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Adventure — middleweight

BMW R65 GS

Factory configuration

Monolever

What changed for 1987 · Monolever

Factory model-year identity
BMW introduced the R 65 GS in 1987 as the 649.6 cc entry model in its twin-cylinder Enduro range. Manufacturer source
BMW R65 GS Monolever — Monolever — 1987–1992
Image: BMW Group Classic — BMW Group Classic

Vitals

Wet weight
198 kg
Fuel capacity
19.5 L
Front tyre
3.00-21
Rear tyre
4.00-18
Tyre pressures
1.9 / 1.8 bar cold solo
Ground clearance
218 mm

Field repair

Fuse box
Main electrical protection is in the headlamp/instrument wiring area; use the motorcycle wiring diagram to identify the affected circuit before replacement
Battery access
Battery beneath the seat; disconnect the negative lead first and reconnect it last

Remove a wheel and repair a tube puncture

  1. 01Secure the motorcycle on its centre stand on firm level ground and support the opposite end so the machine cannot tip.
  2. 02Remove the affected wheel using the documented axle, clamp and brake fasteners; keep spacers and brake parts in installation order.
  3. 03Protect the rim, lift one bead with the carried levers, remove the tube and inspect the tyre carcass, rim tape and valve area before patching or fitting the spare tube.
  4. 04Refit without trapping the tube, inflate in stages, restore the wheel fasteners to the factory torques and prove brake operation before a slow test.

Remove and reinstall a wheel

  1. 01Secure the motorcycle on its centre stand and support the unloaded end so the machine cannot roll or tip.
  2. 02Release the front axle at 44 Nm installation specification or the rear-wheel hardware at 85 Nm, preserving spacers and brake components in order.
  3. 03Inspect bearings, seals, brake components and fastener threads before reassembly; keep the front brake lever untouched while a caliper is removed.
  4. 04Tighten the front axle to 44 Nm, clamps to 14 Nm, caliper to 32 Nm, or rear bolts evenly to 85 Nm.
  5. 05Pump and prove the brake, spin the wheel for clearance and perform a slow controlled test before normal riding.

Diagnose a no-charge condition

  1. 01Turn off non-essential loads and confirm battery terminals and main earth connections are clean and secure.
  2. 02Measure resting battery voltage, then charging voltage at raised idle; do not infer alternator condition from the warning lamp alone.
  3. 03With the battery isolated, use the factory test sequence to check accessible wiring, rotor continuity and diode-board connections.
  4. 04If charging cannot be restored reliably, conserve the remaining battery and recover the motorcycle before ignition voltage is exhausted.

Clear a carburettor fuel obstruction

  1. 01Turn both fuel taps off, cool the engine and keep ignition sources away.
  2. 02Remove the affected carburettor float bowl carefully, retain the gasket and inspect for water, sediment or a stuck float.
  3. 03Clean only removable contamination with fresh fuel; do not force wire through calibrated jets.
  4. 04Refit the bowl, open the taps, check for leakage and recover the motorcycle if the float does not shut off or fuel continues to escape.

Inspect shaft-drive oil loss

  1. 01Stop and secure the motorcycle; clean the final-drive and swingarm area so the source of oil or vibration can be identified.
  2. 02Check rear-wheel play, rotation, boot condition and the final-drive oil level without mixing the gearbox, swingarm and final-drive fill points.
  3. 03Do not continue if there is bearing play, binding, metal in the oil or continuing leakage.
  4. 04Recover the motorcycle for bearing, seal or driveshaft work; these are not safe roadside internal repairs.

Data sheet

Dimensions & weights

Wet weight
198 kg
Ground clearance
218 mm
Wheelbase
1465 mm

Engine & drivetrain

Engine
650 cc · Air-cooled two-valve opposed twin
Cooling
Air cooled
Transmission
5-speed
Final drive
Shaft
Fuelling
Carburettor

Fuel & range

Fuel capacity
19.5 L

Electronics & rider aids

Cruise control
No
ABS
No

Consumables & service specs

Every value carries its source.

