Oil issue running 212cc predator almost vertically

Discussion in 'Motorized Bicycle General Discussion' started by Boscosz28, Mar 6, 2017.

  1. Boscosz28

    Boscosz28 New Member

    Joined:
    Mar 6, 2017
    Messages:
    6
    Likes Received:
    0
    Ok. Recently completed my first motorized bike build. Pat at Busted Knuckle Bikes did a fantastic job!! But I have a question about oiling and a possible issue. The engine is brand new.. I have run it for 30-45 minutes this weekend, and it runs great. It is a 212cc predator engine. I am having some oil, which appears to be coming from around the valve cover..dripping down the front of the engine. I know these engines are designed to sit at a 40-45 degree angle. Mine is sitting basically vertical. Trying to find out if this will cause any long term issues, or if my possible oil residue is simply because the engine was not designed to run at this angle. Picture gives a little more information..

    Thanks!!

    [​IMG]

    [​IMG]

    [​IMG]
    [​IMG]
    [​IMG]
     
    #1 Boscosz28, Mar 6, 2017
    Last edited: Mar 6, 2017
  2. Tony01

    Tony01 Well-Known Member

    Joined:
    Nov 28, 2012
    Messages:
    1,068
    Likes Received:
    110
    Put about 20oz and when it stops dripping measure what's in there and that's the right amount. For me it's 19oz.

    Really nice looking bike. But swap that POS fork out for anything else even a rigid for now till you get a real dual crown dh or springer fork.
     
  3. Boscosz28

    Boscosz28 New Member

    Joined:
    Mar 6, 2017
    Messages:
    6
    Likes Received:
    0
    Great! Assuming you have the same engine in the same orientation?

    And that was the only dated Fork he had available at the time.
     
  4. ZipTie

    ZipTie Active Member

    Joined:
    Jan 8, 2016
    Messages:
    750
    Likes Received:
    47
    That is one hot looking Ride. As tony01 says that fork can instantly fail without warning, even with a lightweight 2 stroke let alone a heavy 212cc 4stroke. The fork looks awesome on the bike but.... Id keep real slow and cool with the present set up. Tell us more about the build with some more picts if you find time. Again beautiful bike.
    zip
     
  5. Tony01

    Tony01 Well-Known Member

    Joined:
    Nov 28, 2012
    Messages:
    1,068
    Likes Received:
    110
    See my sig 212 2spd. On a build $hit will fall apart randomly so better make sure it's not your fork. That one WILL fall apart within 100mi probably a lot less. I still run the dual crown rigid cause I haven't yet found a susp fork I can trust.
     
    #5 Tony01, Mar 6, 2017
    Last edited: Mar 9, 2017
  6. Boscosz28

    Boscosz28 New Member

    Joined:
    Mar 6, 2017
    Messages:
    6
    Likes Received:
    0
    I looked over the design, and yes.. it looks like its quite frail. I will certainly take your advise.. Finding something that looks like it will fit the build of the bike (style wise) will be my issue I suppose. Any recommendations?

    Little details of the bike..
    My criteria were pretty simple for this one... I wanted to be able to start the bike without a cord, and wanted it to remain as rusty looking as possible. He did a good job on both! I dont have very many more pictures during the build, but will see what I can find.. Will have some good "finished" pictures coming soon. Have just a few little quirks to work out.

    EDIT: I embeded a few more pictures in the OP, including one of how I found the bike.
    Cheers!
     
    #6 Boscosz28, Mar 6, 2017
    Last edited: Mar 6, 2017
  7. Boscosz28

    Boscosz28 New Member

    Joined:
    Mar 6, 2017
    Messages:
    6
    Likes Received:
    0
    Perfect! Ill go home and drain, refill and see what I come up with. My guess is there is probably just too much in the crankcase. And yes... Thats one part I dont want to fail. Like posted above, I want to keep the character of the bike intact. Any suggestions for something I could replace it with, and still leave it looking 'period correct'.. or close to it. :)
     
  8. ZipTie

    ZipTie Active Member

    Joined:
    Jan 8, 2016
    Messages:
    750
    Likes Received:
    47
  9. curtisfox

    curtisfox Well-Known Member

    Joined:
    Dec 29, 2008
    Messages:
    4,565
    Likes Received:
    541
    AWESOME! Bike, like the tank and all............Curt
     
  10. TheNecromancer13

    Joined:
    Jan 21, 2015
    Messages:
    610
    Likes Received:
    19
    I used one similar to the one in the second link for my lifan build. It's a good, sturdy fork, and the one I got had disc brake mounting tabs.
     
