has acquired these spy images of two new Triumph prototypes undergoing testing in Spain, and they reveal a new liquid-cooled powerplant that will surely underpin all future Bonnevilles, Thruxtons, Scramblers, etc.

Triumph filed trademarks for the Street Tracker name in October 2012, and here’s the reason why. Looking at the photos, it would be easy to mistake the bike as a revision of a Bonneville or Thruxton, but upon closer inspection you’ll notice a small radiator tucked nicely between the two header pipes – a giveaway to it having liquid-cooling. Up until now, the only twin-cylinder Triumph with a radiator has been the big Thunderbird cruiser.


However, the Street Tracker’s engine appears to be unrelated to its 1700cc brother, as it has many distinct differences. The camshaft caps seen at the top of the T-Bird’s cylinder head are absent on the Street Tracker, and the crankcase/transmission area is narrower and is shaped different. Additionally, each exhaust header seems to angle outward more than on other Triumph Twins, liquid-cooled or otherwise.

The physical size of the motor appears to be larger than the current 865cc air-cooled lump, so it will likely have a displacement upward of 1000cc, perhaps as much as 1200cc. The advantages of liquid-cooling should allow a state of tune that delivers horsepower ratings around 100 ponies.


Like the T-Bird’s mill, the new Trumpet lump has fins on its cylinders, which evokes a vintage-esque air-cooled appearance. However, the Tracker’s fins extend further down its cylinders and may actually be for more than show. It’s possible the new Twin uses both air and liquid to shed heat, similar in concept to Harley-Davidson’s recent Twin-Cooled powerplant. Lending credence to this theory is a radiator that looks to be too small and thin to chill a 1200cc engine on its own.


The Street Tracker carries forward the elemental lines of the current Thruxtons with their bar-end mounted mirrors, wire wheels and a larger version of its reverse-megaphone mufflers. Front brakes change from a single-disc setup to a dual-disc combo. The standard Street Tracker is equipped with conventional forks, fork gaiters, standard brakes and twin shocks that don’t appear to have much adjustability.

Meanwhile, the up-spec model likely to be called the Street Tracker R model benefits from adjustable Ohlins suspension pieces at both ends. Brakes are also upgraded, with twin radially mounted Brembo four-piston calipers. ABS will come standard on both models to comply with European regulations.


The prototypes in these photos appear to be nearly ready for production, so we expect to see an official announcement of the Street Tracker and Street Tracker R in 2015. Considering the expense of creating a new, bigger and more powerful engine, the Street Tracker’s price will probably be significantly higher than the Thruxton’s current $9,099 base MSRP. It wouldn’t surprise us if it retailed for in the $11,000 price range, with the R version carrying a premium of approximately $2,000. If so, that would peg it nicely between the Ducati Scrambler and BMW’s R nineT.

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  • JWaller

    Okay, so maybe this will form the basis of a credible answer to Ducati’s new Scrambler line. I only wish there was a way to retain air cooling, but if liquid cooling is what it takes to make a good, powerful engine and keep the eco-bureaucrats happy, so be it. The radiator’s not much more of a eye-sore than the current oil-cooler. Honestly, though, I don’t care if the bike has any more power. I have a Triumph Scrambler and I don’t enjoy it because it’s a powerful, fast bike. I enjoy it because of its simplicity. I also have a Sprint ST that I can ride if I need to zip down the freeway quickly. I usually take the Sprint to work and ride the Scrambler for fun.

    So, my question is will this, or a derivative, eventually replace the entire Bonneville line-up, or is something new and different altogether, to be sold along with the current Bonneville line?

    • Kevin Duke

      Developing a new engine is, by far, the most expensive aspect of building a new motorcycle, so this new motor will surely be used in upcoming versions of Triumph’s classic line. The current air/oil-cooled mill may continue on for a while, but I’d be surprised if it lasted more than a few more years.

    • Kenneth

      I’m even more impressed by Ducati, now, bucking the inescapable trend toward liquid cooling for the simplicity and aesthetics (at the expense of less hp) of air cooling for their new Scrambler. Yes, I’m an idealist.

