Busting The Engine Break In Myth | MC Garage

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  • Published on:  Monday, November 12, 2018
  • How to break-in a new engine is an extremely contentious topic. In this video from the MC Garage we bust the engine break-in myth by building up two engines, breaking them in using drastically different methods, and then tearing them down and comparing the components at the heart of the discussion.

    Engine Break-In Specs

    Engine 1, “By The Book Break-In”
    Installed at 1,828 miles, removed at 2,861 miles
    Break-In Notes: Ridden gently. Didn’t exceed 50% throttle or 5,000 rpm for the first 600 miles, and didn’t exceed 75% throttle or 7,000 rpm until 1,000 miles. Didn’t experience WOT until 1,000 miles was accumulated. Ridden with constantly varying engine speed and load, no easy task on a slow bike in a busy, urban environment! Oil and filter changed at 600 miles.
    Piston OD: 2.9910” at install, 2.9910” after 1,000 miles
    Cylinder ID: 2.9925” at install, 2.9930” after 1,000 miles
    Top Ring End Gap: 0.0130” at install, 0.0145” after 1,000 miles
    Compression: 235 psi hot after 1,000 miles
    Leak Down: 4% hot after 1,000 miles




    Engine 2, “Brutal Break-In”
    Installed at 2,861 miles, removed at 3,890 miles
    Break-In Notes: Went to WOT within moments of first starting up, and was ridden hard for 1,000 miles. Did everything we’re told not to—lots of throttle and high-speed droning at steady throttle. Oil and filter changed at 600 miles.
    Piston OD: 2.9910” at install, 2.9910” after 1,000 miles
    Cylinder ID: 2.9925” at install, 2.9930” after 1,000 miles
    Top Ring End Gap: 0.0130” at install, 0.0150” after 1,000 miles
    Compression: 235 psi hot after 1,000 miles
    Leak Down: 4% hot after 1,000 miles


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  • Source: https://youtu.be/xpoglovyy_8
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Comment

  • Besim GUNGOR

    Besim GUNGOR

     25 minutes ago

    Hi ijust saw your video, you need to protect your skin from the sun during 2 years by using maximum sun protection screen even when the weather is bad. Very important !

  • Hard Fiber

    Hard Fiber

     4 days ago

    There's no difference because it's a Honda.

    Try different engine you might find differences.

  • Joe_Anroy

    Joe_Anroy

     5 days ago

    u have no idea how much we, who don't have the time nor the tools to run these kind of tests, appreciate your vids. Sad this is your last time with MC Garage

  • dnalw0rld29 valencia

    dnalw0rld29 valencia

     7 days ago

    i want you to continue hosting this ...

  • danclapper626

    danclapper626

     14 days ago

    Ty

  • Sk8er Boi

    Sk8er Boi

     14 days ago

    My break in time is 500km

  • Rjr J

    Rjr J

     14 days ago

    How in the fuck do you get hit in the face with fireworks?!

  • Pranay Mohapatra

    Pranay Mohapatra

     14 days ago

    Most awesome motorcycle channel on YouTube

  • Noble Speed motoworks

    Noble Speed motoworks

     21 days ago

    Any oil analysis done with the 600mi oil ?

  • Ruger Shooter

    Ruger Shooter

     21 days ago

    By the book
    Break-in same as you drive
    Or the new one break-in at full throttle

    I just got 2 new bikes, I'm doing it by the book.......since it doesn't matter then it won't hurt anything
    I'd need a bunch of straight line to do full throttle.....thats not why I ride
    I can cruise at 60 in 3rd(and its got plenty to go)......warm it up then cruise in 5th(thumpin) for awhile to cool it down

    And thats pretty much the way I drive anyway......yes acceleration is slower

  • comcastjohn

    comcastjohn

     21 days ago

    Hate to see you guys go. Congratulations on the new gig good luck! 👍😎

  • Seattle Man

    Seattle Man

     28 days ago

    After changing the oil, did you cut away the filter and examine it?!

  • TheCodexNecro

    TheCodexNecro

     a months ago

    Used a Honda engine. Of course there won't be any wear.

  • broderp

    broderp

     a months ago

    The bottom like should be to follow the manufactures specifications. You blow that new engine up or if it just failed while riding near red line then you may have just bought an engine. Warranty can be denied for not following the manufactures direction. Think they won't know? Think again. There is a science behind wear, friction and many new bikes have black boxes that record data- engine data.

  • Erik Bakstad

    Erik Bakstad

     a months ago

    Hahaha...

  • Kirk Kramer

    Kirk Kramer

     a months ago

    Won't be the same without you😞

  • mad ass

    mad ass

     a months ago

    Bet there's a difference in surface of gears under a microscope.

  • live and let live

    live and let live

     a months ago

    Dyno wouldn't show much bikes make more hp as the7 break in

  • Nandu Sunil

    Nandu Sunil

     a months ago

    Superb content......🥰

  • Geoff Gyro

    Geoff Gyro

     a months ago

    Run the bike at low RPM for a day and the engine will have a million strokes. Plenty of break-in.