They are the same ... also the same as HD Sportster. I have the non locking cap on my 2018 T120 - no need for the locking cap, it is a nuisance to use, and the non locking cap looks more 'retro' or authentic to me.
Well that's what I thought, so I bought a pop-up cap for a Sportster, but it will only make about 1 complete turn before it jams, as though maybe the thread is a very slightly different pitch.
I'll take it along to a local bike night tomorrow and see if I can persuade other Triumph and HD owners to do a comparison.
The plot thickens. The cap I bought fits aircooled Bonnies and also fits new Sportsters. In fact it fits almost anything except my sodding bike. Hey ho. Strangely I think the one I need is one that fits an 82-95 Harley.
I'm probably going to spend lots of money on cheapo caps in my attempt to save a few quid. Story of my life LOL.
A forum community dedicated to Triumph Motorcycle owners and enthusiasts. Come join the discussion about performance, racing, cafe racers, bobbers, riding, modifications, troubleshooting, maintenance, and more!