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Triumph Scrambler 900

Base20122013
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Triumph Scrambler 900 Base — 2012
Image: Triumph Media Website — null

Vitals

Wet weight
230 kg
Seat height
825 mm
Fuel capacity
16 L
Real world range
290 km
Front tyre
100/90-19
Rear tyre
130/80-17
Tyre pressures
2.07 / 2.82 bar solo
TerrainTarmacGravel — easy

Field repair

Fuse box
Behind the right-hand side cover
Fuses
11
Battery access
Remove seat (seat release via Allen key stored beneath the left-hand side panel on the Scrambler variant)

Aftermarket voltage regulator/rectifier upgrade (charging system reliability fix)

  1. 01Locate the OEM shunt-type regulator/rectifier (typically mounted under the seat or behind a side panel on the Bonneville-family chassis).
  2. 02Disconnect the battery negative terminal before beginning work.
  3. 03Disconnect the wiring harness connector(s) from the OEM regulator/rectifier unit.
  4. 04Remove the OEM unit from its mounting bracket.
  5. 05Install the aftermarket series-type regulator/rectifier (e.g., Rick's Motorsport Electrics unit) in the same mounting location, using an appropriate bracket/adapter if the aftermarket unit's shape differs.
  6. 06Reconnect the wiring harness, ensuring correct polarity and secure, corrosion-free connections.
  7. 07Reconnect the battery and start the motorcycle; verify charging voltage at the battery terminals is within the normal range (typically ~13.5-14.8V) at idle and at higher RPM.
  8. 08Inspect the stator and its wiring for any signs of prior heat damage; if the stator shows melted insulation or burnt windings, it must be replaced separately as the regulator upgrade alone will not fix pre-existing stator damage.

Data sheet

Dimensions & weights

Wet weight
230 kg
Seat height
825 mm
Wheelbase
1500 mm
Suspension travel
120 / 120 mm

Engine & drivetrain

Engine
865 cc · Parallel twin
Cooling
Air cooled
Output
54 hp · 68 Nm
Transmission
5-speed
Final drive
Chain
Fuelling
Electronic fuel injection

Fuel & range

Fuel capacity
16 L
Real world range
290 km

Electronics & rider aids

Ride modes
None
Cruise control
No
Traction control
No
ABS
Yes
Heated grips
No
Heated seat
No

Service intervals

Service interval
10,000 km
Valve check
20,000 km

Protection

Bash plate
None
Radiator guard
No
Oil cooler guard
No
Hand guards
No

Consumables & service specs

Every value carries its source.

Tyres

Front
100/90-19Bridgestone TW101, spoked wheel requiring tube-type tyre. Carried forward from the 2009 edition-3 Bonneville-family manual; corroborated by motorcyclistonline.com's 2012 reviewTriumph OM Bonneville-family (English) · official
Rear
130/80-17Bridgestone TW42, spoked wheel requiring tube-type tyre. Carried forward from the 2009 edition-3 Bonneville-family manual; corroborated by motorcyclistonline.com's 2012 reviewTriumph OM Bonneville-family (English) · official

Tyre pressures

Front — solo
2.07 bar30 psi cold, solo rider; carried forward from the 2009 edition-3 Bonneville-family manual (asset.moto.it hosted PDF) — no distinct 2012-specific manual found, but corroborated as unchanged by motorcyclistonline.com's 2012-specific reviewTriumph OM Bonneville-family (English) · official
Rear — solo
2.82 bar41 psi cold, solo rider; carried forward from the 2009 edition-3 Bonneville-family manual — no distinct 2012-specific manual foundTriumph OM Bonneville-family (English) · official
Front — loaded
2.07 barManual states same value for solo and laden/maximum-load front pressure; carried forward from the 2009 edition-3 manualTriumph OM Bonneville-family (English) · official
Rear — loaded
2.82 barManual states same value for solo and laden/maximum-load rear pressure; carried forward from the 2009 edition-3 manualTriumph OM Bonneville-family (English) · official

