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History of the Yellow Box

Version 1  
The Yellow Box v1 was designed in 1998 and only suited the Suzuki
motorcycle speedo systems. Designed for high reliability and accuracy
the Yellow Box soon earned a reputation as the rugged speedo recalibrator.

Version 2  
With the popularity of the original Yellow Box speedo recalibrator we
soon received enquiries from owners of other bikes and cars wanting a
product that suited their vehicles. During that redesign, the Yellow Box v2
shrunk to 2.5 x 1.8 inches and strengthened its place as the world's
smallest and most rugged speedo recalibrator.

Version 3  
During 2001 we produced an even smaller and lighter Yellow Box v3.
The v3 product also gained a speed improvement and two versions were
released; bike and car models. A special kph-mph conversion mode was
added to provide mph conversion for imported vehicles. Like all the
Yellow Box models the v3 has the flashing light feature and special
test modes.

Version 4  
After seven years of producing the worlds premier speedo recalibrator it was
time for a bit of a facelift. Our new custom styled, super compact design
made the Yellow Box v4 even smaller and lighter than the v3.

All of our long-trusted reliability and ruggedness features are continued
in the v4. It also now includes an inbuilt extra strong mounting hole and
additional strength support around the connector plug.

Performance improvements include a wider correction range and a new
output test mode. The Yellow Box v4 also provides both kph-mph and
mph-kph conversion for imported vehicles or when travelling.


Built for reliability
The Yellow Box Speedo Recalibrator is engineered to last. We have such
confidence in the performance and longevity of the Yellow Box that we
offer a 10 year replacement guarantee.

We take extra care so that every Yellow Box lives up to our reputation
for excellent reliability;

  • hand inspected and computer tested at many stages
  • epoxy encapsulated for shock proofing
  • rugged spike filtering of power and inputs
  • high performance electronic components
  • all parts over-rated by a large margin
  • gold plated switch contacts
  • double tensioned connectors


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