Is this the engine I need?

Discussion in '2-Stroke Engines' started by SeanPatrick, Jul 21, 2015.

  1. SeanPatrick

    SeanPatrick Member


  2. crassius

    crassius Well-Known Member

    I'd recommend buying a motor that has the cylinder you need already on it - there may be other mix/match problems if bought separately.
     
  3. SeanPatrick

    SeanPatrick Member

    I cannot find an engnie with the jug I need. I have searched here, the facebook groups, ebay. Nothing. Best I can do is get a full kit for $200
     
  4. crassius

    crassius Well-Known Member

    try google '80cc motor +40mm intake'
     
  5. KCvale

    KCvale Motorized Bicycle Vendor

    Just a tip.

    A $100 e-bay painted engine is like a $100 Wally World bike.
    Garbage with all the flaws covered with paint.

    Paint don't fix anything other than making your wallet lighter.

    I suspect these are garbage engines rejected from a no name factory and painted to cover the case/bearing/who knows what obvious problems.

    I mean come on...
    Do you REALLY think you are going to get anything good for $100?

    Ya, sure just dandy until the paint gives and you have crankcase leaks and the list goes on.
    Good aint' cheap, period.

    If cheap works for you and you don't have to depend on the thing and like to tinker great!
    If not, well, there ya have it.
     
  6. crassius

    crassius Well-Known Member

    I sell great, new, motors for $100 exchange or $120 without exchange all the time - as a repair shop, I probably sell more motors than kits. I've been thinking I maybe ought to lower that price, as kit prices have fallen this year.
     
  7. SeanPatrick

    SeanPatrick Member

    KCvale, What does it matter when I'm ripping it all apart and replacing every bearing nut bolt gasket and seal?
     
  8. SeanPatrick

    SeanPatrick Member

    Reason I'm buying a motor at all is because it was cheaper than fixing the rear motor mounts on my current motor. They sheared off flush, and after going to a machinist and a muffler shop I decided it was much cheaper to buy an entire motor.
     
  9. crassius

    crassius Well-Known Member

    yep, that's why I sell motors - if the customer can't fix it himself, my labor charge even at just $20/hour makes a whole new motor cheaper than repairs plus parts many times
     
  10. KCvale

    KCvale Motorized Bicycle Vendor

    Nothing wrong provided the case, cylinder, head, crank and piston are quality I suppose.

    I just can't see paying $100 for just an engine you feel you have to break open, take apart, buy and install new 'quality' parts, and reassemble hoping it don't leak when you can just buy one for like $120 you don't have to dink with at all.

    I was talking about entire kits for $100, something if not most everything has to be 'short cut' parts.
    Fine for the hobbyist with just one or 2 builds and time.

    A total profit killer if you fix them for free and don't care for repeat business or referrals.

    When it really matters, the better parts are worth the extra money, but like Harbor Freight tools, sometimes you can score a bargain if you get the use you need out of it before it fails is my opinion.
     
  11. SeanPatrick

    SeanPatrick Member

    Last time I tried to extract a bolt I broke off my extractor. I don't have a good drill and my dremel died a couple weeks back, so I'm a little limited in what I can do on the balcony of my apartment.

    Fortunately This is my only build and I won't be trying to turn a profit at all. And I would be tearing down any motor I bought. I used to work on and ride snowmobiles before I moved to California. Problem was, I rode vintage sleds. Stuff you can't just buy a new jug or motor for. So I never attempted any mods at home, at least nothing like porting or designing/building a tuned pipe or going from piston port to reeds. With as cheap as the parts are for these, to me, it's pretty disposable stuff and I want to experiment. I'm also about two weeks from starting school again for Auto CAD/machine tool tech, so hopefully I'll have more resources.

    I did end up ordering that motor and jug I linked. I'll let you guys know how it all goes.


    p.s. I'm on my way to harbor freight to get some hand files right now.:whistling:
     
  12. jeffuehrer

    jeffuehrer Member

    The engine I bought for under $100 on eBay has over 3,000 miles on it and I've only had to replace the wrist pin & bearing, jug, piston & rings and CDI (from another engine) also upgraded the spark plug and wire. Also the rear mounting bolts. I usually mount as is and if something goes I replace it which is usually bolts (cheap arse 4.4 grade).
     
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