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Is this a two-stroke JAP engine? ( update: 1923 AZA-Prestwich)

Is this a two-stroke JAP engine? ( update: 1923 AZA-Prestwich)

Is this a two-stroke JAP engine? ( update: 1923 AZA-Prestwich)

Is this a two-stroke JAP engine? ( update: 1923 AZA-Prestwich)

Is this a two-stroke JAP engine? ( update: 1923 AZA-Prestwich)

  • Is this a two-stroke JAP engine? ( update: 1923 AZA-Prestwich)
  • Is this a two-stroke JAP engine? ( update: 1923 AZA-Prestwich)
  • Is this a two-stroke JAP engine? ( update: 1923 AZA-Prestwich)
  • Is this a two-stroke JAP engine? ( update: 1923 AZA-Prestwich)



Dr Graham Smith writes: "Can anyone identify this 2 stroke engine? It has a Bing carburettor and ML magneto. It is about 150cc and has a decompression valve on the cylinder head. There is a small circular brass plate on the casting which contains the magneto drive chain which reads, "J A Prestwich" which suggests that it is a JAP, but this may have been added later. Please ignore the bike in which it is fixed as this is one that was made up last year to look like an Indian racer. We would like to find out the age, is it a genuine JAP, and what it was used for. Any information would be much appreciated."
     

Pubblicato:
domenica settembre 13th, 2015

Commenti

Sconosciuto
16 Settembre 2015, 18:25
Many thanks for all the information. At last the mystery is solved.
If any one is brave enough to try to ride the machine down Hexton hill in Plymouth (45deg.) please let me know!
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Sconosciuto
16 Settembre 2015, 02:54
see also the use by Sharratt cycles :
http://www.historywebsite.co.uk/Museum/Transport/Motorcycles/Sharratt.htm
stuart
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Sconosciuto
14 Settembre 2015, 07:46
This is an AZA two stroke engine made by JA Prestwich in Tottenham and announced in August 1923. They were 150cc deflector piston three port two strokes which were intended to get JAP a slice of the low end of the market mainly filled by two strokes which were cheaper to make than fourstrokes. They were not a huge success and were superseded by a small fourstroke engine in 1925. Where the name AZA came from remains a mystery. There is a sectional drawing in Jeff Clew/s excellent book JAP: The Vintage years.
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Sconosciuto
14 Settembre 2015, 06:37
moteur industriel (démarreur ficelle) monté dans une BMA (bicyclette à moteur auxiliaire)
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Sconosciuto
14 Settembre 2015, 03:10
I think the grass in the background is a clue to its original use.
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