650cc to 865cc Big Bore Kit. Fits Royal Enfield 650 Twins 2019up - S&S

Features & Benefits:-

* This kit, when paired with an S&S Cam & exhaust totally changes the ride of the RE650 for the better. Transform your bike into a much more fun & exhilarating ride!

* Bore x Stroke: 90mm x 67.8mm (retains stock stroke)

* 11:1 compression ratio (stock is 9.5:1)

* Complete kits include cylinders, pistons, and head gasket

Suggested Additional Purchase:

* S&S Cam # SS330-0709

* S&S Exhaust # SS550-1031 or Mufflers # SS550-0770

* S&S Air Cleaner # SS170-0601 & Eliminator Plate # SS170-0603

* We Strongly advise that you upgrade your clutch to a Rekluse TorqDrive Clutch #

RMS-2813001

Tech Tips:-

* Ring gap & Piston to Cylinder Clearance should be checked.

* Re-Calibration of Ignition Timing & Fuel Mixture is required.