Fire in Carb air intake chamber

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dmf1
Posts: 10
Joined: Sun Sep 28, 2008 12:55 pm

Fire in Carb air intake chamber

#1

Post by dmf1 » Sat Mar 07, 2009 9:31 pm

was trying to start my 67 shovel and gas in the carb air intake caught fire. It burned for a little while and I had a couple of more flare ups before the bike started and ran fine. anyone know why I would have had this fire? Its not something I have had happen before.



51Hog
Posts: 655
Joined: Fri May 20, 2005 7:29 pm
Location: Wasilla, Alaska

Re: Fire in Carb air intake chamber

#2

Post by 51Hog » Sun Mar 08, 2009 1:07 am

It was probably just flooded and backfired.
It does not necessarily mean that anything is wrong if the bike runs right.

Cotten
Posts: 6791
Joined: Mon Aug 26, 2002 9:09 am
Location: Central Illinois

Re: Fire in Carb air intake chamber

#3

Post by Cotten » Sun Mar 08, 2009 4:44 am

Improper timing or valve adjustment can cause a "frontfire" but by far the most common cause is a vacuum leak.

If the problem re-occurs,
Please pressuretest your manifold assembly as per http://virtualindian.org/11techleaktest.html to absolutely eliminate this possiblility, and avoid torching your machine to the ground.

....Cotten

51Hog
Posts: 655
Joined: Fri May 20, 2005 7:29 pm
Location: Wasilla, Alaska

Re: Fire in Carb air intake chamber

#4

Post by 51Hog » Sun Mar 08, 2009 5:19 am

Also, if the cylinder does not make it past tdc when cranking the machine while it is flooded can cause a front fire. Commonly called back fire through the carb.

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