Fork emulators and adaptors for Triumph 41mm forks


CNC Fork Emulator Valves with Adaptor Rings-

This brand new pair of fork Emulators/adaptors will fit all years and models of Air cooled and Water-cooled Triumph Hinckley Bonneville, 1200 Bobber, T100, Street Twin, Street Scrambler, America , Speedmaster, Scrambler and 900cc Thruxton.

They will not fit 1200cc- T120, Thruxton and Thruxton R.

These valves are made for us by YSS and are top quality.  The adaptor rings are exclusive to TEC.

The 41mm Triumph forks fitted to the Bonneville/classic twin range are renowned for poor damping and harshness over sharp bumps. These valves totally transform the damping to the level of cartridge type forks and allow separate compression and rebound damping settings. More importantly they add a high speed damping valve to allow forks to compress faster over severe bumps without compromising normal damping performance.

IMPORTANT- Several companies including suspension specialist sell these YSS valves without the TEC Triumph adaptors. It is very important to only use these with the adaptors as the will not work correctly without them and the valves may also be damaged.

Can be used with our progressive fork springs and fork top adjusters to give a vastly improved front end set up that is fully adjustable for damping and pre-load /ride height.

The kit features:-

  • A pair of High quality YSS wear resistant black anodised finish emulator valves.
  • A pair of TEC Triumph 41mm fork adaptor rings.
  • They can be fitted by most competent home mechanics , please watch our video see link below.
  • Allows damping to be fully adjustable with separate adjustment to rebound, high and low speed compression damping.
  • Allows easy fine adjustment of the front forks and allows you to upgrade your forks up to cartridge fork spec at a fraction of the price.
  • Full technical and warranty back up from a long established UK family company.

Fitting video:


Customer Reviews

Based on 34 reviews
Craig Pierce
Cartridge emulators

As ever excellent service, parts work like a dream. I,ve had full exhaust system, shocks and now fork upgrade. All have helped transform the Bonneville. Can,t recommend TEC enough.

Rob (North Wales)
Se emulators

Fed up with the poor triumph front suspension I previously fitted the progressive springs which made a slight improvement but the action was still very poor.
Decided on the emulators as they had made a reasonable difference to a friends America.
Instructions could be a little clearer and there needs to be a bit of actual setting information if you want to adjust the emulator.
But. The improvement in performance is amazing on the SE.
basically the suspension now works.
My bike may need a little more preload but that’s a minor issue.
Beware. The bolts holding the sliders were very tight and I needed to use an impact gun with the forks compressed with a ratchet strap.
A definite mod to all SEs.


Just to say thanks for the quick delivery, cheers Keith.

SE Emulator

Transformative. There are certain things that MUST be done to Bonnevilles and this is one of them. Washboard roads were causing my forks to go solid. When you look at the video you understand why. This absoloutely fixed that problem. It suggests you cut down the internal tube as well but I didnt. This has given me the perfect amount of pre load for my weight. 95kg. Thanks Tec.

Andrew G
Great service

Parts were well packaged and arrived in good time. Great that there is a YouTube channel to help with fitting and that Tec went to the trouble of testing the parts and then adding 2 plastic rings to ensure the parts work...which a.n.other suspension specialist does not supply/even know they are required