Controversial engine break-in technique

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

  1. Mr.Gadget

    Mr.Gadget New Member

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    OK, Now I feel like our motor is already doomed!!!!!
    I found this site after I bought our kit and bike. First I read to run 16:1 and real slow for 500 miles. Then I read that 16:1 is too rich and should break it in at 24:1. After 2 gallons of gas I switched untill I get to 500 miles and drop to 32:1.
    Now I read this thread, and suddenly I am thinking that this bike will only be the cruiser that it is. That in its self is not all that bad though. Our Motor bike sound very low and gowly!!!!! And with my 235 weight it will climb all the hills around here and accelerate uphill without assistance. But only a top speed of 26 mph.

    Like I have read here, break it in the way you want to ride it. Cruising at 20 to 23 is not bad, especialy since the amount of low end torque it seems to have, and sounds way cool. I guess the only way I will ever see faster speeds, is to use the lowend torque to drive a smaller sprocket gear, like a 30 something.

    Still because it was for the kids and I, I do like the fact that is strong and slow instead of a speed deamon. Maby on my next build, I will try just going B***Ls to the wall and see what happens... Not to mention, I could just build up a spare motor and swap it out when I feel the need.
     
  2. Hammond Egger

    Hammond Egger New Member

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    I just ordered a jet66. I'm going to break it in using Bairdco's method but I'm going to use mineral based oil at a 32:1 ratio for the first gallon or 100 miles, whichever comes first.
     
  3. WildAlaskan

    WildAlaskan New Member

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  4. Mr.Gadget

    Mr.Gadget New Member

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    Thanks for the words of wisdom WildAlaskan. No sweat like you said, I am more greatfull for the low end torque anyways, and I have said in other posts that I actually enjoy cruising around at 20mph on a Sunday afternoon because ,,,,,,well, Just because. I am very surprised that a 66/80cc motor diplays this amount of torque, and I am not in a hurry to get anywhere anyways.
    But I do enjoy the speed once in awhile

    This will turn out to be a $100 question, If I broke it in different,,, would it really run different???? It's going to cost me $100 to find out. Not because everyone here tells me it will because they did it, or has the experiance to justify results. But so many factors influance the outcome, the only way to really know,, is to do it. That comes later. For now I will just enjoy the two bikes I have, and the time I am spending with my kids riding MotorBikes.
    Thanks Guys.

    Tons of Fun, Keep it safe.
     
  5. WildAlaskan

    WildAlaskan New Member

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    yeah heres the 100 dollarquestion conundrum these motors quality when built are so poor you could buy two motoras from the same vender and they could be completly different in power ranges or simple build quality so in reality it would be a 300 or 400 dollar question cause you would have to buy a good quality motor or maybe a 800n dollar question cause you would have to buy two motors and break em both in on a dyno or something to different standards but then again with a better built motor they would probly be built so nice there wasnt any real improvment in either one so it is indeed a conundrum

    i got lucky with my motor other than sripping a few bolts and changing the seal i havent had any major problems the majority of the problems i had where with the carb just yesterday j noticed the fuel input was loose for some reason it seems i take the thing apart once a month

    both kits i got from zoombicycles turned out pretty well im not to worried about engine life on my current motor cause i know i have done things to it and with it that i shouldnt have i can always borrow my dads bike one reason i keep that baby in top condition and never ride it so its there and ready when i need it

    if you guys are like me and so many others you wont stop at one or two or three motor bikes you will never really stop so these beginer motors are a learning experience for me the next one mb will always be built better and ran with more experience
     
    #25 WildAlaskan, Nov 24, 2010
    Last edited: Nov 24, 2010
  6. Saddletramp1200

    Saddletramp1200 Custom MB Buiilder

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    I ride 15 minutes, shut it down. Ride for 10, all @ 15 mph or less. Let it cool, then whatever it's geared to, for a short distance. for two tanks of fuel. (c)
     
  7. BarelyAWake

    BarelyAWake New Member

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    WildAlaskan has a point, there's enough variance between even the same model engines from the same factories that I suspect we'll never know lol

    To further confuse & befuddle, even the "experts" don't entirely agree on the "best" break in technique, though obv written for four strokes - I thought ya'll might find this interesting: New Engine Break-in Procedure
     
  8. Easy Rider

    Easy Rider Santa Cruz Scooter Works

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    Thanks for sharing this link. It's funny because back when I raced, the quickest way to break in your motor was to squirt WD-40 into your cylinder and Whala! Instant seated rings! LOL I have a spare Morini and after I'm done porting it, I'm going to try these break in technique.
     
  9. Mr.Gadget

    Mr.Gadget New Member

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    BarleyAwake,
    I had seen that link befor, but saw the length and felt too lazy to read it. So since you provided it again, I took the time to read it. Very informitive. More people should read it. After my nightly night ride, I am so happy with the performance of my motor, I am never going to jinx myself by hoping I can get top speed, when I have a motor that does a very good job, sound cool, and hauls my large behind around with a good amount of speed without any mods what so ever.