Tyres

Rear
4.00-18Tube typeBMW Club R65 GS specifications
Front
3.00-21Tube typeBMW Club R65 GS specifications

Tyre pressures

Front — solo
1.9 bar coldFactory service range rises to 2.2 bar with passenger and luggageBMW R65 GS service data
Front — loaded
2.2 bar coldBMW R65 GS service data
Rear — solo
1.8 bar coldFactory service range rises to 2.3 bar with passenger and luggageBMW R65 GS service data
Rear — loaded
2.3 bar coldBMW R65 GS service data

Wheels

Wheel torque
Front axle 44; axle clamps 14; front brake caliper 32; rear wheel bolts 85 NmRear wheel bolts are tightened evenly on clean, dry threadsBMW R65 GS service data

Engine oil

Viscosity
SAE 20W-50 for normal warm-weather operationUse the factory temperature chart when operating outside the stated viscosity rangeBMW R65 GS service data
Capacity
2.25 L with filterBMW R65 GS service data

Brakes

Transmission

Grade
API GL-5 hypoid gear oil, SAE 90 above 5 °C; SAE 80 below 5 °C; 80W-90 all-seasonBMW R65 GS service data

Final drive

Shaft oil grade
API GL-5 hypoid gear oil, SAE 90 above 5 °C; SAE 80 below 5 °C; 80W-90 all-seasonBMW R65 GS service data
Shaft oil capacity
350 ml final driveSwingarm is a separate 150 ml oil compartmentBMW R65 GS service data

Spark plugs

Type
Bosch W7DC or Beru 14-7DUBMW R65 GS service data
Gap
0.6 ± 0.1 mmBMW R65 GS service data

Fuel

Minimum octane
91 RON minimumBMW R65 GS service data
Fuel type
Unleaded petrolBMW R65 GS service data

Tyre Library

Tyres for this bike and year

Start with this motorcycle’s front and rear sizes. Open a tyre to check the complete fit for this exact bike and year; a size or original-equipment report alone does not confirm it.

Search these sizes

Sizes match, but more needs checking

Continental TKC 70

Matching front and rear sizes exist, but some motorcycle requirements or the front-and-rear pairing still need confirmation.

Still needs checking: source information, load rating, any manufacturer restrictions, front and rear pairing, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Michelin Anakee Adventure

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Michelin Anakee III

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Michelin Anakee Road

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Michelin Anakee Wild

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Pirelli Angel GT

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Pirelli Angel GT II

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Pirelli Angel ST

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Bridgestone BATTLAX Adventure A41

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Bridgestone Battlax Adventure Trail AT41

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Bridgestone BATTLAX Adventurecross Scrambler AX41S

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Bridgestone BATTLAX BT-45

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Bridgestone BATTLAX BT46

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Bridgestone BATTLAX Sport Touring T32

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Bridgestone BATTLAX Sport Touring T33

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Bridgestone BATTLE WING BW501 / BW502

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Bridgestone BATTLECRUISE H50

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Avon Cobra Chrome

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Michelin Commander II

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Michelin Commander III Cruiser

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Michelin Commander III Touring

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Continental ContiClassicAttack

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Continental ContiEscape

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Continental ContiLegend

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Continental ContiMotion

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Continental ContiRoad

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Continental ContiRoadAttack 4

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Continental ContiTour

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Continental ContiTrailAttack 3

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Metzeler Cruisetec

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Pirelli Diablo Powercruiser

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Metzeler Enduro 3 Sahara

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Mitas Enduro Trail-ADV 2

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Mitas Enduro Trail-XT+

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Mitas Enduro Trail+

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Bridgestone EXEDRA G853 / G852

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Bridgestone EXEDRA MAX

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

IRC GP-21F / GP-22R

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Heidenau K60 Scout

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Dunlop K750

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Metzeler Karoo 4

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Metzeler Karoo Street

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Metzeler Lasertec

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Metzeler ME 888 Marathon Ultra

