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missing coolant

Discussion in 'Yamaha 250cc In-Line 4's' started by Dave71, Aug 3, 2009.

  1. Dave71

    Dave71 New Member

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    hi i've been filling in coolant for my bike, last week, i drained the coolant, flushed everything clean, and then put in new coolant. this is what i did in steps

    1. flush coolant from the hose that connects to the impeller housing.
    2. filled in coolant from the radiator.
    4. started the motorcycle, let it idle, and wait for air bubbles to come up, as coolant leve decrease, i fill in more coolant into the system from rad cap.
    3. filled in coolant from the reservoir that's under passenger seat.
    5. close rad cap.

    note, when i check out the bike, and when i was idling extensively (approx 5 minute, no visible external leak was observed.)

    I had a friend to ride the bike home on highway going at 110km/h. approximately rode from 20 minutes in total. and the bike odo meter says it moved 22km.

    when the bike left the shop, reservoir tank was on FULL. when the bike got to my house the coolant tank was below low right now.

    any idea? is that mornal, thanks in advance
     
    Dave71, Aug 3, 2009
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  2. dave

    dave Well-Known Member

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    There may have been some air trapped in the system still.. The time to check the water is when it is cold. The radiator sucks any required water from the reservoir when cooling. Keep the reservoir half full until it takes no more water over a few ride and cooling cycles at which point it should stabilize.. If it don't, you have a problem.
     
    dave, Aug 3, 2009
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  3. glen5122

    glen5122 New Member

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    when filling up the coolent it is a painfully slow process. it should take about under a litre. i find it helps to tilt the bike left and right to realese the air. also once i think it is full i will give it a start one ouick rev and switch it off and fill again.
     
    glen5122, Aug 7, 2009
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  4. Dave71

    Dave71 New Member

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    found out what the problem is..

    the tip of the over flow hose on the reserve tank is not sealing, so as i ride the bike, the coolant just keep on getting squirt out.... =.=''

    just placed an order for that hose at my local yamaha dealer.

    Thanks for all the help

    next thing i gotta do is tighten the chain... now i can't seem to find any info on the torque spec of the wheel stud on the rear wheel.. any idea guys?
     
    Dave71, Aug 22, 2009
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  5. dave

    dave Well-Known Member

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    Good that you managed to track down the problem with the missing water..

    The back axle bolt 110n/m (73 lb/ft) torque.
     
    dave, Aug 22, 2009
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