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2-stroke backfiring

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prawny1
World Chat Champion



Joined: 28 Jun 2005
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PostPosted: 21:50 - 21 Mar 2011    Post subject: Reply with quote

Vincent wrote:
snaphappyalex wrote:
Have you checked float height in the carb?
An incorrect mixture wont burn properely...


The float height doesn't really have any effect on the mixture, it's just a valve to allow fuel in when required, works like a toilet systern.


If your float hieght is to high you can run rich or even flood at idle, some bikes revised float hieghts after release to prevent fouling at low revs.
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Avora
Renault 5 Driver



Joined: 08 Feb 2009
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PostPosted: 00:04 - 22 Mar 2011    Post subject: Reply with quote

If its bogging down like a deep bwwwaaaahhhhhh sound, thats lean...makes sense if it runs better on choke. So try screw the idle screw right in. If needs be take the carb off and look at the pilot jet and compare with the standard size, worst being you have to drill it out to test before you buy another jet. Definitely sounds like jets to me, my scooter was the same
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gwernybwch
Nova Slayer



Joined: 30 Jul 2008
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PostPosted: 23:57 - 22 Mar 2011    Post subject: Reply with quote

Avora wrote:
Definitely sounds like jets to me, my scooter was the same

Thanks for the reply, but I have recently posted what the problem was - a faulty ignition coil.

Thanks.
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Avora
Renault 5 Driver



Joined: 08 Feb 2009
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PostPosted: 12:51 - 23 Mar 2011    Post subject: Reply with quote

gwernybwch wrote:
Avora wrote:
Definitely sounds like jets to me, my scooter was the same

Thanks for the reply, but I have recently posted what the problem was - a faulty ignition coil.

Thanks.


Oooops my bad. Thumbs Up good work!
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Old Thread Alert!

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