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Across' first Canberra winter - not coping with the cold :(

Discussion in 'Suzuki 250cc In-line 4's' started by sarahb, Jul 4, 2016.

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  1. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    Thats a ripper of a multimeter :thumb_ups: ..... love it :D
     
    GreyImport, Jul 12, 2016
    #61
  2. sarahb

    sarahb Well-Known Member

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    thanks!:confused: and the battery seems ok to you?
     
    sarahb, Jul 12, 2016
    #62
  3. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    Seems to be enough cranking going on there but Im guessing it just keeps cranking and theres no secondary signs of an imminent start ...?
     
    GreyImport, Jul 12, 2016
    #63
  4. sarahb

    sarahb Well-Known Member

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    correct. but more i was asking about the voltage reading of the battery. i was sure the battery was good but people kept asking
     
    sarahb, Jul 12, 2016
    #64
  5. my67xr

    my67xr Bike Enthusiast Staff Member Premium Member Contributing Member

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    Battery volt's look alright,
    you'll need to give it a good run once you get it going to give it a good charge, half an hour to an hour riding should get the voltage back up

    When you are cranking it over have you tried a touch of throttle ? (No choke)
    Try just holding it where it take's up the slack in the throttle cable, and crank it for 10 second's or so.
    If that still doesn't make it fire try turning the throttle a mm more and crank it for 10 seconds'
    See if that make's any difference
    You will hear the engine noise get a little deeper if you open it too much.
     
    my67xr, Jul 12, 2016
    #65
  6. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    Might be time for some aerostart or start ya bastard. You only need to give it a little sniff down each throttle body.
     
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    Linkin, Jul 12, 2016
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  7. Phil

    Phil Senior Member Contributing Member

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    My sentiment exactly.
     
    Phil, Jul 12, 2016
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  8. ruckusman

    ruckusman White Mans Magic Master Premium Member Dirty Wheel Club

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    are we even certain this thing is even giving a spark at all?

    OK just re-read the previous page

    the sparks is sparking

    - blocked fuel filter?
     
    ruckusman, Jul 12, 2016
    #68
  9. sarahb

    sarahb Well-Known Member

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    I buy a can of start ya bastard and spray it sparingly into the airbox??


    Sent from my iPhone using Tapatalk
     
    sarahb, Jul 12, 2016
    #69
  10. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    The starter fluid has to go into the throttle body / air intake.
     
    Linkin, Jul 12, 2016
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  11. sarahb

    sarahb Well-Known Member

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    do i need to remove the airbox?

    sorry - i don't want to go outside... its SNOWING :(
     
    sarahb, Jul 13, 2016
    #71
  12. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    Airbox can stay on if u can see the carby throats ..... just have the filter out ...... just spray a mist into each carb and try to start it straight away ...... if it coughs and splutters keep trying to start it ...... if not stop and give it another spray and try again ..... dont drown it though

    Try it with choke off , on , half on ..... no throttle , half throttle , full throttle ..... stand on your head and whistle dixie ...... anything :cool:

    ..... and when the sun comes out
     
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    GreyImport, Jul 13, 2016
    #72
  13. sarahb

    sarahb Well-Known Member

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    i love you guys :party:

    and i love 'start ya bastard'

    liquid gold

    how does it work?

    took maybe 10 to 15 goes but every time just a little bit more life was coming back into the across. a little more colour in her cheeks :)

    once i got it started i did the cylinder head clean with threebond as instructed. i noticed that all the (new) plugs were dry except for number 3, which just happenned to be the last one i did.. the lead plug (plastic one) was wet when i pulled it out and the spark plug itself was wet.. i put the threebond in and waited as i had done with 1, 2 & 4 and it blew a lot of smoke.. .which i was expecting with all four plugs but was only in number 3, the last one.

    curious what thats about if anyone knows..

    went for a nice long sunny day ride with plenty of speed and revvs to blow out as many cobwebs as i could ;)

    still does the inconsistent rev thing while idling but the engine sounded great and was so nice to ride.
    ((i test rode a honda cbrr300 2015 last weekend and that thing was like a tinny vibrating lawnmower in comparison. ))

    so grateful to you guys for all your help and advice.

    knowing this should i just put it down to some crap that needed to be sucked through and forget about it or should i get serious about getting into the bottom of the carbs to clean the jets or.. ?

