• Chinese Scooter Parts, Chinese Scooter Big Valve Head
  • Chinese Scooter Racing Parts Performance Big Valve Head
  • Head is Used on Bore Sizes 47mm, 50mm & 52mm
  • Fits the 139QMB & 1P39QMB Engines With a 64mm Valve Length
  • If you need the matching Rocker Arms we have them Available
  • Intake Valve 23mm, Exhaust Valve 20mm
  • Stock Valves are 18.5mm & 16mm
  • Already Have a Big Bore Kit then up grade today to a Big Valve Head
  • Don’t Settle for a Big Bore Kit with a small valve head, get the most out of your engine with this Head
  • Looking for Complete Big Bore Kits Visit My Ebay Store for the Best Selection Available 
  • Head is Completely Assembled Ready to Install
  • Be Sure & Check out my Ebay Store for more Big Bore Kits & Performance Racing Scooter Parts
  • Free Shipping & In Stock in The USA

    Click Here to See More BIG BORE Kits


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All Parts are in Stock & Ship from the USA in One Business Day

Same Day Shipping Monday through Friday On Most Orders Received by 3 pm Eastern Time