System 80 Speed Limiter

The System 80 is AutoKontrol’s flagship mechanical speed limiter — the most widely deployed cable-throttle speed control device in the commercial vehicle sector worldwide. Engineered for simplicity, built for durability, and trusted by fleet operators in over 50 countries for more than 40 years.

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How the System 80 Works

The System 80 operates on a purely mechanical principle. A precision-engineered linkage is installed between the vehicle’s accelerator pedal and the throttle body (or fuel injection pump), physically limiting the maximum travel of the throttle cable. When the vehicle reaches the preset speed limit, the System 80 prevents further throttle opening — the driver cannot exceed the set speed regardless of pedal pressure.

Unlike electronic speed limiters that rely on software, CAN bus signals, or engine ECU communication, the System 80 has zero electronic dependency. There is no software to crash, no firmware to update, no battery to replace, and no CAN bus compatibility to worry about. It works on day one and continues working for the life of the vehicle.

The speed limit is set during installation using a calibrated adjustment mechanism, then sealed with a tamper-evident seal. The set speed cannot be changed without breaking the seal — providing a visible, physical deterrent to tampering that enforcement officers can verify at a glance.

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Why Choose the System 80

Unmatched Reliability

With no electronic components, the System 80 is immune to the electrical failures, water ingress, vibration damage, and software glitches that can affect electronic speed limiters. It operates in extreme heat, extreme cold, dust, and wet conditions without degradation. This makes it the preferred choice for vehicles operating in harsh environments — construction sites, quarries, mines, agricultural land, and developing markets with limited technical support infrastructure.

The Simplest Installation

A trained installer can fit a System 80 in under 90 minutes on most vehicles. The installation requires no specialist diagnostic equipment, no laptop, no CAN bus configuration, and no ECU programming. The unit is installed inline with the existing throttle cable — a straightforward mechanical procedure that any competent vehicle technician can perform.

Lowest Total Cost of Ownership

No firmware updates. No annual software licences. No calibration drift requiring recalibration visits. No battery replacements. The System 80’s maintenance requirement is limited to periodic inspection of the cable linkage and tamper seal — typically aligned with the vehicle’s existing service schedule. For fleet operators managing hundreds or thousands of vehicles across multiple countries, this simplicity translates directly into lower operating costs.

Globally Certified

The System 80 is type-approved under EU/ECE Regulation R89 and holds certifications from UTAC (France), TÜV (Germany), and VCA (United Kingdom). These approvals are recognised by enforcement agencies across Europe, the Middle East, Africa, and Asia — making the System 80 a single product that can be deployed across an international fleet without requiring different hardware for different territories.

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Technical Specifications

Specification	Detail
Operating Principle	Mechanical throttle cable restriction
Throttle Type	Bowden cable (mechanical)
Speed Setting Range	20–120 km/h (adjustable at installation)
Speed Accuracy	± 1 km/h at set speed
Power Supply	None required (purely mechanical)
Operating Temperature	-40°C to +85°C
Tamper Protection	Tamper-evident seal with unique serial number
Certifications	EU/ECE R89, UTAC, TÜV, VCA
Mounting	Inline with existing throttle cable
Typical Installation Time	60–90 minutes
Warranty	2 years manufacturer’s warranty
Designed & Manufactured	Chorley, Lancashire, UK

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Installation Process

1. Vehicle Survey

Our approved installer assesses the vehicle’s throttle system, cable routing, and mounting points. A speed test confirms the vehicle’s unrestricted top speed and identifies the optimal limiter position.

2. Unit Fitting

The System 80 is installed inline with the throttle cable. The unit’s mounting bracket is secured to the vehicle chassis or bulkhead. The throttle cable is routed through the System 80’s precision adjustment mechanism.

3. Speed Calibration

The installer sets the maximum speed using the System 80’s calibrated adjustment screw. The vehicle is road-tested to verify the set speed matches the required limit (typically 56 mph / 90 km/h for UK HGVs).

4. Sealing & Certification

A tamper-evident seal with a unique serial number is applied. The installer issues a speed limiter certificate confirming the set speed, seal number, vehicle registration, and date of installation. This certificate is required for DVSA compliance checks.

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Who Uses the System 80

The System 80 is the speed limiter of choice for:

• Developing market fleets where electronic infrastructure and diagnostic support are limited
• Construction and plant vehicles operating in harsh, dusty, or wet environments where electronics are vulnerable
• Older commercial vehicles with cable-throttle systems that predate CAN bus technology
• Agricultural vehicles required to comply with speed limits on public roads
• Budget-conscious fleet operators who need reliable speed compliance without the cost of electronic systems
• Mixed fleets where some vehicles have cable throttles and others have electronic — the System 80 covers the mechanical side while the DBW covers the electronic side

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Frequently Asked Questions

Can the System 80 be fitted to any vehicle?

The System 80 is designed for vehicles with traditional Bowden cable throttle systems. If your vehicle has a cable connecting the accelerator pedal to the throttle body or injection pump, the System 80 is compatible. For vehicles with electronic (drive-by-wire) throttle, see our DBW Speed Limiter.

How tamper-proof is the System 80?

The System 80 uses a physical tamper-evident seal. Unlike electronic systems where tampering may be invisible, any attempt to modify or bypass the System 80 requires breaking the seal — which is immediately visible to enforcement officers, MOT testers, and fleet managers during routine inspections.

What maintenance does the System 80 require?

Minimal. Periodic inspection of the cable linkage, mounting bracket, and tamper seal — typically during scheduled vehicle servicing. There are no batteries, software updates, or electronic components to maintain.

Is the System 80 still relevant for modern fleets?

Absolutely. While new vehicles increasingly use electronic throttle systems, millions of cable-throttle vehicles remain in active service worldwide — particularly in construction, agriculture, developing markets, and older fleet vehicles. The System 80 remains the most cost-effective, reliable solution for these vehicles.