Motor manual

2012 BMW G650GS Sertao

•   BMW Motorrad ABS (disengageable) including hazard warning flashers.
• Heated grips.*
• Alarm system DWA.* 
• Charging socket.* 

2012 BMW G650GS Sertao

• Capacity cc 652
• Bore/stroke mm 100/83 
• Output kW/hp 35/48 at speed rpm 6 500 
• Torque Nm 60 at speed rpm 5 000 
• Type Water-cooled single-cylinder 4 stroke engine 
• Compression/fuel 11.5:1 / regular lead free (91 RON) 
• Valve actuation DOHC (double overhead camshaft), Bucket tappets 
• Valves per cylinder 4 
• Ø intake/outlet mm 36/31 
• Throttle valve diameter mm 43 
• Carburetion BMS-C II 
• Emmission control Fully controlled three-way catalytic converter
  

• Alternator W 400
• Battery V/Ah 12/12 
• Headlight High-/Low beam: Halogen 12 V/55 W 
• Rear light Brake light: 12V/21W, rear light: 12V/5W 
• Starter kW 0.9 
• Gearbox power transmissions
• Clutch Multiple clutch in oil bath, mechanically controlled 
• Gearbox Constant mesh 5-speed gearbox
• Primary ratio 1.946
• Gear transmission ratio I 2.750
• II 1.750
• III 1.313
• IV 1.045
• V 0.875
• Rear wheel drive: chain
• Transmission ratio 2.937

• Frame construction type: Steel bridge frame with rear frame bolted on
• Suspension, front: Telescopic fork with stabiliser
• Suspension, rear: Double boxed swing arm of steel sections, spring strut actuated via central rocker system spring travel front/rear mm: 210/210
• Wheel castor mm: 123
• Wheelbase mm: 1484
• Steering head angle 61.9°

• Brakes front Hydraulically actuated single disc brake, fully floating, 300 mm diameter, double piston floating calliper
• Brakes rear Hydraulically actuated single disc brake, 240 mm diameter, single piston floating calliper,

• BMW Motorrad ABS, disengageable (special equipment)

• Front 2.50 x 21“
• Rear  3.00 x 17“

• front 90/90 R21 54S
• rear 130/80 R17 65S

• Total length mm: 2185mm
• Total width with mirrors: 920 mm
• Seat height (without rider): 860 (standard) 900 (special accessory: high seat) mm
• DIN unladen weight, ready for road: 193kg
• Permitted total weight 380kg
• Fuel tank level 14l

• 90 km/h : 3.2 L/100 km
• 120 km/h: 4.3 L/100 km
• Acceleration: 0–100 km/h: 5.7s
• Max speed: 170km/h

Still the names with 2 alphabets and two digits intermingled looked kind of odd and so in the mid-1920s, the references to the number of cylinders and model series were abandoned, so the M4A1 would become a M1. Now the only entry in front of the project number was to denote an engine (‘M’ for Motor), transmission (‘G’ for Getriebe), frame for motorcycles (‘R’ for Rahmen) or chassis for cars (‘F’ for Fahrgestell).
And this was how the first ever BMW motorcycle got its name. The frame for the new bike was given the project number ‘R 32’ when it was entered into the project list. The engine was initially christened ‘M2B33’ (Motor 2 cylinder B series Project 33), later shortened to ‘M33’. The transmission used in the motorcycle bore the designation ‘G 34’. The internal project number for the frame construction saw the motorcycle unveiled with the official sales designation ‘BMW R 32’. Initially, all the brand’s motorcycles were issued with their name according to this system, a product of the design organization. In the public use, the ‘R’ stands for ‘Rad’, a short name for Motorrad (motorcycle) at this time.

Later BMW (obviously) started using the same frame for many different models with different engine variant. This development meant that the sales designation for the models could no longer be based on the project numbers for the frames. The ‘R’ was retained, but was now followed by a two-digit number that differed from the design designation. A newer concept was thought about with single-cylinder machines single-digit sales designations while the two-cylinder units two-digit designations and it was hastily introduced.

With the expansion of manufacturers, in 1933, to simplify the naming, the Reich Air Ministry apportioned fixed numbering systems to its various engine manufacturers. BMW was given the range between 100 and 199. Likewise motorcycles were given the range from 200 to 299 and cars the 300-to-399 band. The existing motorcycle models were integrated into the new system and so the ‘R 32’ became the ‘232’. But later, during the mid 30s, the sales designations traditionally used for motorcycles were retained, the nomenclature for the models reflected, as a rule, the engine displacement. For example, the 500cc boxer unit was named the BMW ‘R 5’ and its successor the BMW ‘R 51’.
Even for the boxer engines, BMW retained the familiar designation ‘R’ (followed by a number denoting the engine capacity). Other alphabets were added-on abbreviations, which also described the bike further, like G meaning Gelände for off-road and S meaning Strasse for on-road, GS for Geländesport meaning off-road sport and RT for Reisetourer meaning tourer.
For the in-line engines, a totally separate designation K was adopted. In pattern with the boxer models or the R, the K was followed by a number derived from the engine displacement. BMW followed the same pattern with the single-cylinder machine that first went on sale in 1993. This model series was given the designation F, referring to the Funduro concept. More recently, the new generation of lightweight single-cylinder machines presented in 2006 took on the letter ‘G’. As such currently BMW has the R, K, F and G series.