Published Jun 18, 2019 by Michael Le Pard
Back to yamaha Motorcycle Specs Index Page
– 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 |
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| 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 |
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|
|
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 |
|
|
| Coils (Owner Replacement): |
Secomdary Winding Resistance = 12k |
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|
|
(2) Dynatek DC1-1, 12Volt, Dual Angled Output, Wasted Spark |
|
Primary Winding Resistance = 3.0 |
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|
|
Secomdary Winding Resistance = 14k |
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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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