Controversial engine break-in technique

Discussion in 'Motorized Bicycle General Discussion' started by nidyanazo, Jun 22, 2010.

  1. nidyanazo

    nidyanazo New Member

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  2. grinNbarritt

    grinNbarritt New Member

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    great link! now we need moto man to turn his way of thinkin toward 2 strokes...wonder what he'd come up with......
     
  3. adb140275

    adb140275 New Member

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    same exact thing.
     
  4. Venice Motor Bikes

    Venice Motor Bikes Custom Builder / Dealer/Los Angeles

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    I've read that quite a while ago & I agree!
    Many of the guys here (as well as I) say the best way to break in one of these engines is "just ride it normally"!! Don't be scared to run it at WOT after it's properly warmed up. ;)
     
  5. r00t4rd3d

    r00t4rd3d New Member

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    An old man ran a engine shop that bored out a ATC top end for me over 10 years ago. I asked him if I should take it easy on it for a while when I was picking it up. He told me "Break it in fast and it will be fast"

    Ive always remembered that.
     
  6. tire

    tire New Member

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    my chinese motor is shoddy and mostly crap, so i think that that argument doesn't hold true for my particular motor due to (i'm very confident of this) bad tolerances which would pay to slowly break it in.
     
  7. azbill

    azbill Active Member

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    the best, and longest running, 2smoke I had was run at WOT from the get-go
    I did take it easy on my 4stroke tho (couldn't afford to take chances)
     
  8. paul

    paul Active Member

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    my 2 stroke i knew to speeds. full speed and stop. something that i did notice with the 2 stroke was when the motor broke in. all of a sudden this rattling bucket of bolts smoothed out and took off. it wasn't some small change it was big time change. the 4 strokes i have not noticed any change to speak of once the were broken in. motorized bicycles are just great fun and great rides. a 2 stroke engine think of a week-eater or a lawn mower. both are always run at full throttle and no babying to break the motors in. only thing i do is use more oil during break in. this is all my thoughts on the matter and not sure if right or wrong but makes sense to me
     
  9. tire

    tire New Member

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    could we get more people to chime in? i'm afraid WOT initially (after warming up) could cause catastrophic failure of god knows how many parts, not the least of which are the rings and pistons, possibly a wear/stripping of the gears.
     
  10. NunyaBidness

    NunyaBidness Active Member

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    This subject has been discussed many times here. A lot of people, myself included, have run motors like you want it to run from the start. I believe, as was stated earlier, if you break it in fast it will be fast, and if you break it in slow, while it may not be slow, it will NOT be as fast as it could have been.
     
  11. Venice Motor Bikes

    Venice Motor Bikes Custom Builder / Dealer/Los Angeles

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    One thing to keep in mind is that a brand new HT engine run at WOT still won't reach it's full RPM's until it breaks in.
     
  12. Nougat

    Nougat New Member

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    Be nice while you're getting it warmed up (which can honestly take ten minutes), and then ride it like you mean it.
     
  13. Drewd

    Drewd New Member

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    Nothing controversial about the break in technique discussed in this thread. Its what I use for all of my vehicles and motored bikes.
     
  14. Mr.Gadget

    Mr.Gadget New Member

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    A little late here, Old thread, but very good reading.
    Warm it up,,,,,,Ride it like you mean it!!!
    I liked that one.
     
  15. Hammond Egger

    Hammond Egger New Member

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    I've spent the last two days researching how to break in a 2 stroke. It sounds like the most important thing is to warm it up, run it normally varying the speed for 15 minutes, let it cool down completely. Rinse and repeat three times.....then ride it like you mean it.
     
  16. Bike Monster

    Bike Monster New Member

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    I have a two stroke and i just cant resist opening it to full throttle... i have noticed after it has warmed up it will take off much better... though the other day i was hearing a clanking in the engine like a piece of metal was lose inside it also was vibrating alot more... so i had to cut my ride short... but ya this engine hasn't got it easy and it is doing good!!!.bf.
     
  17. Mr.Gadget

    Mr.Gadget New Member

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    Hammond Egger,

    When you say "Rinse" what does that mean? I have not heared that one yet.

    I have a new chrome kit that I have been breaking in slowly. But this one is cool, it has tons of low end torque, and I actually enjoy ridding it around at 20mph max. A low growl, and hill climbing torque. The MotorKike accelerates uphill with a 235 pound cargo/passenger (me)
    Our other bike is second hand and WEAK!!! I am looking into rebuilding the top end,,, and I think I will try to break it in for speed,,,, Just to see what happens.
     
  18. Hammond Egger

    Hammond Egger New Member

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    Just means start over and do it again. If you want to read some interesting break in material google break in rotax 2 stroke.
     
  19. WildAlaskan

    WildAlaskan New Member

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    this is how i see it when u first start that baby up take it easy for about 7 to ten minutes then ride it like you would normaly ride it for me if it was a single speed i would ride it 3/4 to full throttle but for someone like my dad who like to go easy just average riding speed break it in for where you like to normly ride it most people like it fast some like to take it easy

    as for a shift kit i would warm er up and run thru every gear working on the low to mid range more if i lived in hilly country or going for better acceleration but if i lived in flat land and wanted higher top speed i would break in each gear at mid to high rpms

    so to sum up warm it up taking it easy then ride it like you want normal, agressive, fast,

    i would think a person who breaks in a motor for slower speeds and actually rides like that would have a longer lasting motor

    as they say just my 2 cents
     
  20. bairdco

    bairdco a guy who makes cool bikes

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    the first motor i had, i broke it in more or less per factory instructions. it was the slowest motor i've had. took a month to break in using cheap oil, smoked, and got all oily.

    all the motors after that (6 bikes total) i run opti-2 at 100:1 and run full throttle the second they hit the street.

    i never let them warm up, i only vary the throttle if i'm in traffic, and i don't worry about them at all.

    all the bikes are still on the road, they all go fast, and the main bike i ride is still going strong after a year, and at least 5000 miles.

    my method is port match the intake, exhaust and transfer ports, make sure there's no extra metal chunks floating around, pour a capful of oil on top of the piston so it soaks in while you're building the bike, then fill it with Opti-2, pedal it long enough to know the chain's not gonna fall off, then kick it in the guts and hold on.

    i figure if it's gonna blow up, i might as well get it over with the first day.
     

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