First Start

Discussion in '2-Stroke Engines' started by billpb1222, Oct 29, 2009.

  1. billpb1222

    billpb1222 New Member

    hi,
    can someone give me step by step instructions to start a chinese 80cc engine mounted on a schwinn occ?

    thanks,

    bill:cool2:
     

  2. bluegoatwoods

    bluegoatwoods Well-Known Member

    Do you need the basics?

    Just pull in the clutch handle, pedal up to 4 or 5 mph and pop the clutch. You might or might not need a bit of choke.

    If you need something more specific, I'm sure we can help.

    Are you having trouble starting it up?
     
  3. billpb1222

    billpb1222 New Member

    bgw,

    thanks. i'll try it. no need to prime or choke? how long would you let idle before riding?

    break in is suppose to run under 30 min. and not over 20mph? does that make sense to you?

    thanks again,

    bill
     
  4. Al.Fisherman

    Al.Fisherman Active Member

    Up untill this month from day one, I've never used any choke at all. Although if the bike sits overnight or longer I do prime...about 3 pumps. As far as break in time and speed, it can't hurt. That is how I did mine...zero problems and 290 miles.
     
  5. Mountainman

    Mountainman Active Member

    be a little easy on that MB thing for the first 50 to 100 miles
    keeping the gas mix nice and rich
    check those head studs for proper torque

    ride that thing
     
  6. billpb1222

    billpb1222 New Member

    hi,
    i tried to start twice. chain snapped twice where i spliced a chain extension. any ideas? i'll keep trying to modify.

    thanks,
    bill
     
  7. Mountainman

    Mountainman Active Member

    are you using a chain tool to put that THING together

    bill
    are you using a chain tool to put that THING together
    when done right
    that chain should not break there
    cheap chain tools available at wal-mart ------- under 10 bucks

    get it fixed and ride that MB thing
     
  8. bluegoatwoods

    bluegoatwoods Well-Known Member

    though if we're talking about the engine drive chain, then a wal-mart chain tool is not going to do the trick.

    But if you're snapping chains on start-up, then I'm thinking that you don't have the tensioner set right. It's probably acting like a bottleneck in the "flow" of the chain. Try moving the tensioner as far forward as possible. Or you can get the tensioner off of that chain altogether. Here's how I did it:

    http://www.motoredbikes.com/showthread.php?t=9809&highlight=tensioner

    As far as choke goes, I don't hardly choke at all above about 50 deg F. From 40 to 50 needs a bit of choke. Below 40 needs quite a bit. Though individual engines are sure to vary, you don't usually need a lot.

    My warmup is minimal. I figure that all I really want is to avoid putting a load on an ice cold engine. I'll bet they get to a reasonable temperature very quickly. Above about 60 deg F, I'll just pedal along at very little throttle for a minute or so letting my legs carry a good part of the load. From 40 to 60 or so I'll start it up then pull over to the side, goose the throttle just a bit for maybe half a minute the go. From the low 30s down I'll warm it up for about as long as it takes to smoke a cigarette.
     
  9. bluegoatwoods

    bluegoatwoods Well-Known Member

  10. billpb1222

    billpb1222 New Member

    thanks guys,
    i think i fixed the chain but i will get a chain today. now the chain is jammed in the engine. it does not look like it is jammed on the engine sprocket. could it be something internally? i am thinking the worst like engine seizure before first start. please tell me it is not that.

    bill
     
  11. Al.Fisherman

    Al.Fisherman Active Member

    First of all what mods have you done to begin with if any. I did a head gasket mod and the piston when approaching TDC hit the gasket. Remove the chain from the engine. Remove the spark plug. Remove the clutch cover. Disengage the clutch and use a good size screwdriver and rotate the small gear that drives the clutch. Should rotate the crankshaft smoothly. If not next step remove coil cover and try if same remove the head and try again. MAKE SURE the clutch is disengaging doing this test. If problem still exsists remove the clutch itself and try again...still have the problem I hate to say...tear down.
    http://motoredbikes.com/member.php?u=8886

    http://motoredbikes.com/album.php?albumid=808
     

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    Last edited: Oct 31, 2009
  12. billpb1222

    billpb1222 New Member

    i still can't get engine to turn over. i don't hear any firing. could it be the white wire from engine to installed headlight. i doubt the headlight could be more than 6 volts. i connected single black wire from headlight to white wire from engine. getting frustrated.

    bill
     
  13. AussieSteve

    AussieSteve Active Member

    Hello Bill(pb1222), a couple of points that might help out:-

    1. The white wire is not intended as a lighting supply. It is best used only for the kill switch.

    2.
     
  14. billpb1222

    billpb1222 New Member

    thanks steve.

    bill
     
  15. billpb1222

    billpb1222 New Member

    still can't get this thing to start. disconnected white wire and taped it off. pedaled fast, popped clutch. no spark and wiped out. almost killed myself. i'm 50 yrs old and disabled. am i crazy too? i'm determined to get this thing started. please help!!!!!!

    bill
     
  16. AussieSteve

    AussieSteve Active Member

    Hi Bill. I'm 51 and disabled, (emphysema), so I know where you're coming from.
    First, you need to check that you're getting spark at the spark plug. Remove the plug, then push it back into it's cap and lay it on the head so that the spark plug body contacts the fins. Then, with the clutch released, spin the rear wheel forwards as fast as you can while watching the plug and see if there's a good spark, or any at all. You might need to get someone to help you do this. Let us know the result.
    ... Steve
     
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