximum Torque XJ700X:  6.90 kg·m (49.9 ft·lb) @ 8000 rpm (TotalMotorcycle.com)
Power/Weight Ratio XJ750X:  0.379 hp/kg
Power/Weight Ratio XJ700X:  0.363 hp/kg
Quarter Mile XJ750X:  11.66 sec at 186.87 km/h (116.15 mph) (Cycle Canada – Sep ’85)
Quarter Mile XJ700X:  11.79 sec at 181.57 km/h (112.82 mph) (Cycle – Apr ’85)
11.779 sec at 182.87 km/h (113.63 mph) (Cycle Guide – May ’85)
Acceleration 0-60mph XJ750X:  less than 3.20 seconds (still looking)
Acceleration 0-60mph XJ700X:  3.20 seconds (Cycle-Apr ’85)
Redline: 10000 rpm
Gas Mileage – Owner Min.: 38.2 mpg (Imp) • 31.8 mpg (US) • 13.5 km/L • 7.4 L/100 km
Gas Mileage – Owner Avg.: 49.4 mpg (Imp) • 41.2 mpg (US) • 17.5 km/L • 5.7 L/100 km
Gas Mileage – Owner Max.: 66.2 mpg (Imp) • 55.1 mpg (US) • 23.5 km/L • 4.3 L/100 km
Dist. to Reserve – Owner Avg.: 145 km (90 miles)
Dist. per Tank – Owner Max.: 210 km (130 miles)

 

Fuel Type: Regular Gasoline
Fuel Type – Owner Preferred: Regular Unleaded 89 – 91 octane without Ethanol
Fuel Capacity – Total: 13 L (2.86 Imp. gal., 3.43 US gal.)
Reserve Capacity (of Ttl): 3 L (0.66 Imp. gal., 0.79 US gal.)
Oil Type: SAE 10W30 (API type SE) or 20W40 (API type SE)
Oil Type – Owner Preferred: 10W40 Fully Synthetic w/20% Lucas Oil Stabilizer
Oil Filter – Original: Yamaha 1L9-13441-11 w/O-ring: 602411(93210-87723)
Oil Filter – Owner Replacement: FRAM CH6003 (supplied w/O-rings)
Oil Filter – Alternate Replacements: K&N KN-144 or WIX 24934 or AMSOIL SMF105
Periodic Oil Change (no filter): 2.5 L (2.20 Imp. qt., 2.6 US qt.)
Oil Capacity (with new filter): 2.8 L (2.46 Imp. qt., 3.0 US qt.)
Total Oil Capacity: 3.5 L (3.08 Imp. qt., 3.7 US qt.)
Radiator Capacity (w/all routes): 2.4 L (2.11 Imp. qt., 2.5 US qt.)
Stock Air Filter: Yamaha Part# 1AA-14451-00-00
High Flow Air Filters: K&N YA-7080 or UNI Foam NU-2283
Final Gear Oil Type: SAE 80API “GL-4” Hypoid Gear Oil
Final Gear Oil Capacity: 0.2 L (0.176 Imp. qt., 0.21 US qt.)
Fork Oil Type: 10Wt Fork Oil
Fork Oil Capacity: 389cm³ (13.7 Imp. oz., 13.2 US oz.) per stanchion
Tire Pressue (Front): 177kPa  /  1.8kg/cm²  /  26psi  [ load below 90kg (198lb) ]
196kPa  /  2.0kg/cm²  /  28psi  [ load 90-238kg (198-525lb) ]
206kPa  /  2.1kg/cm²  /  30psi  [ High Speed Travel ]
Tire Pressue (Rear): 196kPa  /  2.0kg/cm²  /  28psi  [ load below 90kg (198lb) ]
275kPa  /  2.8kg/cm²  /  40psi  [ load 90-238kg (198-525lb) ]
226kPa  /  2.3kg/cm²  /  32psi  [ High Speed Travel ]

