Fork Spring Pre-load Adjusters for Triumph Twins


Upgrade your none adjustable 41mm forks to pre-load adjustable forks with the addition of this simple to install kit.  You get two (2) pre-load adjustable fork caps, finished in your choice of silver or black hard anodizing.

Adjusting the fork’s pre-load compensates for the weight of the rider, the rider’s riding position (leaning forward or back) and the “feel” of the front suspension of rough roads.

The adjustment bolts are screwed in-and-out to add pressure to the fork spring or remove it to get the right balance to optimize load handling, weight transfer and tire contact patch.

Please note that the stock fork spring spacers must be trimmed in length to compensate for the taller adjustable fork caps.  Alternatively, new spacers can be made from PVC pipe.


41mm fork pre-load adjusters.

Your choice of Silver or Black hard anodized aluminum.

Includes o-rings

Fits all models of Hinckley Triumph twins with 41mm forks:

790cc/865cc Oil Cooled Models:

-Standard Bonneville

-Bonneville T100


-Bonneville SE




900cc/1200cc Water Cooled Models

-Bonneville T100

-Street Twin/Cup

-Bobber (with 41mm forks/single rotor)

Will not fit water-cooled T120, Thruxton or Bobber with 43mm forks/dual rotors.

Your stock spring spacers will need to be trimmed to length.