New vehicle certification documents from the California Air Resources Board and the U.S. Environmental Protection Agency confirm two new Triumph models sharing the Street Twin‘s 900cc engine. The government agencies officially certified two new models for 2017, a new Bonneville T100 and a new model to be called the Street Cup.

We may have already seen the Bonneville T100, at least in pre-production form (pictured above). Those spy photos, snapped outside Triumph’s headquarters in the U.K., show a bike that looks similar to the recently-introduced Bonneville T120, but with the smaller engine from the Street Twin.

The Street Cup is more of a mystery. Triumph typically likes to pull model names from its 130-plus year history, especially with its “modern classic” models. The “Street” part maintains that tie to tradition, but “Cup” would be a new entry to Triumph’s nomenclature. “Cup” may suggest a racing variant (Triumph has in the past operated a Street Triple Cup and the American Historic Racing Motorcycle Association still runs a Thruxton Cup Challenge), or perhaps a cafe racer version of the Street Twin. If you really want to stretch your imagination, another possibility is a touring version (i.e. the “Cup” being a smaller “Trophy“).


The certification documents confirm the engine will be the same 900cc parallel-Twin engine introduced on the Street Twin, EPA-rated at 54 hp at 5900 rpm and tested by us at its rear wheel at 52.6 hp and 57.8 lb-ft of torque. The only difference, noted by both the EPA and CARB, is an increase in carbon monoxide emissions in the 2017 engine compared to the 2016 Street Twin’s powerplant. The 2017 engine is rated at producing 2.7 g/km of CO, up from the 2016-certified 2.0 g/km, but still well below the CARB and EPA standard of 12 g/km.

Retro Roadster Gaiternational Shootout

We expect to hear more information in the months ahead, with an official announcement to come at this fall’s Intermot or EICMA shows (if not sooner). As always, will have the latest, so keep checking this space!

  • JMDonald

    They can make a chicks bike and call it the D cup.

    • Old MOron

      What do we have to do to get a rise out of the lady MOrons?

      • JMDonald

        DickRubble is a comment section construct.

        • Old MOron

          Anything is possible. I don’t care. I generally enjoy his posts.

          • JMDonald

            His posts have been some of the best. Question being, is he a real person? I guess he is.

          • DickRuble

            From reliable sources close to the subject, I am being told I am just an advanced experimental spell, syntax, and semantics checker financed by DARPA and broadcasting from Area 51.

  • Old MOron

    The by line says “admin,” but this to be Dennis. Nice one, Dennis. I saw two Street Twins at my local dealership. They had handsome bikes.

    • denchung

      Oops, right you are!

  • Sentinel

    If they ever put the Thruxton engine in a T120 with rims that do not require tubes I’ll be first in line to buy one, but until then, I’m not really interested in any of them.

  • Old MOron

    Since we’re talking about Bonneville-type bikes, I want to offer up a PSA.

    In his review, T-rod said, that Triumph said, that the new Thruxton and Thruxton R are already sold out through July:

    But only yesterday I saw a new Thruxton R on the showroom floor at Thousand Oaks Powersports, If you want it, go and get it!

    • Kevin Duke

      Sold out at the dealer level…

      • Old MOron

        I’m a moron.

        • Bruce Allen

          Ssssshhhh. Le Mans preview up at Don’t let Dennis see this.

    • Gabriel Owens

      Try finding a Husqvarna 701 supermoto.

      • Old MOron

        I’ve been trying for six months!

  • Starmag

    Love it or hate it, Triumph seems to be making the financially smart move of creating many models out of the engine of their most popular bike. Harley has used this formula to sell 260,000 high profit bikes every year since time began. I like retro/timeless, ( but not cruisers/chopper wanna be’s), and don’t need performance excesses,(but still want some power/ground clearance), so I think it’s great. Some more Thruxton motor variants would be cool also. Looking into my crystal ball, it’s likely I will own one of these variants in the future.

    • Old MOron

      Yup, a little power, a lot of ground clearance, let’s ride!

  • Agro Rider

    An increase in CO, could be an increase in throttle body size or number

  • papagrune123

    I have a question. With the 2017 Street Twin and Bonneville T100 seem to be the gauge package. Multi function Speedo and Speedometer and Tachometer. Is there more to it than that. Same Engine, ABS on both, Fly by wire. any thing else. Makes me think of the Triumph Bonneville S and SE SE gets a Tach.,