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Pirelli MT 21 Rallycross

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Pirelli MT 60 RS

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Pirelli Night Dragon

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Continental RB 2 / K 112

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Michelin Road 5

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Michelin Road 6

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Michelin Road 6 GT

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Michelin Road Classic

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Michelin Road W GT

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Metzeler Roadtec 01

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Metzeler Roadtec 01 SE

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Metzeler Roadtec 02

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Metzeler Roadtec Z8 Interact

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Michelin Scorcher 11

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Michelin Scorcher 31

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Michelin Scorcher Adventure

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Pirelli Scorpion Rally

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Pirelli Scorpion Rally STR

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Pirelli Scorpion Trail II

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Pirelli Scorpion Trail III

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Avon Spirit ST

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Mitas Terra Force-R

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Continental TKC 70 Rocks

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Continental TKC 80

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Continental TKC 80²

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Metzeler Tourance

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Metzeler Tourance Next 2

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

No matching front and rear pair

Bridgestone Trail Wing TW101 / TW42

No complete front and rear size pair in this tyre range matches the selected bike and year.

Still needs checking: load rating, any manufacturer restrictions, approved rim width, speed rating, a named tyre match.

Does not fit this bike

Bridgestone BATTLAX Adventurecross AX41

The size names match, but one or more complete fit checks fail for this motorcycle.

Still needs checking: source information, load rating, any manufacturer restrictions, front and rear pairing, approved rim width, speed rating, a named tyre match.

What breaks first and where.

01

Transmission output-shaft circlip omission

SeriousOccasional

Some gearboxes produced in this period omitted the output-shaft bearing circlip, allowing bearing movement and progressive internal damage.

Symptoms

  • Increasing transmission whine or roughness
  • Metal debris in drained gearbox oil
  • Abnormal output-shaft end movement found during overhaul

Field repairableNo — Stop if shifting deteriorates, the gearbox becomes noisy or oil contains significant metal. Internal correction requires gearbox removal and specialist work.

02

Charging-system rotor or diode-board failure

SeriousOccasional

The Bosch alternator system can lose charging through rotor open-circuit, diode-board, connection or earthing faults. Confirm with voltage and resistance tests before replacing parts.

Symptoms

  • Charge warning lamp remains lit or glows with engine speed
  • Battery voltage does not rise above resting voltage when the engine is running
  • Intermittent charging after heat or vibration

Field repairableYes — Clean and secure accessible connections and test the rotor and charging voltage. A repeated no-charge condition requires battery-conserving recovery rather than continued riding.

Where to find things

Common locations for jacks, filters, fluids and fuse boxes. Follow the reference link when a picture helps more than words.

Jack + tools

Factory tool roll is carried beneath the seat/side-cover area. Confirm every listed wrench, tubular tool, lever, gauge and driver is present before departure.

Reference

Engine oil dipstick

Engine-oil dipstick and filler are on the right side of the crankcase. Check with the motorcycle level on its centre stand after allowing oil to settle.

Reference

Brake fluid reservoir

Front-brake fluid reservoir is on the right handlebar master cylinder. Keep DOT 4 away from paint and do not ride if the level loss is unexplained.

Reference

Air filter housing

Air-filter housing sits beneath the fuel-tank/upper-engine cover area and feeds both carburettors. Check element sealing before carburettor adjustment.

Reference

Battery

Battery is beneath the seat. Disconnect the negative lead before removing the front engine cover or disturbing charging-system wiring; reconnect it last.

Reference

Gearbox, swingarm and final-drive fill points

Gearbox, oil-filled swingarm and final-drive housing have separate fill points and separate quantities; identify each housing before adding oil.

Reference

Alternator and diode board

Alternator rotor and diode board are behind the front engine cover. Disconnect the battery negative lead before removing that cover to prevent a direct short.

Reference