High Compression Piston Kit for 790-865cc Air-Cooled Engines


Bonneville Performance offers these Wiseco 90mm pistons, at 12:1 compression for the Triumph Bonneville Twin air-cooled 790-865cc engines. As an option, we can send you the pistons fitted with exchange cylinders, if you send us your cylinders in exchange. 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.



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.

Additional information


Just the Piston Kit, Exchange my Cylinders


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