Market Segment:
Off-road / Trials Motorcycle
Brand Positioning:
Beta motorcycles are known for their specialization in trials and enduro riding, emphasizing performance and durability.
Competitors:
Montesa, Gas Gas, Fantic, Sherco (during the era)
Feature 1:
Specialized off-road design for trials competition.
Feature 2:
Likely a robust and torquey engine tuned for low-speed control.
Feature 3:
Focus on lightweight construction and agile handling for technical terrain.
Manual Type:
Parts List / Parts Catalog
Coverage Scope:
Front to back components for all repairs
Intended User:
Garages, workshops, owners
Page Count:
Undisclosed (estimated 100-200 pages for a comprehensive parts list)
Format:
Digital (assumed, as product is sent)
File Format:
Likely PDF or similar digital format, optimized for digital delivery.
Print Quality:
High-resolution diagrams suitable for printing specific pages for workshop use.
Binding Type:
N/A (Digital)
Paper Type:
N/A (Digital)
Engine Components:
Cylinder head, cylinder block, pistons, connecting rods, crankshaft, camshaft, valve train, cooling system, lubrication system, ignition system, carburetor system, exhaust system
Transmission Components:
Gearbox internals, clutch assembly, shift mechanism, drive chains
Chassis Components:
Frame, subframe, swingarm, suspension (front forks, rear shock absorber), steering system, wheels, brakes (front and rear calipers, master cylinders, discs, pads), footpegs, controls
Electrical Components:
Wiring harness, lighting, ignition coil, stator, rectifier, battery components (if applicable)
Bodywork Components:
Fuel tank, seat, fenders (front and rear), number plates, airbox, linkages, levers, cables
Procedure Type:
Parts identification and ordering
Procedure Details:
Each component will have a corresponding part number, diagram reference, and potentially quantity and application notes.
Depth:
Component-level breakdown for parts procurement and identification
Displacement:
Likely 240cc and 260cc variants, as indicated by model name.
Cooling System:
Air-cooled (typical for trials bikes of this era)
Horsepower Estimate:
Estimated 20-25 HP (typical for 240-260cc 2-stroke trials bikes of the late 80s)
Torque Estimate:
Optimized for low-end torque for precise control.
Carburetor:
Likely a single carburetor, possibly Dell'Orto or Mikuni, sized appropriately for the displacement.
Fuel Type:
Leaded or Unleaded gasoline with 2-stroke oil mix (ratio typically 50:1 or 40:1 depending on oil quality)
Wheelbase:
Specific to trials bike geometry, likely around 1300-1350 mm
Seat Height:
Designed for rider maneuverability, likely moderate.
Dry Weight:
Likely under 80 kg (176 lbs) for optimal trials performance.
Fuel Tank Capacity:
Typically 2-3 liters for trials bikes, emphasizing agility over range.
Spark Plug Replacement:
Check and clean every 5-10 hours, replace as needed.
Air Filter Cleaning:
Clean after every ride or as conditions dictate.
Chain Lubrication Tension:
Lubricate and check tension before every ride.
Gearbox Oil Change:
Recommended every 20-30 hours of use.
Gearbox Oil Type:
Typically SAE 10W/40 or SAE 80W motorcycle-specific gear oil.
Fork Oil Type:
Specific fork oil viscosity, e.g., Showa SS-8 or similar, check manual for exact type and level.
Coolant:
N/A (Air-cooled engine)
Common Issue 1:
Carburetor jetting sensitivity to altitude and temperature changes.
Common Issue 2:
Wear on clutch plates due to aggressive trials riding.
Common Issue 3:
Fork seal leaks common in off-road applications.
Common Issue 4:
Potential for exhaust system damage due to impacts.
Brand Origin:
Beta Motorcycles is an Italian manufacturer founded in 1905, known for its off-road motorcycles.
Model Lineage:
The TR series represented Beta's dedicated trials bike line, evolving through various engine sizes and chassis refinements.
Era Context:
The late 1980s was a period of significant development in trials bike technology, with manufacturers focusing on lighter frames, improved suspension, and more potent, controllable engines.
Production Location:
Italy