Engine oil

Viscosity
Semi or fully synthetic 10W/40 or 10W/50, API SH (or higher) + JASO MACarried forward from the 2009 edition-3 Bonneville-family manualTriumph OM Bonneville-family (English) · official
Capacity
3.8 lOil and filter change quantity (dry fill 4.5L; oil-only change without filter 3.3L). Carried forward from the 2009 edition-3 manualTriumph OM Bonneville-family (English) · official

Brakes

Fluid type
DOT 4Carried forward from the 2009 edition-3 Bonneville-family manualTriumph OM Bonneville-family (English) · official

Final drive

Chain
DID 525 VM2, 104 links, endless typeCarried forward from the 2009 edition-3 Bonneville-family manual (Scrambler-specific row); corroborated by motorcyclistonline.com's 2012 review confirming X-ring chain final driveTriumph OM Bonneville-family (English) · official

Spark plugs

Type
NGK DPR8EA-9Carried forward from the 2009 edition-3 Bonneville-family manualTriumph OM Bonneville-family (English) · official
Gap
0.8-0.9 mmCarried forward from the 2009 edition-3 Bonneville-family manualTriumph OM Bonneville-family (English) · official
Quantity
2Parallel-twin engine, one plug per cylinder (inferred from engine architecture; not explicitly restated as a quantity figure in the manual excerpt)Triumph OM Bonneville-family (English) · official

Battery

Type
12V 10AhCarried forward from the 2009 edition-3 Bonneville-family manualTriumph OM Bonneville-family (English) · official

Fuel

Minimum octane
91 RON minimumCarried forward from the 2009 edition-3 Bonneville-family manualTriumph OM Bonneville-family (English) · official

What breaks first and where.

01

Voltage regulator/rectifier failure (endemic on air-cooled Bonneville-platform twins)

ModerateWidespread

The OEM shunt-type voltage regulator/rectifier on air-cooled Bonneville-family twins (including the Scrambler variant sharing the same 865cc engine and charging system architecture) is widely reported by the owner community to overheat under sustained load, degrade, and eventually fail. In its early failure stages this can overheat and damage the stator windings (melting coil insulation, eventually shorting to ground), compounding the repair. Community sources describe this as a frequent issue especially on pre-2012/2013-era Triumph twins, with 'Rick's Motorsport Electrics' aftermarket regulator/rectifier upgrades being a common owner remedy. No formal NHTSA recall was identified for this issue on the Scrambler specifically — this is dealer/owner-community documented rather than a safety recall.

Symptoms

  • Dimming or flickering instrument lights/clock display
  • Battery fails to hold charge / drains while riding
  • Engine stalls and will not restart (no crank response)
  • Burnt or discolored stator wiring on inspection
  • Charging system voltage reading low or erratic at the battery terminals

Field repairableYes — Common owner-community remedy is replacing the OEM shunt-type regulator/rectifier with an aftermarket series-type unit (e.g., Rick's Motorsport Electrics) which runs cooler and is less prone to the same failure mode; if the stator has already been damaged by an overheating regulator, the stator itself must also be replaced.

TriumphRat Stator/Regulator Failure Thread
02

Engine oil cooler line weep/leak

MinorOccasional

Owners of air-cooled Bonneville-family twins (865cc engine shared with the Scrambler) report oil seepage/weeping at the external oil cooler lines and their banjo-bolt fittings over time, attributed to fitting seals hardening/degrading with age and heat cycling. Aftermarket replacement oil cooler line kits are sold specifically to address this as a known wear point on the platform.

Symptoms

  • Oil spots/stains found under the parked motorcycle near the oil cooler lines
  • Visible oil residue on the external oil cooler lines or their fittings
  • Gradual oil level drop between service intervals

Field repairableYes — Tightening or replacing the oil cooler line banjo-bolt sealing washers is often sufficient for minor weeps; persistent leaks are commonly resolved with an aftermarket oil cooler line kit replacement.

TheTriumphForum Scrambler Oil Leak Thread