902 BIG BORE KIT (SUPPLY ONLY) TO FIT 790 AND 865 ENGINES FROM 2001-2015

If you wish to arrange for the cylinder barrel machining to be carried out yourself the kit is supplied complete with full instructions. Contact us if you require further details.

As our American cousins like to say ‘there is no substitute for cubes’ If you want get some extra performance from your Bonneville, this is the way to go. This top quality kit is the result of a collaboration between ourselves & WISECO Inc. of USA. Torque is raised by 50% & power by 40%! (790CC ENGINES) The increased torque at low revs means that the bike really pulls well, whilst the power increase means that it keeps pulling right to the rev. limiter! So whether you just want improved throttle response for easy riding or whether you want extra power at the top end-this is the favourite way to get there. Kit consists of pistons, liners, gaskets etc.

Power and torque figures are gains on 790cc engines.