  • Huddy

    A higher spec air cooled engine would have been a much better choice. Maybe this is just wearing Bonneville/Thruxton clothes but if they are going to change the Bonny line to liquid cooling, the classic charm will be lost. If this is an all-new cafe racer they are really going to have to make it look special to convince people that it’s worth the extra money.

    • Chris Cope

      They pretty much have to make these changes to be able to meet EU emissions standards that will be in place from 2016.

  • TalonMech

    Lovely bike. Bravo to Triumph. I hope they sell well for them.

    • Kenneth

      As a current Bonneville owner, I can’t see Norton worrying much about this coming model. Norton’s Commando is a high-end, limited-production classic (a much-truer classic than my Triumph), something my – or the upcoming – Bonnevilles will never be.

  • clasqm

    Spied? Pull the other one, as they say in Blighty. These are well-composed publicity pics, not grainy long-distance images of a dusty and camouflaged test mule. And the assurance with which you assert the model range lets me wonder who’s been having lunch with Triumph PR. :-)

    • Kevin Duke

      Dang, you mean we could’ve gotten these pics without paying a pro photographer for them…?

  • Bmwclay

    Damn……………….Just as I was gonna drop 24K on a new 80hp Norton 961 SE!

    • Reid

      lolol said nobody ever

  • Reid

    Now this could be suitably awesome.

  • Rokster

    My first thought was to agree with clasqm on the lunch with Triumph thing. But whatever, outstanding article nevertheless.

  • Matt Helps

    hopefully looking at some higher hp and torque numbers on the bonny in the future.

  • Andrew Capone

    After getting lost in the cruiser and paint- scheme special edition weeds for a few years, Triumph appears to be taking their core models seriously again. New Speed Triple is essential, and a litre bike would be nice. As would a mid- sized 800cc triple in retro guise (Trident?).

  • FauxScienceSlayer

    Interesting trivia on air cooled cylinders and liquid cooled heads. Preston Tucker produced a radical, post war auto using a rear engine, air cooled, opposed, six cylinder Franklin helicopter engine. Cooling problems forced him to add water cooled heads, decades before Porsche had rear engined six cylinder or air-cooled cylinders with liquid cooled heads. Monopolists closed his company, along with Studebaker, Packard, Kaiser, Rambler, Nash, Hudson, Willis and any other threat to monopolist hegemony. The movie “Tucker” with Jeff Bridges is an entertaining look at this great innovator. BMW R and Harley are late comers to the technology.

  • Dale B.

    Time to trade my Thruxton? I’ve been thinking about the new Norton as well – if there is a serious bump in horsepower with this new Triumph engine, will the Norton end up stillborn again?

    Also, am I dreaming, or is the tank a bit stretched? Maybe a bit of early 70’s “slab sides” styling?

  • Jobieb

    Ahhhhhh, I dug my way out from under my rock and found this!!! Time to go change the my fruit of the looms…. Good lord its a good time to be alive! Hurry up Triumph, my Daytona Super 3/ Speed triple hybred is getting long in the tooth (like me).

  • Gregory

    I don’t see any “water” cooling piping…nor a coolant recovery tank…nor a filler cap…in any of the pictures here and elsewhere. I do see a radiating device that looks twice the size of the current one, but not the size of a V-Rod…and useful air cooling fins. I also see an extensive belly pan which could contain a whole lot of oil. Also note the pipes look like they’ve been heated a lot. In Spain testing? Simulating Texas heat? This could be Triumph pushing the envelope on current air-oil methodologies/designs…which I applaud. Why add “water” to the design mix when keeping it simpler may actually be better? A few less maintenance issues than competitors would be a viable goal. The shots are suspicious in their composition and various angles…and like another post said…may be some kinda teaser to make people think twice before purchasing a competitor’s brand.

  • Dale A. Brown

    Nice to see Triumph responding to the new crop of bikes from Ducati and BMW in the retro scene with some new toys.

  • Mark Wagila

    The radiator might just be there to make people speculate on what could be.