Bringing you the world's best cafe racers, trackers, scramblers, bobbers & custom motorcycles.

Yamaha SR400 – ‘Clock Work’ by Moto Rock

Posted on June 29, 2012 by Andrew in Bobber. 49 comments

The Yamaha SR400 is still one of the most common bikes on the streets of Japan. It’s as Japanese as Sushi, Karaoke and Girl Pantie Vending Machines. Yamaha has been building these indestructable little thumpers for mucho decades, hardly changing a thing – until recently when they introduced the fuel injected models. I have a huge soft spot for these single cylinder SR’s, not just because I own one but because they can be easliy transformed into pretty much anything. We’ve seen most incarnations here at Pipeburn, mostly they’re turned into cafe racers, trackers or less commonly even bobbers. But we don’t usually see anything like this chrome creation built by Motor Rock. The guys from Nagoya have really taken this SR to the next level, building something truly unique. Sure, it has influences from Shinya, Zero and the samurai chopper, but Moto Rock have still managed to make it uniquely theirs. And we really love that.

This SR400 has been named ‘Clock Work’ – which is so appropriate for this Japanese bike that runs just like clockwork. The engine features 89mm Piston/92mm stroke crankshaft fitted high performance Keihin CR Carburetor and classic K&N air filter. The front has a 74 Springer/Processing front fork fitted with one-off handlebars and Dakota digital meter. The rear features an EASYRIDERS billet suspension with one off tail light and licence plate holder. Unlike some, the guys at Moto Rock are big fans of vintage coker Firestone tires, and ‘Clock Work’ rolls on 16-inch front wheels and XS650 rear wheel. We love the stunning polished metal and chrome finish on the bike, although not sure about the touches of Japanese opal bling.

The fabrication work is sensational. Most of the parts for this project were hand made by Motor Rock in their workshop, including the front and rear fender, battery case, exhaust, kick pedal, footpegs, sprocket cover and of course, the standout feature, the all in one custom seat and fuel tank. These original and creative touches are what set the men from the boys. Which is probably why ‘Clock Work’ garnered so much attention at the 20th Annual Yokohama Hot Rod Custom Show. Deserved don’t you think?

[Spotted on Motorivista]

  • davmo

    Stunningly funky and cool. Not something i would take to the local bar, but… Incredible workmanship. The only puzzling feature is the pillion pegs? I guess they could be used as rearsets. The article also mentions a front fender.

    • Yeah, I also see the rear pegs as puzzling. One obviously isn’t going to have a passenger (at least not a sober one), so the pegs may be for laying out on the open road.

  • heckwellenbrettreiter

    Every once in a while, something very special comes along… I like.

  • PariDas

    Personally, I love the one-piece fender/seat/tank but the lines of the tank ruin it for me, especially in profile. A beefier, more rounded tank would balance out the high (but very short) rounded fender and back end in general. Other than the tank, I love this machine.

    • revdub

      I completely agree. A rounded tank would have made this. The tank and seat do not match at all, in my opinion. But, the fab work is off the charts awesome. I’ve said it a thousand times, I will own an SR one day.

  • $3618564


    • davidabl2

      No brass, can’t be steampunk 😉

  • Would love to know how many hours went into this. Fantastic.

  • arnold

    Sitting on the fuel tank is always an interesting concept. Never the less I am amazed with this build.

    • Oldroadie

      Is it really that much different than laying on it cafe style?

      • arnold

        You know, I don’t know. The old fords had it between the firewall and passenger compartment, other makes had just behind the seat. Plenty of people survived those years, but they do not seem to design vehicles that way any more.

        • Oldroadie

          I wouldn’t be so keen to be inside a closed cab with the task, even though that is exactly how my old 60s C-10 was built. Also the reason I sold it. If that seat tank was fiberglass it might make me nervous but the steel can somehow reassures me.

  • sbaugz

    very cool. love the unique form of the seat and I have to disagree with comments above- I really like the tank and seat together. very different than the norm.

  • menormeh

    They did such a great job of fabricating the front fender that I can’t even see it……..This entire build is essentially redefining butt ugly.

  • PGearbox

    Warn me next time so I can put my sunnies on 😉 very cool. Also why are the comments all out of order? Hard to follow the train of the blog especially when a big Guiterslinger vs everyone else breaks out.

    • PG – it’s the new version of DISQUS. To re-order as previously, just go to the “DISCUSSION” menu above and choose “oldest” from the drop down.

