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Chrissb6
Joined: 11 Jan 2012 Posts: 33 Location: Nottingham
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Posted: Fri May 08, 2020 11:04 pm Post subject: Strange one this one! |
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Hi Guy's sorry me again,
having sorted the starter solenoid issue thanks to Jonny, the bike been filled up with fresh fluids, the fuel pump been taken out and bye passed as recommended. Went to go for a start up using an aux fuel tank which was hung from a beam from the garage roof "so plenty of head". No 1 and 2 cylinders fired up almost straight away but nothing from 3 and 4, I've double checked the fuel lines everything correct there, tried again, again the same.
I'm puzzled if l'm correct, the cylinders on the ignition circuit 1&4 and 2&3 are paired - connected together so doubting it's a coil or electrical that leaves fuelling but to loose both cylinders strange one. Any pointers - ideas of a fix or a reason for this problem much appreciated.
Cheers _________________ Live for the Moment |
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brian
Joined: 22 Aug 2011 Posts: 3769 Location: Australia
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Posted: Fri May 08, 2020 11:29 pm Post subject: |
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Are 3 & 4 getting spark Chris? I’ve had spark plugs fail on my 6 in the past, but not 2 at the same time. Going by what you’ve described, there should be no reason for it to be a fuel issue if all you’ve done is remove the pump. _________________ '99 DB4 #104, '96 SB6 #1165, '94 DB2 J #652, '99 DB4 #088, '08 VTX1800, '93 ZXR750R M1, '95 ZXR750, '95 ZXR750 Race Bike, '94 CBR400rr NC29 Race Bike, '94 CB250, '49 BSA C10 250, '61 BSA A10 650, '89 ZXR750, '91 Ducati 851 |
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Jonny B Bad
Joined: 05 Dec 2009 Posts: 555 Location: NE London
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Posted: Sat May 09, 2020 11:03 am Post subject: 6r |
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Have you connected the fuel pipe into 3 & 4? Has it stood for a long time - do you need to re-furb the carbs? _________________ What, Jonny's gone! |
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Jonny B Bad
Joined: 05 Dec 2009 Posts: 555 Location: NE London
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Posted: Sat May 09, 2020 11:07 am Post subject: 6r |
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Are the carbs balanced? How many turns on the mixture screws? _________________ What, Jonny's gone! |
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Chrissb6
Joined: 11 Jan 2012 Posts: 33 Location: Nottingham
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Posted: Sat May 09, 2020 12:55 pm Post subject: Re: 6r |
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Jonny B Bad wrote: |
Have you connected the fuel pipe into 3 & 4? Has it stood for a long time - do you need to re-furb the carbs? |
Hi Jonny, had the carbs on the bench float chambers off and checked they were in very good shape to be honest. T piece fitted to the fuel line from the tank l suppose one line to 1&2 carbs and the other to 3&4 . I'm thinking of an air lock to 3&4 but my aux tank has more than enough head to force fuel through l would hope? I'm thinking it's fueling being it's 3&4 _________________ Live for the Moment |
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Jonny B Bad
Joined: 05 Dec 2009 Posts: 555 Location: NE London
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Posted: Sat May 09, 2020 1:09 pm Post subject: 6r |
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Yes, sounds like fuel to me. Water in the float bowls? _________________ What, Jonny's gone! |
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Jonny B Bad
Joined: 05 Dec 2009 Posts: 555 Location: NE London
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Posted: Sat May 09, 2020 1:15 pm Post subject: 6r |
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Have you connected the aux tank with a t piece or a y piece? Perhaps you’ve got too much head of fuel for 3 & 4 and it’s overwhelming the float valves, to give you too high a fuel level in those carbs for the pilots to do their thing. _________________ What, Jonny's gone! |
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Chrissb6
Joined: 11 Jan 2012 Posts: 33 Location: Nottingham
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Posted: Sat May 09, 2020 3:03 pm Post subject: |
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Give me strength, believe it or believe it not, 2 duff spark plugs on 3 and 4. A new set fitted now all good
Thank's for your support and backup fellas _________________ Live for the Moment |
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brian
Joined: 22 Aug 2011 Posts: 3769 Location: Australia
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Posted: Sun May 10, 2020 12:55 am Post subject: |
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Chrissb6 wrote: |
Give me strength, believe it or believe it not, 2 duff spark plugs on 3 and 4. A new set fitted now all good
Thank's for your support and backup fellas |
That’s why I suggested checking the spark first. As I said, spark plugs do seem to fail in these bikes, but having two go at the same time is unusual. Glad you got it sorted _________________ '99 DB4 #104, '96 SB6 #1165, '94 DB2 J #652, '99 DB4 #088, '08 VTX1800, '93 ZXR750R M1, '95 ZXR750, '95 ZXR750 Race Bike, '94 CBR400rr NC29 Race Bike, '94 CB250, '49 BSA C10 250, '61 BSA A10 650, '89 ZXR750, '91 Ducati 851 |
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2bims
Joined: 03 Apr 2010 Posts: 7292
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Posted: Sun May 10, 2020 8:15 am Post subject: |
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Maybe one was on its way out....and the strain on its adjoining cylinder put paid to the other one....Light bulbs in series are like that....one blows....dont replace it quick enough...and the other blows due to it receiving an increased load..... |
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Evilchicken0
Joined: 12 May 2010 Posts: 2996 Location: London
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Posted: Mon May 11, 2020 9:59 pm Post subject: |
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Dont use iridium plugs in these engines they foul very quickly. _________________ Don't read everything you believe |
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