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S&S Big Bore Kit for Enfield 650 Twins

Item: 397835

$741.56 – $782.96

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S&S Big Bore Kit for Enfield 650 Twins


Complete kit with everything you need to get more power out of your Royal Enfield 650 twin cylinder engine.

  • Each kit includes:
    • Cylinder sleeves
      • Requires boring to complete installation
    • Pistons
    • Head gasket
    • Instructions
  • 750cc kit increase bore and stroke to 83.5mm x 67.8mm
  • 865cc Increases bore and stroke to 90mm x 67.8mm
  • Bumps compression ratio to 11.0:1
  • Made in the USA

Product Note: Requires boring of stock cylinders to complete installation.

Specification Details
Bore Varies (make selection above)
Compression Ratio 11.0:1
Country of Origin USA
Displacement Varies (make selection above)
Stroke 67.8 mm
Warranty 1 Year Manufacturer Warranty

Vehicle Fitment


Fitment is guaranteed or your money back plus free return shipping.
Don’t waste time installing a product that doesn't fit. We worked hard ensuring that this product is an exact fit on the vehicles listed below.

Royal Enfield
  • Continental GT 650 2019-2022
  • INT650 2020-2022

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