      Unlike the previous version of Disqus, I can’t see how to set this as the default option – an email to support might be in order…

      • PGearbox

        Thanks Andrew:)
        Sent via BlackBerry® from Telstra

  • BigPeeWee

    No flow. no design. looks like 200 parts thrown at a magnetic frame with junk stuck everywhere. The bar keeps getting lowered for what iz cool. It’s real shiny though. It needs an iron cross sissy bar and a empty milkcrate on the back fastened with fence wire. Next.

    Can I have the carb? This bike sure doesn’t need it.

    • davmo

      Hey, don’t hold back, tell us how you really feel. The magnetic frame comment is pretty funny. LOL.

    • So you only build a bike to be cool?

      • BigPeeWee

        You sayin’ this bike is functional then in a contorted riding position sort a way?
        I said cool because of all the praise. It must be right?

    • bigmattie

      And I’ll have the braced swing arm, with a decent set of shocks/front end to make use of it…

  • Drunkandgreasy

    Lots of skill, but a good example of just because you can, doesn’t mean you should. At least to me.

  • Robbie

    Nice and different compared to most sr’s. Not something I would build but can appreciate the workmanship and creativity. Well done

  • amazing bike, thanks for sharing 🙂

  • MIcah

    turd. a shiny turd.

    • WillyPs

      You are being very kind.

  • schumtz hater

    junk bike

  • That’s really cool. I’d lose the opal bling. I also agree with some that the curvilinear lines of the seat don’t really jive with the rectilinear lines of the tank.

    I looked again, so this is an edit. There are a bunch of springy/ringy design elements to the front, but the back end has a very subdued suspension. That breaks the flow and ruins the consistency of design. One would expect SOME kind of springiness to the rear suspension.

    Also, in the 5th pic down, there is some kind of big, shiny belt guard (?) or something sticking out that isn’t in the other pics. What is it and where did it go?

    • Is that a license plate holder on the left side above the rear axle?

    • davmo

      Was puzzled by the same thing. At first It appeared to be an absurdly oversized brake vent scoop (plausible given the way-out nature of this build,) but after checking the Motorivista picture, it looks to be more of a martini shaker than anything else. The license plate obscures the view from behind.

    • Looking again, it does appear to be the plate holder. Kinda funky and overdone, but I guess it holds the plate. Looks like the top half is “washed out” in the photo, but I notice the 2 little holes to the right of it matchup with the plate holder in the pic above. Mystery solved.

  • GuitarSlinger

    Well I’d call this bike a well executed ‘ pastiche ‘ made of 2/3 Shinya Kimura ( pre Chabott ) and 1/3 Ron Finch . Which is to say with the RF influence its verging on being excessive . I’d also say it neither has the flow or continuity of Shinya Kimura nor the Absurdity of Ron Finch , making the design look confused at best
    On a scale of 1-10 , due to the complex issues with this bike I’d say // Craftsmanship …. 10 // Overall Execution …..6 // Design ……. 2

    Whinge on gentlemen as I’m sure will be some of you’s want 😉

  • Mgmue mgmu

    Not a fan of this bike. It’s just a confused mess. An intricate bike to be sure, with much more craftsmanship that I’ll ever have, but not my cuppa tea.

  • Greg

    There is a lot going on in this one. Not sure I like it but I can see where it could have went

  • $20707106

    I respect the fabrication skills, but the “design” looks like Arlen Ness with a 5th degree in martial Wabi-sabi.
    My eyes find no comfortable place to land.
    So many contradictions.
    If that is the intent, congratulations, but the overall effect is I just want to look away.

    • BigPeeWee

      “No comfortable place to land.” Makes my eyes hurt. Wonder if the builder drew a picture first and then said “Ahah! That’s it!” or if it just ended up looking like it just ended up this way.

  • Jed

    Super cool. Love Japanese irreverence and creativity.
    Clutch/gear change is especially schweet.

  • lu Sca

    really really really coooooool!!!

  • easyrider

    I like it good to be diffrent

  • Where does the gas go?

    • The seat pan and tank are one piece, so you fill up behind the seat. Nifty, huh?

  • nobby

    I really love gooseneck frames and raked early springers, the best one I’ve ever seen is the Garage Company built, “Johnies 103 Pan”, (pic on their website), …much nicer than the Zeros and I love the Samurai Zeros.
    The bike above isn’t to everyone’s taste, I don’t like billet bling myself. But it’s still a looker.

  • nobby
  • wow… that is what we called a NICE BIKE!

  • Brock Wilborn

    Anyone know where I could get an upswept pipe and muffler for a 2014 SR 400?