R65GS specification differences
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BMW R 65 GS
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restricted
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unrestricted
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R80G/S
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Engine
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| Motor Type |
4 stroke, 2 cylinder, horizontally opposed “Boxer” engine, aircooled
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| Bore x Stroke |
82 x 61,5 mm
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84,8 x 70,6 mm
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| Cubic Capacity |
649,6 cm3
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797,5 cm3
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| Cylinder heads |
R45?
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R65
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R75/5, R80
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| Pistons |
81,96mm E=8,4
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81,96mm E=8,7
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84,76mm
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| Exhaust valves |
32mm
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36mm
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38mm
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| Inlet valves |
34mm
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40mm
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42mm
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| Max Power |
27HP (20KW) at 5500rpm
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48HP (35KW) at 7200rpm
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50HP (37KW) at 6,500rpm
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| Max Torque |
43Nm at 3500 rpm
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52Nm at 5300rpm
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56,7 Nm at 5,000rpm
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| Compression Ratio |
8,4 : 1
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9,2 : 1
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8,2 : 1
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| Valves per cylinder |
2
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| Valve control |
ohv, using push rod and rocker arm
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| Camshaft |
256 degrees
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308 degrees
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308 degrees
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| Carburation system |
2 constant depression carburettors, Bing V 64
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26mm 317-318
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32mm 359-360
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32mm 349-350
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| Main jet |
102
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130
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135
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| Engine lubrication |
wet sump
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Power transmission
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| Clutch |
dry single plate, with lever-action diaphragm spring
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| Number of gears |
5
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| Gear Selection |
dog-type gearbox (ratchet foot lever)
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| Gear ratios |
4,4 / 2,86 / 2,07 / 1,67 / 1,50 :1
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| Rear wheel ratio |
1 : 3,44
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1 : 3,36
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1 : 3,36
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| Bevel / Crownwheel |
9 : 31 teeth
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11 : 37 teeth
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11 : 37 teeth
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Electrical system
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| Ignition |
Contact-free electronic ignition (Bosch)
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| Alternator |
Bosch 280 W
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| Starter |
Bosch 0.7 kW
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| Sparkplugs |
Bosch W7DC, Beru 14-7DU, Champion N9YC, NGK BP(R)6ES
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| Alternative Sparkplugs |
NGK Iridium BPR6EIX, BP6EY, Denso Iridium IW20, Splitfire SF6D
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Chassis
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| Type of frame |
double-loop tubular frame with bolt-on rear section
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| Front suspension |
telescopic fork with hydraulic shock absorber
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| Rear suspension |
BMW Monolever swinging arm
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| Spring travel front / rear |
200 / 170 mm
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| Rim front |
1.85 B 21
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| Rim rear |
2.15 B 18
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| Tyres front |
3.00-21 48 R
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| Tyres rear |
4.00-18 64 R
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| Brakes front |
single disc brake 260 mm dia
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| Brakes rear |
simplex drum brake 200 mm dia
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Dimensions / weights
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| Lengt x Width x Height |
2230 x 820 x 1150 mm
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| Wheel base |
1465 mm
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| Tank capacity |
19,5 ltr
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| Weight empty |
186kg
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| Unladen weight, full tank |
198kg
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| Max permissible weight |
398kg
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| Ground clearance |
218mm
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175mm
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| Fuel consumption |
5,0 L / 100km (at 90km/h)
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5,0 L / 100km (at 90km/h)
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| Top speed |
146km/h
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165km/h
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168km/h
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| Acceleration 0-100km/h |
9,4 sec
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7,1 sec
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5,6 sec
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