Hoca 52mm for 50cc QMB139 Performance Big Bore Cylinder Kit
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SSP-G 52mm QMB139 Performance Cylinder Kit

SSP-G 50cc QMB139 4-stroke 52mm, Racing Big Bore Cylinder Set. Kit includes cylinder, piston, rings, piston pin, cir clips, head gasket, and base gasket.

When you use this Hoca 52mm Big Bore Cylinder Set in conjunction with our 44mm Stroker Crankshaft (See Related Items) you will increase your total displacement to 93.4cc, almost doubling your original displacement!!!


We recommend that you use our QMB139 performance cylinder head with this set as some stock cylinder heads will not fit. Use with an un-modified stock head can cause serious engine damage. 

*You may need to modify your engine case to accommodate the larger cylinder.



  • Upgrades to 87.9cc
  • Cylinder Bore: 52mm
  • Cylinder Sleeve Outer Diameter: 54.8mm 
  • Wrist Pin Diameter: 13mm
  • Total Piston Height: 34.8mm
  • Compression Height (from center of wrist pin hole to top edge of piston): 17.25mm

*PLEASE READ ALL BELOW*
 
 
SHIPPING
  • ALL PARTS ARE SHIPPED WITH EVERYTHING LISTED.

RETURNS

  • THERE ARE ABSOUTELY NO RETURNS ON ALL OF OUR RACING PARTS.
  • ONCE YOU PURCHASE ANY RACING PARTS FROM US THEN THEY ARE YOURS.

WARRANTY

  • THERE IS NO WARRANTY ON ANY RACING PARTS.
  • THIS PART SHOULD BE INSTALLED BY A PROFESSIONAL MECHANIC.

    SHIPS FROM SHELBY, NC

Hoca 52mm for 50cc QMB139 Performance Big Bore Cylinder Kit

Price: $119.99
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