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BB1
Joined: 03 Nov 2008 Posts: 52
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Posted: Thu Jun 25, 2009 10:29 pm Post subject: Starts but won't rev- The fix! |
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Ok, this has happened about 5 times now and the fix is a relatively simple affair.
Symptoms:
The bike starts but as soon as you try and rev it, it dies.
The reason:
White crystaline deposites blocking the pilot jets
The Fix.
Stip the carbs off the bike, open the float bowls one at a time and unscrew the pilot air jet down the tube next to the main jet. Clear it out with a fine piece of copper wire. Blow out tube.
Repeat with the other side.
clean out the bottom of the float bowls with carb cleaner and reassemble.
I haven't traced the white crystaline substance yet but it keeps coming back from somewhere. Even with fresh petrol.
Cheers,
Carl |
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BB1
Joined: 03 Nov 2008 Posts: 52
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Posted: Thu Jul 02, 2009 2:53 pm Post subject: |
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Update:
The white solid turned out to be old "varnish" inside the fuel system from the bike sitting in storage with fuel in it. The detergents in the new fuel has been cleaning it off the insides of the carbs and tank.
Hopefully it's now cured.
Cheers, C |
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bimotanige
Joined: 12 Jul 2010 Posts: 582 Location: yorkshire
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Posted: Thu Jul 19, 2012 4:56 pm Post subject: |
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only blocked up 1 of the carbs this time - getting there! |
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brian
Joined: 22 Aug 2011 Posts: 3770 Location: Australia
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Posted: Fri Jul 20, 2012 1:01 am Post subject: |
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Thanks for the info.
Maybe you should consider adding an inline fuel filter.
Maybe something like this - http://www.ebay.com.au/itm/310385327525?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2648 _________________ '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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bimotanige
Joined: 12 Jul 2010 Posts: 582 Location: yorkshire
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Posted: Sat Jul 21, 2012 9:38 am Post subject: |
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Hi Brian, wish it was that easy. The fuel actually dissolves the varnish then it crystallises out if you don't run the bike for a couple of weeks and the carbs dry out. Guess I'll have put a switch into the fuel pump circuit so I can run the carbs dry after riding |
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2bims
Joined: 03 Apr 2010 Posts: 7292
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Posted: Sat Jul 21, 2012 10:58 am Post subject: |
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bimotanige wrote: |
Hi Brian, wish it was that easy. The fuel actually dissolves the varnish then it crystallises out if you don't run the bike for a couple of weeks and the carbs dry out. Guess I'll have put a switch into the fuel pump circuit so I can run the carbs dry after riding |
cheaper than a switch, and if you have access to a visible fuel line is simply clamp it when running to shut the fuel off, even a sandwich plastic bag clamp works, you know the lock and seal clip type
Cheapness should be appealing, espec when you only need it when storing |
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