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 36 reviews
David Abrahams
Transformed the ride

I was hoping for some improvement in the feel of the bike (2017 Triumph Street Twin) but was delighted with the actual result. Much more comfortable and less tiring to ride. I set the emulator spring to two turns of compression and used Motul 10W fork oil and retained the standard springs. The bike has also lost its tendency to "fall" into corners although this may be more due to getting the preload set correctly. I had to make a tool before I could remove the damper bolts and also to allow me to re-torque them on re-assembly - see pic.
I think a few simple instructions would be useful with the package.

Paul Biddulph
Front Suspension kit

I would firstly like to say what great service I received from Tec Parts. My order was taken and delivered in 5 days from the UK to Perth Western Australia. The emulators are a simple poppet type valve at a good price. I fitted the full kit, progressive springs and preload adjusters. I cut down the spacer by 25mm so I could fine tune the bike/rider sag for my weight. The fitting and damper modifications can be found on Tec Parts YouTube channel as fitting instructions don't come with the YSS emulators. I recommend the the full kit which comes at a great price and the great service from Tec Bike Parts

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.