High Compression Piston Kit for 1200cc Liquid-Cooled Engines


Bonneville Performance offers these Wiseco 97.6mm pistons, at 12.5:1 compression for the 2016+ Triumph Bonneville, liquid-cooled, 1200cc engines used in the T120, Thruxton, Bobber, Scrambler and Speed Twin models. All shipping is USPS 2-Day Priority Mail. Use the Contact Form to email us about international shipping costs and options.


This Bonneville Performance/Wiseco High Performance 97.6mm 12.5:1 piston kit for the 2016 and later 1200cc water cooled twins requires the following engine modifications and components to maximize performance:

  • BP/Wiseco Piston Kit
  • BP High Performance Head ported with 3 angle valve job, 10,500 rpm valve components from Ferrea - base locators, spring sets, retainers and locks

Engine building services are available

  • We charge a $750.00 flat rate for top end builds and $1500.00 for crankshaft up builds plus shipping costs (shipping costs depend on the distance and service you use) if you ship us your engine to rebuild to the specifications you have ordered.


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