Difference between revisions of "Derbi"

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basic info
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{{TOCright}}
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==Engine Intake Info==
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*'86 and '87 SLE should be a flat reed engine (the flat reed engine came into play in '86)
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**You can tell if it has a steel rear swingarm on a Variant step through, it is a flat reed
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**If it has an alloy rear swingarm, it's piston port or pyramid reed
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*the 81 SLE was pyramid reed
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*Derbi RD's were pyramid reed
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*Derbi Diablos and Lagunas piston port
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*the Derbi DS50 scooter is flat reed
  
"86 and 87 sle should be a flat reed engine, the flat reed engine came into play in 86, you can tell if it has a steel rear swingarm on a variant step thru, it is a flat reed, if its alloy, its piston port or pyramid
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-''quote by well known derbi connoisseur''
  
the 81 sle was pyramid reed, derbi rd’s were pyramid reed, derbi diablos are piston port, derbi lagunas are also piston port, the derbi ds50 scooter is flat reed'
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==Technical Specs==
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===Piston port engines===
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*cylinder inducted
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*stroke: 43mm
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*bore: 38mm
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*displacement: 48.7cc
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*compression 8.5:1
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*direction of rotation: counter clockwise facing magneto
  
quote by well known derbi conoseiour
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===Pyramid reed engines===
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*Pyramid 3-reed valve, Crankcase mounted
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*stroke: 43mm
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*bore: 38mm
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*displacement: 48.6cc
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*compression 8.5:1
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*direction of rotation: counter clockwise facing magneto.
  
technical specs
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===Flat reed engines===
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*Crankcase 2-reed valve induction with triple transfer port distribution
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*stroke: 40mm
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*bore: 39.87mm
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*displacement: 49cc
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*compression: 10:1
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*direction of rotation: clockwise facing magneto.
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*Max engine RPM: 6500
  
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==Make a Water-Cooled Derbi==
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Please see [http://www.mopedarmy.com/forums/discuss/read.php?f=7&i=52675&t=49558 this discussion] from the forums.
  
 
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{{stub}}
Piston port engines
 
cylinder inducted
 
stroke: 43mm
 
bore: 38mm
 
displacement: 48.7cc
 
compression 8.5:1
 
direction of rotation: counter clockwise facing magneto
 
 
 
Pyramid reed engines
 
Pyramid 3-reed valve, Crankcase mounted
 
stroke: 43mm
 
bore: 38mm
 
displacement: 48.6cc
 
compression 8.5:1
 
direction of rotation: counter clockwise facing magneto.
 
 
 
Flat reed engines
 
Crankcase 2-reed valve induction with triple transfer port distribution
 
stroke: 40mm
 
bore: 39.87mm
 
displacement: 49cc
 
compression: 10:1
 
direction of rotation: clockwise facing magneto.
 
Max engine RPM: 6500
 
 
 
 
 
 
 
 
 
makin a water cooled derbi
 
 
 
here is hte link . do not know how to attach to wiki . thermosifon
 
http://www.mopedarmy.com/forums/discuss/read.php?f=7&i=52675&t=49558
 

Revision as of 14:17, 27 November 2008

Engine Intake Info

  • '86 and '87 SLE should be a flat reed engine (the flat reed engine came into play in '86)
    • You can tell if it has a steel rear swingarm on a Variant step through, it is a flat reed
    • If it has an alloy rear swingarm, it's piston port or pyramid reed
  • the 81 SLE was pyramid reed
  • Derbi RD's were pyramid reed
  • Derbi Diablos and Lagunas piston port
  • the Derbi DS50 scooter is flat reed

-quote by well known derbi connoisseur

Technical Specs

Piston port engines

  • cylinder inducted
  • stroke: 43mm
  • bore: 38mm
  • displacement: 48.7cc
  • compression 8.5:1
  • direction of rotation: counter clockwise facing magneto

Pyramid reed engines

  • Pyramid 3-reed valve, Crankcase mounted
  • stroke: 43mm
  • bore: 38mm
  • displacement: 48.6cc
  • compression 8.5:1
  • direction of rotation: counter clockwise facing magneto.

Flat reed engines

  • Crankcase 2-reed valve induction with triple transfer port distribution
  • stroke: 40mm
  • bore: 39.87mm
  • displacement: 49cc
  • compression: 10:1
  • direction of rotation: clockwise facing magneto.
  • Max engine RPM: 6500

Make a Water-Cooled Derbi

Please see this discussion from the forums.

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