    Easy Rider
    Santa Cruz!!!! Although I am now in South Carolina, I was born and raised in San Luis Obispo. Remember the San Andreas frames (I saw two in Japan and it made me laugh!!) What I wouldn't give to ride the Cali trails again,,, and on one of your MotorBikes. I wonder If I could Ever talk you into building me a FS MB!!!! Or learn from a master.

    Take Care,,,, Happy Thanksgiving everyone.
     
  10. furament

    furament New Member

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    an if you get the oil wrong "sigh"
     
  11. Dogtown Burner

    Dogtown Burner New Member

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    I agree with Pat the motoman. always have "broken em in like you want em to ride", but there is one big caveat that no one has addressed, and I'd like to see what Pat thinks- he quotes, "The other factors that have changed are the vastly improved metal casting and machining
    technologies which are now used. This means that the "wearing in" of the new parts
    involves significantly less friction and actual wear than it did in the distant past."
    this does not really apply to a cheaply made chinese engine whose design is stolen from a russian WWII era scooter engine.

    just sayin...
     
  12. happycheapskate

    happycheapskate New Member

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    Moto man makes sense to me. I don't think you have to be excessive (don't over-rev or "redline" your engine unnecessarily, but after you warm it up get on it hard and do lots of accelerations. I think whatever is going to happen (success or failed engine) is going to happen regardless, so might as well ride it like you own it and get some thrill from it.

    Someone I used to work for told tales, with a big grin, about when he worked for an auto dealership. lol. Like the article mentions, those people test riding your bike or car probably joy-rode in it. He said he used to put the pickups in 4x4 to drive down from the auto hauler, then gas them and do burnouts and stunts.

     
    #32 happycheapskate, Nov 4, 2011
    Last edited: Nov 4, 2011
  13. bandito

    bandito New Member

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    Opinions on this subject are just as bad as the best oil threads. I believe in just not pushing any new vehicle to the limits 1st 1000 mi and i've always had good luck.
     
  14. Goat Herder

    Goat Herder Gutter Rider

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    The way I see it is and my voodoo logic..Wear a motor in with no load is bad on rings. Why because its critical at this point in juncture for the rings to establish a good even trained wear pattern. With no load on the piston rings they would be more pron to simply chatter as the piston travels up and down. So just idling the thing and revving it would be a bad idea under this logic.

    You got's to ride it.

    After a break in period this wear pattern is established better there for less erratic chatter per say as the wear pattern has train in and established it's course correctly or is what it is.

    I like to do my first good run on a sweet steady 4 mile long or even longer hill. Doesn't need to be vertical.laff Just a nice steady incline. ''A steady load'' Last I don't really pamper my motors ether. I ride it like I expect it to perform for the most part!!dnut
     
    #34 Goat Herder, Nov 4, 2011
    Last edited: Nov 4, 2011
  15. Mozenrath

    Mozenrath New Member

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    I only used 16:1 for the first gallon. After that I did another half-gallon of 24:1 and then 32:1. I'm now using 40:1 of Red Line Ester Synthetic, and it's still running great.

    I seem to remember some guy on this forum trying to "break in" his engine by starting it and then standing the bike next to a tree and letting it idle for a few hours. If memory serves me right, the bike ended up running like total crap.

    If I ever swap my engine or build a new MB, I'm probably going to just go with a 32:1 mix for break-in of the ester synthetic and switch to 40:1 after a tank or two. I've ridden it really hard since the beginning, and that doesn't seem to have effected anything.
     
  16. GearNut

    GearNut Active Member

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    I have been breaking in new and rebuilt engines the way the link suggests loooong before I ever knew about the link. I have never had a failure from it nor have I had a disappointed customer.
     
  17. happycheapskate

    happycheapskate New Member

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    Hehehehe. I guess if you don't have any hills, you can find a grassy spot no one cares about, dress the wheel in an old tire on the way out, and just stand there and do burnouts on the dirt till you thought it was done seating rings or what you needed to do.
     
  18. Goat Herder

    Goat Herder Gutter Rider

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    Ride it around on rickity bare bent wheels and drag some road kill behind you with it. laff
     
  19. happycheapskate

    happycheapskate New Member

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    then you might get on the news!

    http://motorbicycling.com/f28/mb-news-28113-10.html
    mb's in the news thread

    Alaska troopers need help picking up road-killed moose
    CHARITIES: It sometimes takes two dozen calls to get someone to butcher carcass.
    The Associated Press
    Published: January 10th, 2011 10:12 AM
    Last Modified: January 10th, 2011 10:13 AM
    FAIRBANKS -- Alaska Wildlife Troopers in Fairbanks are taking applications from people willing to collect moose killed on area roads.



    Read more: http://www.adn.com/2011/01/09/1640479/troopers-need-help-to-pick-up.html#ixzz1coKFtsvs
     

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