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yamaha xs 850 (1978)




when talking yamaha,  xs is probably one of the best, in the opinion of motorcycle enthusiasts, there are similaritieswith yamaha xs harley davidson. this bike is very famous throughout the world. spesification of yamaha xs 850 :


service information :

Front Fork Oil cc (right leg):200
Front Fork Oil cc (left leg):200
Valve Clearance Cold - Inlet:0.16-0.20
Valve Clearance Cold - Exhaust:0.21-0.25
Tyre Pressure Front Bar / psi:26 psi (1.8 bar)
Tyre Pressure Back Bar / psi:28 psi (2.0 bar)
Tyre Pressure Front - Pillion Bar / psi:28 psi (2.0 bar)
Tyre Pressure Back - Pillion Bar / psi:32 psi (2.3 bar)
Transmission oil quantity:375 cc
Transmission oil:SAE 80 HP
Final Drive grade:SAE 80 HP
Final Drive quantity:300 cc
Engine Oil Grade SAE:20w-40(+60F),10W-30(-60f)
Engine Oil Grade SAE:20w-40
Engine Oil Classification API:SE
Engine Oil quantity with filter (litres):3.33
Engine Oil quantity with filter (litres):3.1
Engine Oil quantity with filter (litres):3.7
Engine Oil quantity (litres):2.8
Idle Speed (rpm):1,050-1,150 rpm
Spark Plugs Gap (mm):0.7-0.8mm
2 Stroke Tank - Litres:15.5
Float Height:12.5 +/- 1mm
Valve Adjustment Interval:6,000 miles (10,000 kms)


brakes :

FrontTwin Disc
Front-Pistons-per-caliper1
RearDisc
Rear-Pistons-per-caliper1
Brake fluidDOT 3 or 4
dimension :

Length2155 mm
Width680 mm
Height1160 mm
Wheelbase1465 mm
Rake36* 30`
Trail107mm (4.21 in)
Wet Weight236 kgs
Dry Weight211 kgs
Fuel Capacity5.3 Imp. gals. (24 L)
Reserve Fuel Capacity1 Imp. gals. (4.5 L)
electrics :

Voltage12v
Spark PlugsNGK BP7ES
Bulb-Headlight55w - 60w H4
BatteryYB14L
engine:

TypeAir Cooled 4 Stroke DOHC Inline Triple
Bore x Stroke71.5 x 68.6 mm
Compression Ratio9.2:1
Displacement826 cc
No. of Valves6
Valve TrainBucket tappets with shims. Chain drive
Lubrication SystemWet Sump
StartingElectric only
Air FiltrationDry Element
CarburationHitachi HSC34
Carburation Main Jet142
Carburation Idle Jet40
Fuel Minimum Octane Rating85
Red line RPM9000 rpm
transmission :

Gear Ratio 1st2.286 : 1
Gear Ratio 2nd1.588 : 1
Gear Ratio 3rd1.300 : 1
Gear Ratio 4th1.095 : 1
Gear Ratio 5th0.957 : 1
Clutch TypeWet multiplate
Final DriveShaft
Primary DriveHy-Vo Chain
Primary Drive Ratio1.667 : 1
Gearchange Pattern1 N 2 3 4 5
Transmission5 Speed
power :

Top Speed121MPH
Max Power Output79 bhp 58.9 kw

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