The MBX80 was developed in response to licensing laws across several countries in the 1980s, where riders were restricted to machines of a certain engine capacity. In the UK, learner riders were limited to bikes up to 125cc and 12hp. The unrestricted 11hp MBX80 delivered performance close to that of larger, restricted 125cc machines, while benefiting from a free-revving engine housed in a lightweight chassis. Combined with a lower insurance premium, this made it particularly appealing to younger riders.
Honda also recognised that riders aged 16–18 would benefit from a larger chassis compared to both the outgoing MB-8 model and its main competitors, the Kawasaki AR80 and Yamaha RD80LC. Period sales literature described the bike as having a “full-sized frame.” While that may be a slight exaggeration, it was certainly a better fit for taller riders.
In terms of specification, Honda had a clear edge over the competition. The MBX80 featured a liquid-cooled, single-cylinder two-stroke engine with a reed valve, 12-volt electrics, and a balance shaft to reduce vibration. Suspension came in the form of Honda’s “Pro-Link” monoshock system, while braking was handled by twin hydraulic discs at the front. A handlebar fairing and belly pan completed the package, giving the bike the look and feel of a much larger machine.
However, this came at a cost. At £699 (1983 prices), the MBX80 was significantly more expensive than its rivals: the Kawasaki AR80 (£529), Yamaha RD80LC (£646), and Yamaha RD80MX (£557).
The UK-specific model carried the code FWD-D and was notable for its twin front disc brakes, unlike the single-disc European model (SWD-D). This setup included two single-piston sliding calipers and a matching lever-operated master cylinder. The UK version was initially available only in black or white. However, there are reports of a small number of second-generation “rainbow” colour schemes being sold in the UK with twin discs carrying the code FWD-F —something I have had confirmed by a Honda dealer.
Here is what Honda said....
The highest specification yet on an 80cc machine.
Honda’s MBX 80 offers similar performance to that of restricted 125’s, but provides economies in running costs and insurance, especially for the young enthusiast. Add to that big bike style, size and feel, and you know you’re riding a winner.
Liquid cooled, high performance engine.
Packed with innovations and race proven high technology, this power-house supplies maximum output any time, all the time. Extremes of temperature make not the slightest difference to the even high output thanks to pressure fed liquid cooling. Efficient exhaust port, CD ignition and a vibration-reducing balancer keep it running as sweet as a nut.
PRO-LINK Rear Suspension.
Honda’s unique way of offering ride comfort combined with high-speed cornering precision. Single damper system gives soft damping at low damper piston speeds and gets progressively harder as damper is compressed. No compromise necessary.
Twin-Hydraulic front disc.
Maximum stopping power is provided by twin-hydraulic front discs with dual piston callipers that also give precise rider feedback. The front brakes are well balanced with dependable leading/ trailing drum at the rear.
Big Bike size and style.
The full-size frame and wheels are perfectly complemented by sleekly styled, flow-though tank, side cover and rear tailpiece. Full instrumentation is enclosed within an aerodynamic bikini fairing and the under cowling completes the fully integrated design. There’s a big bike feel as well as big bike looks, helped by no maintenance ComStar wheels.
MBX 80FWD-D Specifications
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Engine
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79cc, Liquid cooled 2-stoke single
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Bore & Stroke
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49.5 x 41.4mm
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Compression ratio
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7.3:1
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Max. Horsepower
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11.5PS/ 8000rpm (DIN)
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Ignition
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Capacitor Discharge
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Transmission
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6-speed
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Starter
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Primary Kick
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Dimensions (LxWxH)
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1970 x 675 x 1110mm
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Wheelbase
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1250mm
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Seat Height
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780mm
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Ground clearance
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150mm
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Dry weight
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95kg
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Frame
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Semi-double cradle
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Suspension Front
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Telescopic fork, 115mm travel
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Suspension Rear
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Pro-Link, box section swing arm/ 85mm axle travel
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Wheels
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New ComStar
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Tyre Front
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2.75 - 18 - 4PR
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Tyre Rear
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3.00 - 18 - 6PR
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Brake Front
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Twin Hydraulic disc with dual piston callipers
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Brake Rear
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Drum
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Fuel Tank Capacity
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12 lit inc 1.2 lit reserve
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Colours
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Black or White
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