High Performance Piston Kit B – with exchange cylinders


Bonneville Performance offers the Wiseco 904cc, 10.5:1 compression 92mm bore piston kit designed for all Triumph powered twins post 2001 for street application. We offer this Option B kit: 904cc Piston Kit with exchange cylinders (supplied by customer). A $72.00 USD Shipping & Handling fee is added at checkout. 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 piston kit requires the following engine modifications and components:

  • BP/Wiseco 904cc Piston Kit
  • Barnett Clutch & Spring Kit
  • Bore & sleeve factory cylinders
  • The rings are file fitted and the pistons are inserted into the cylinders ready to install – just connect the rod end with the wrist pins and insert the outer clips.
  • This kit will produce: 70 – 78 HP and 62 – 66 ft. lbs. of torque*

* NOTE: To optimize the performance of this modification, we recommend a flat-slide carburetor kit, hi-flow head with 1mm over valves and a free-flow exhaust system. See our: Mikuni Flat Side carb kitHigh-Performance Heads and 2 into 1 stainless steel or mild steel exhaust system options.

Engine building services are available

We charge a $500.00 flat rate 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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