2011 Husqvarna SMR449/511: a BMW G450X supermoto

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Equipped with the same Kymco-made single-cyinder and concentric gearbox output shaft/swingarm pivot as the BMW G450X, these new Husqvarnas are sort of an Italian supermoto based on a German dirt bike. The SMR449 and 511 are more than just slick tires and 17-inch wheels though, Husqvarna claims advantages like improved ground clearance, an improved ability to stick big jumps and better all-round traction.

The 2011 Husqvarna SMR449 is equipped with the same 449.5cc, 40bhp, 32lb/ft engine as the G450X — signified by the rakish cylinder head — while the 2011 Husqvarna SMR511 increases the bore from 98 to 101mm, the stroke remains 59.6mm on both. Engine performance for the larger version is not quoted. Those engines are also fuel-injected, equipped with electric start and hydraulic clutches. Both bikes weigh 118kg/260lbs (dry).

The idea with the concentric sprocket/swingarm pivot is to eliminate chain growth as the swingarm moves up and down. Husqvarna has dubbed this the “Coaxial Traction System,” claiming such advantages as reduced sprocket and chain wear and less frequent variation of the load on the transmission. That latter benefit is said to improve rear wheel traction while accelerating and over rough terrain, all while making gear shifts more positive. The end result, Husqvarna claims, is that the bike behaves in a more uniform, predictable manner through a wider variety of conditions, improving rideability and stability.

Another novel technical solution is the rear shock linkage mounted above the swingarm. This is claimed to improve ground clearance, make replacing the shock or linkage easier and provide more gradual absorption of large bumps. The latter is again said to improve rideability, while it should also reduce the recoil of the rear wheel when landing jumps, meaning the bike will be less likely to bounce the rider off.

It’s also worth noting the extra-long seat, which runs uninterrupted all the way from the steering stem to the rear fender, and the one-piece bodywork underneath it that’s completely free of seems, gaps or ridges that could trap clothing or otherwise hinder movement around the bike.

Husqvarna via Supermoto-Central

  • Tim

    I want it!

  • gregorbean

    Me too. That thing looks super fun.

  • noone1569

    Light weight but still as powerful as a sportster . . hmm

  • seanslides

    40 HP? I am a disappoint.

    • http://hellforleathermagazine.com Wes Siler

      That’s the number for the G450X with the stock exhaust, it does quite a bit better with a non-approved can.

  • nymoto

    Hey Wes or Grant,
    question that has nothing to do with this bike (i want one, I love supermoto’s),
    in the Galleries section is there any way you can put all the photo’s for one subject in the format you do the “features” in ?? instead of the pop up frame that you have to then press the arrow for the next pic?
    I dont know how hard this would be, just on any mobile device (and computers) the galleries is SLOW and sometimes freezes up, and the “features” format kicks ass…

    • http://hellforleathermagazine.com Wes Siler

      There’s a couple of functional things we require from our gallery system:the ability for you to download large versions of the images and the ability for you to view the images in the gallery full screen on whatever size screen you have. And yeah, it’d be a royal pain in the ass to lay out a photo feature for every gallery.

      What browser/OS are you on? The galleries should load MUCH faster than one of our photo features.

    • http://hellforleathermagazine.com Grant Ray

      Those bespoke, long format features are a labor of love. Doing that for every gallery would be a nightmare and just take waayyyy too long. Sorry.

  • http://www.tripleclamp.net Sasha Pave

    I worry about Husky now that it’s going with Kymco engines. Where does that leave Husqvarna?

    They have considerable talent making engines, their latest 250 FI engine is phenomenal.

    The concentric sprocket/pivot is nice, but it’s not enough to hang your hat on. Husky needs to offer more than a chassis to make it. I’d hate to see the brand wither into a niche specialty here in the states, like Beta or Gas Gas.

  • nymoto

    Ok,No worries. yeah I figured it would be more work, but did not know what it entailed.
    I just like that format.
    I am on firefox/Mac OSX, I guess i am just impatient for awesomeness. haha.
    Anyways Thanks for the reply, keep on truckin.

    • http://hellforleathermagazine.com Wes Siler

      Weird, it should definitely load faster then. Trying clearing your cache and checking your connection speed. I’m on a shitty Time Warner cable connection running FF/OSX and it’s super fast.

      • andy727

        I have a similar prob on my iPad. Galleries are awful slow, but the photo features rock on here. This applies on both 3G and my home AT&T DSL connection. My home windows computer loads everything fast.

  • NickK

    Sounds awesome. I’m really becoming more intrigued by these, though I’ve never ridden one.

  • Cajun58

    Hotted up 450 SM and MX bikes make upwards of 60hp and this engine is no doubt capable of that with a little tinkering. I’m not liking the BMW influence on the styling or bring the gimmicy items like the sproket location.