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CBR backfiring at start up and slight coughing

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Jefr0
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Joined: 29 Jul 2007
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PostPosted: 13:14 - 31 Jan 2013    Post subject: CBR backfiring at start up and slight coughing Reply with quote
Hi all

My CBR has been doing it quite a bit lately, starting it up early morning, it's turning over but back fires LOUD and was wondering what might cause this?

It sometimes stutters and coughs when riding too if I accelerate quick.

Read a topic below about replacing the rec (have done in past)

Wern't sure if it was something to do with a job I'm doing soon (Valve clearances and new spark plugs) - not touched in 6 years of ownership Embarassed

Cheers Karma
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Rides: Honda XR 125 ('03) Honda CBR 600F ('91), Ducati 916 Biposto ('95)
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bikenut
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Joined: 21 Nov 2011
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PostPosted: 16:53 - 31 Jan 2013    Post subject: Reply with quote
better late than never although............
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Bikeless
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Joined: 27 Jun 2008
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PostPosted: 16:57 - 31 Jan 2013    Post subject: Reply with quote
Loose or dirty plugs can cause hard starting and backfiring.
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StevenF
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Joined: 25 Apr 2008
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PostPosted: 16:56 - 01 Feb 2013    Post subject: Reply with quote
No Blade wrote:
Loose or dirty plugs can cause hard starting and backfiring.


Yep! I had the same issue with my CBR, eventually I changed the spark plugs and everything went back to normal.

Take them out and see how they look, also check and make sure the spacing is correct.
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