    thanks again everyone
     
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    sarahb, Jul 16, 2016
    #73
  14. my67xr

    my67xr Bike Enthusiast Staff Member Premium Member Contributing Member

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    Carby's might need a clean out if you have never done them, they have a lot of km's on them
    All the smoke from cylinder 3 i'm guessing the plug wasn't firing properly and it had built up a lot of carbon/oil in the cylinder and combustion chamber.
    The valve guide'/seal's may also bee leaking a little with the age of them, so it might have had a bit built up on the exhaust valve stem's inside the exhaust port too.
    The Threebond would have loosened it up, and the smoke is from all the carbon/oil etc burning off/out and that cylinder should now be pretty clean internally, as with the rest of them
    You might have also gained a bit of compression if the caron/oil had built up around the piston ring's
     
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    my67xr, Jul 16, 2016
    #74
  15. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    Glad you got it going again, good work! :thumb_ups:

    What is the idle doing exactly? Is it sticking above idle when you blip the throttle open? Bogging down when you crack the throttle open quickly? Or a hunting idle (constantly fluctuating up and down without any input)

    Sometimes the return throttle cable can cause issues with the throttle not closing fully. I had one that frayed and broke in the throttle tube end, which caused the throttle to stay open. Open the throttle wide and let it go, it should snap shut and you should here the throttle plate hitting the stop on the carbs (also check that the throttle plate is hitting the stop - if not, needs a throttle body sync). If it sticks or closes slowly, you need to lube both throttle cables and the grip on the handlebar. Any type of grease should do. The fizzer factory used Inox MX8 which has teflon in it and is more 'grease in a can' than a liquid spray.

    The throttle bodies might need syncing, but this usually shows up as surging, or lumpyness/vibrations when riding a constant RPM. A 4 cyl bike should be really smooth. If its lumpy then there's an issue somewhere.
     
    Linkin, Jul 16, 2016
    #75
  16. sarahb

    sarahb Well-Known Member

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    if i'm riding and the bike is fully warm i can stop at the lights and the revvs will be around 3000.

    next lights they could be at 1500.. or 5000

    they never stay at 1500 for long. the bike will generally stall after a few seconds, maybe up to 10 seconds at anything under 2000

    the plastic covering of the throttle cable is worn where the boot rubs it against the cylinder head cover.. theres no way around this.

    i have a new throttle cable... i'm just so reluctant to pull the carbs (hence the previous issue perhaps - its all just jammed in there so tightly and i'm not confident. ) which i would have to do to attach one end of the cable.

    i've just been dealing with it for ages, using the stop idle knob to adjust if i'm at the lights and its revving too high

    sometimes have an issue with the high revving when turning the handle bars too - throttle cable
     
    sarahb, Jul 16, 2016
    #76
  17. Murdo

    Murdo The Good Doctor Staff Member Contributing Member Ride and Events Crew

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    Sounds like the new cable is needed.
     
    Murdo, Jul 16, 2016
    #77
  18. sarahb

    sarahb Well-Known Member

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    Bike wouldn't start this morning. At least not without 15 sprays of start ya bastard. Warm starts seen fine :(


    Sent from my iPhone using Tapatalk
     
    sarahb, Jul 17, 2016
    #78
  19. ruckusman

    ruckusman White Mans Magic Master Premium Member Dirty Wheel Club

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    OK work backwards, it can run, needs excessive start ya bastard to get running

    therefore highly plausible -> fuel flow problem, this would likely explain oscillating idle speed

    does it have a fuel pump? likely needs to be checked if it does. It could be inside the fuel tank -> continue

    no fuel pump but a vacuum assisted pet cock -> check for cracked vacuum line not opening the petcock

    not a vacuum assisted petcock, fuel tap instead - perhaps clogged fuel tap yielding insufficient flow, further up the chain, blocked fuel filter in the tank if it has one.

    no fuel filter installed ->

    All clear on the above, check the float bowls for gunk buildup

    is this poor starting problem more prevalent with less petrol in the tank?

    Sorry I am unfamiliar with the Across, so some of the above may be completely irrelevant, but work methodically through the system
     
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    ruckusman, Jul 17, 2016
    #79
  20. sarahb

    sarahb Well-Known Member

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    Thanks for that info. I've had other Advice that it's blocked pilot jet. Which are imperative to cold starts. Once the bike has started its smooth and great. No fuel delivery issues. I can then leave it 5 hours in Canberra winter day time and it starts. Just cold starts. Does that change things?

    Haven't done the jets since I've had the bike. Have done the rest of the fuel line. I keep chickening out.


    Sent from my iPhone using Tapatalk
     
    sarahb, Jul 17, 2016
    #80
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