BIGBORE KIT 865cc to convert 650 Interceptor + 650 Continental GT. Supplied with ready machined cylinder barrels

BIGBORE KIT 865cc to convert 650 Interceptor + 650 Continental GT. Supplied with ready machined cylinder barrels

This is the big bore conversion by S&S Cycle ready fitted in to a set of cylinder. It converts the 650cc twins to 865cc by taking the standard 78mm bore to 90mm whilst raising the compression ration from 9.5:1 to 11:1

This is a bolt on set of machined cylinder barrels with matched pistons ready to fit.

A great improvement to both torque and horsepower

Before fitting the bigbore kit you should look at replacing the front exhaust pipes and silencers for a less restrictive version.

With fitment of this kit, the fueling will need to be controlled, we recommend the use of a Dynojet Power Commander in which we can supply a suitable base map. 

To maximize the benefit of the bigbore kit you need to consider the following:
Clutch upgrade
Performance Camshaft
Free flow exhaust system
Air Filter Retainer

We would also recommend replacing the 8 cylinder head bolts, part number 575620.