100cc (50mm BORE) UPGRADE KIT (#2) FOR QMB139 MOTORS

TRUE DISPLACEMENT: *81.3cc WITH STOCK CRANK*

PEOPLE REFER TO THIS KIT AS 100cc

 

THIS KIT IS TO UPGRADE YOUR STOCK 50cc QMB139 

MOTOR AND TURN IT INTO A 81.3 / 100cc MOTOR

ADDING MORE POWER FOR BETTER PERFORMANCE 

 

KIT INCLUDES:

• CYLINDER BODY : 50mm 
• CYLINDER HEAD (VALVES INSTALLED): NON EGR *69mm VALVES*
• TOP AND BOTTOM GASKETS, PISTON AND PISTON RINGS SET
• WRIST PIN, CIR CLIPS

• 50mm INSIDE DIAMETER
• CYLINDER GASKET GY6 50cc
• 
  
• CYLINDER BORE: 50mm
• 
  
• CYLINDER HEAD:
• 
  
• NON-EGR STYLE CYLINDER HEAD
• 50MM BORE
• VALVE LENGTH: 69mm
• OVERALL HEIGHT: 59.5mm
•  INTAKE PORT DIAMETER: 17mm
• EXHAUST PORT DIAMETER: 18mm
• EXHAUST BOLT HOLE SPACING: 49.75mm
• INTAKE BOLT HOLE SPACING: 44.75mm 
 

*PLEASE LOOK AT PHOTOS PROVIDED* 

FITS MANY MODELS LIKE 

TAO MOTORS, JONWAY, JMSTAR, ROKETA, 

SUNL, TANK, PEACE, TAOTAO, GATOR

AND MANY OTHERS

 

*PLEASE BE SURE THAT YOUR OLD PART IS 69mm VALVE LENGTH. 

IF NOT THIS PART WILL NOT WORK FOR YOUR BIKE*

SHIPS FROM SHELBY, NC

M1