stock moto cr125 low eng bog

This topic has 3 replies, 2 voices, and was last updated 9 years, 2 months ago by Matt Martin.

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- June 13, 2017 at 5:03 am #82670
  
  Matt Martin
  Participant
  
  from: http://www.swedetechracing.com/techinfo/?cid=62373
  
  PLUGS
  Standard Size – NGK BR10EG or R7376-10
  Shorty Style – NGK R7282-10
  Must use the NGK TRS1225 Plug cap with short style plugs
  ** You must use a resistor type spark plug **
  Spark Plug Gap – 0.024” – 0.028”
  Oil
  
  JETTING
  The Stock Moto Engine for karting application will not run properly run on pump fuel. SwedeTech recommends the use of VP Racing Fuel’s C12 product.
  Keihin 38mm PWM – recommended by SwedeTech
  Jetting range is based on Sprint Kart setup using the SwedeTech GFS system and a 2001 cylinder combo.
  
  170-190 main ( center of the carb, 6mm hex )
  Main jet supplies fuel from ½ throttle to full throttle
  58-65 pilot ( next to main jet, use 5mm flat screwdriver to remove )
  Pilot jet supplies fuel from 0 – ¼ throttle
  DGH needle – 3rd from top. Experiment with 4th & 2nd clip from top.
  Needle regulates fuel from 1/8 throttle to ¾ throttle
  Air Screw ( side of carburetor body, above fuel inlet ) – 1 Turn
  Keihin 2001 CR125 Jet Kits
  * For new engines purchased directly from SwedeTech and engines maintained by SwedeTech, we offer a jet chart to help customers tune their engine for optimum performance.
- June 13, 2017 at 1:01 pm #82708
  
  Dennis DeYoung
  Participant
  
  I followed exactly the same set up but it still bog tho
- June 14, 2017 at 4:43 am #82723
  
  Matt Martin
  Participant
  
  what’s the condition of the reeds?
  
  what does the plug look like?
  
  what fuel are you running?
  
  what gearing?
  
  how many hours on the motor since the last rebuild?
  
  what type of fuel system are you running (pump-around?)
  
  is the spark-plug wire new?
  
  any cracks in fuel lines?
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