  11. gsmith003

    gsmith003 New Member

    Joined:
    Mar 25, 2017
    Messages:
    9
    Likes Received:
    0
    Another fork possibility -
    https://monarkforks.com

    Engineered for powered bikes. I'm going to try this on my build project, also a 212. Should end up with a good retro style end product using a sixthreezero in the barrel frame. That is IF I can manage to make that 212 look like something other than a lawnmower engine.
     
  12. Potato_In_Exhaust

    Joined:
    Feb 2, 2017
    Messages:
    155
    Likes Received:
    3
    Damn, SON!! That's a sweet ride, tastefully done...... none of that bling bling chrome and neon light stuff.
     
  13. MEASURE TWICE

    MEASURE TWICE Well-Known Member

    Joined:
    Jul 13, 2010
    Messages:
    2,227
    Likes Received:
    110
    My Briggs engine tilted forward about 15 degrees does not leak the from the breather hose back to the airfilter now that I RTV gooped the swivel at the breather and other connections. There is an odor after running a while that smells like oil. The exhaust does not look blue or smokey. I still think it probably is the oil fumes going back to the carb and the top of cylinder to be burned with fuel charge.

    I used the fill level where it says full when engine is upright. I'll check the level at some point by removing the engine and putting it level to see where it is. Also and even better is to see the difference between how much oil is left in side the engine if at some point the smell goes away. That is fill it to full level and measure how much it takes. And how much is left when it stop smelling like burning oil. The difference is how much less is really needed, as long as it does not seem like a large percentage. So far no performance or starting issue at all with the engine even with this oil smell. Also no oil spray getting from breather connection onto my pulley and belt making it slip.
     
  14. EZL

    EZL Member

    Joined:
    May 13, 2016
    Messages:
    32
    Likes Received:
    29
     
  15. EZL

    EZL Member

    Joined:
    May 13, 2016
    Messages:
    32
    Likes Received:
    29
    The crankcase needs to be vented which is what is being done with the stock carb and filter which recycles the oil vapor
    from the engine. The stock setup is not good and the way to do it right is to get the valve cover with the brass fitting
    on it which a hose can be attached to. The hose is usually a 5/16" fuel line hose which connects to the barbed brass
    fitting and the other end could go to a oil catch tank. https://www.gopowersports.com/aluminum-catch-tank
    Without venting the engine it's possible to blow seals out of it since there is pressure built up in the crankcase.
    I purchased the CNC valve cover from GasBike and drilled/tapped the valve cover for the brass barb fitting.
    If you do that be sure to get a tapered tap that is for brass fittings with fine threads. I haven't ordered the tank yet
    and have a hose that attached to a small filter that lets the oil vent to the ground. A small vent filter helps to keep
    dirt and debris out of the hose. The downside of using the vent hose venting to the outside is, you will have a
    oil drip in the shop floor when the engine is shutdown. The catch tank is the way to go. RebBeard's Garage on
    YouTube shows instructions on mounting the tank.
     
  16. Tony01

    Tony01 Well-Known Member

    Joined:
    Nov 28, 2012
    Messages:
    1,068
    Likes Received:
    110
    Sorry, everything in your post is wrong. The stock breather system works great. No catch can needed. And please stop bringing up/quoting posts from 2017.
     
  17. EZL

    EZL Member

    Joined:
    May 13, 2016
    Messages:
    32
    Likes Received:
    29
    The stock oil crankcase ventilation system recycles the oil through the breather much like the 49cc engines.
    Check out RBG: https://www.youtube.com/watch?v=RTHDeAMrjO4
    The old V8s and 6 car engine ventilated to the outside with a pipe behind the engines and always dripped
    oil on the floor. Then in the 60s they recycled through a backfire valve (PCV) to the carburetor or intake.
    Just saying, I'd just as soon keep it out of the combustion chamber since it gets a little enough that passes
    around the rings.
     
  18. Tom from Rubicon

    Tom from Rubicon Well-Known Member

    Joined:
    Apr 4, 2016
    Messages:
    441
    Likes Received:
    444
  19. EZL

    EZL Member

    Joined:
    May 13, 2016
    Messages:
    32
    Likes Received:
    29
    Tom from Rubicon likes this.
  20. Tony01

    Tony01 Well-Known Member

    Joined:
    Nov 28, 2012
    Messages:
    1,068
    Likes Received:
    110
    Have either of you guys even put a hundred miles on your 212 builds? Put the miles in then come and give advice. Or else you are just perpetuating the garbage that is the internet.

    Here’s actual real info from a person that put the miles in:
    I put 15000 miles on my first 212 before the case cracked due to vibration. I ran the stock valve cover and never had issues with oiling. They come with a breather in the valve cover for a reason.

    Don’t give advice you haven’t tested yourself. Just because people use catch cans doesn’t mean they also put the miles in.
     

Share This Page