MISCELLANEOUS SPECS

Transmission Type: Constant mesh 5-speed
Clutch Type: Wet/multi-disc
Transmission Operation: Left foot shift left [1D-4U]
Primary Reduction System: Spur Gear
Primary Reduction Ratio: 97/58 (1.672)
Secondary Reduction System: Shaft Drive
Secondary Reduction Ratio: 49/36 x 19/18 x 32/11 (4.179)
Gear Ratio – 1st: 35/16 (2.187)
Gear Ratio – 2nd: 30/20 (1.500)
Gear Ratio – 3rd: 30/26 (1.153)
Gear Ratio – 4th: 28/30 (0.933)
Gear Ratio – 5th: 26/32 (0.812)
Chasis / Forks / Suspension
Frame Type: Double Cradle
Caster Angle (aka Rake): 31.5°
Trail: 120 mm (4.7 in)
Suspension Type – Front: Telescopic fork
Shock Absorbers – Front: Air, coil spring, oil damper
Forks – Size: 38 mm stanchion tubes
Forks – Air Pressure: 10 to 17 psi
Wheel Travel – Front: 150 mm (5.9 in)
Suspension Type – Rear: Swing arm
Shock Absorbers – Rear: Coil spring, oil damper
Wheel Travel – Rear: 99 mm (3.9 in)
Wheels / Tires / Brakes
Tire Size – Front: 100/90-19  57H  ( 90 mm depth) [ nothing taller is appropriate ]
*** Note – Front: 110/90-19 ( 99 mm depth) is commonly listed but is too tall & will rub the fender at high speeds
Tire Size – Rear: 130/90-16  67H  (117 mm depth) [ nothing wider will fit, so don’t bother ]
Owner Recommended Tires: V-rated Metzeler Lasertecs
Alt. Owner Recommended Tires: V-rated Dunlop GT501s
Alt. Owner Recommended Tires: V-rated Bridgestone Battlax BT45s
Wheel Size – Front: 2.15″ cast aluminum 5-spoke
Wheel Size – Rear: 16″ cast aluminum hoop
Brakes – Front: Dual discs, right hand lever
Brakes – Rear: Drum, right foot lever
Ignition System: Hitachi TID14-35 TCI
Generator System: Hitachi LD119-19 AC Generator (14V, 26A at 5000rpm  –  364Watt max)
Battery Type/Capacity: Yamaha YB14L/12V  14AmpH
Battery Dimensions (LxWxH): 134mm x 89mm x 167mm (5-5/16″ x 3½” x 6-9/16″)
Replacement Battery Option: YUASA YB14L-A2  12V  14AmpH (Serviceable Lead/Acid)
Owner Recommended Battery: Westco 12V14L-B  12V  14AmpH  190 CCA (Sealed AGM)
Display Indicators: Left/Right/Neutral/Oil/High Beam
Starting System: Electric Starter
Coils (stock): (2) Hitachi CM12-25, 12Volt, Dual Output, Wasted Spark
Primary   Winding   Resistance   = 2.7
 ± 10% at 20°C (68°F)
Coils (Owner Replacement): Secomdary Winding Resistance = 12k
 ± 20% at 20°C (68°F)
(2) Dynatek DC1-1, 12Volt, Dual Angled Output, Wasted Spark
Primary   Winding   Resistance   = 3.0
 ± 10% at 20°C (68°F)
Secomdary Winding Resistance = 14k
 ± 20% at 20°C (68°F)

DIMENSIONS

Overall Length: 2235 mm (88.0 in)
Overall Width: 775 mm (30.5 in)
Overall Height: 1160 mm (45.7 in)
Seat Height: 760 mm (29.9 in)
Wheel Base: 1520 mm (59.8 in)
Min. Ground Clearance: 145 mm (5.7 in)
Min. Turning Radius: 2800 mm (110.2 in)
Wheel Size – Front: MT2.15″x19″ cast aluminum 5-spoke
Wheel Size – Rear: MT3.00″x16″ cast aluminum hoop
Tire Size – Front: 100/90-19  57H  ( 90 mm depth)   [Air pressure in CAPACITIES section below]
Tire Size – Rear: 130/90-16  67H  (117 mm depth)  [Air pressure in CAPACITIES section below]
Wheel Travel – Front: 150 mm (5.9 in)
Wheel Travel – Rear: 99 mm (3.9 in)
Weight
Wet Weight: XJ750X: 237.6 kg (524 lb) with oil, coolant and full tank (as per Cycle Canada – Sep ’85)
Wet Weight: XJ700X: 232 kg (511 lb) with oil and full tank (as per XJ700X Owners’ Manual)
: 234.7 kg (517 lb) with full tank (as per Cycle – Apr ’85)
Dry Weight: 215 kg (474 lb)
Engine Dry Weight: 90 kg (198 lb)

Please note: Total Motorcycle would like to thank Maxim-X  for the above specifications and for Grant J for informing us of this gap in our 1985/86 Yamaha line. We made attempts to contact the webmaster at Maxim-X but all attempts failed. We fear the information at Maxim-X maybe soon lost as their site has not been updated for a long time thus we are trying to save the above information from the internet void. If you are the webmaster for Maxim-X please contact us.

 

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