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New Member G'day - and HELP!

Discussion in 'New Members Say Gday' started by Daniel Schmidt, Oct 12, 2018.

  1. Daniel Schmidt

    Daniel Schmidt Member

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    Hi motorcycle lovers! After being away from bikes for a few years, I've recently purchased at auction a Suzuki Across in decent nick. However, it won't start!
    I have dropped the old fuel and replaced. Dropped the old engine oil and replaced. Replaced all four spark plugs. Replaced the air filter.
    While looking in the airbox, the filter and case had a fair amount of fuel in there, which makes me think the carburettors are at fault. I'm not sure I have the mechanical ability to strip them off and clean the floats and needles etc, so I've sprayed half a can of carburettor cleaner in through the carby air intakes.
    After all this, the bike will only start with the choke on full and any movement of the choke or throttle causes the motor to die instantly.

    I've uploaded a video yo Youtube of it running ->

    Any opinions or advice would be appreciated!
     
  2. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    Welcome.

    The bike sounds healthy on the choke (which is actually a fuel enrichment). I noticed that you are giving it full choke to to start it. Unless the temperature is approaching 0 degrees, that should not be necessary.

    My guess is that the the jets are blocked from the bike sitting so long with old fuel in it.

    If you leave the bike running on the choke and get some heat into the carbs, along with very slowly creeping the throttle open, you may be able to get the jets unblocked enough for the bike to run. Then you should take it for a ride and get it to operating temperature and let the fan cycle a few times.

    Otherwise, you will need to take the carbs off, remove the jets and physically clean them. Threebond Engine Conditioner is good for cleaning out jets. Or an ultrasonic cleaner if you have one.
     
  3. Daniel Schmidt

    Daniel Schmidt Member

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    Thanks Linkin - carby cleaning is what i was afraid the answer would be! I'm not sure I have the knowledge or talent, but ill take a methodical approach...
    Yes, the bike will ONLY start with the choke on full, othereise it won't catch...
     
  4. Daniel Schmidt

    Daniel Schmidt Member

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    Also good advice - I'll try this first!
     
  5. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    Emphasis on the 'slowly' part. What you want is for the revs to drop down without the bike stalling, then close throttle and repeat. If you stall it, just try again.
     
  6. Andych

    Andych Moderator Staff Member Premium Member Contributing Member Dirty Wheel Club

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    I would try running Threebond through the carby when it is running.. after all.. this stuff was meant to be an Upper Cylinder cleaner for Subaru wast it?
    Just like the old Redex back in the day...
     
  7. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    It needs to go through the jets though, ie fuel supply, going through the throttle body won't do much for whats inside the float bowl :)
     
  8. my67xr

    my67xr Bike Enthusiast Staff Member Premium Member Contributing Member

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    Threebond make's the rubber's swell too, so running it through the carby's could cause some issue's
    Sound's like it might need the fuel bowl's to be removed and the jet's cleaned properly
    Linkin my FZR need's full choke to start it the first start of the day, but after 20 second's i can drop it back a bit, after 1 minute it doesn't need it anymore

    Welcome to the forum Daniel
     
  9. Daniel Schmidt

    Daniel Schmidt Member

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    I've taken the tops off the carbies - they look remarkably clean inside, no obvious wear or damage to the needles / floats or diaphragm.
     

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  10. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    You need to take the float bowls off and look at the jets
     
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  11. Andych

    Andych Moderator Staff Member Premium Member Contributing Member Dirty Wheel Club

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  12. Daniel Schmidt

    Daniel Schmidt Member

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    Thanks Andy - that article is a great resource - I'd found and read it already! My main takeaway from the article is that I probably don't have the skills or tools to do it properly!
     
  13. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    You've already had the tops of the carbs off, if you can do that then and get them back together without messing that up, you are more than capable of servicing them. About the only special tool you will need is a JIS screwdriver, and some good flathead drivers for removing the jets without damaging them
     
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