FJowners.com

General Category => Yamaha FJ1100 / FJ1200 Running Problems => Topic started by: irishluck on April 02, 2011, 09:33:19 PM

Title: 3rd carb popping
Post by: irishluck on April 02, 2011, 09:33:19 PM
so i had to replace a cylinder head cover bolt, got it replaced, put carbs bk on and hooked lines up.  turn the bike on and idles fine. when i go to rev it up, the third carb from the left makes a popping noise and  a white puff of smoke comes out of the back of the carb

anyone knopw whats going on?
Title: Re: 3rd carb popping
Post by: SlowOldGuy on April 02, 2011, 10:29:02 PM
Several possibilities:
Lean idle circuit
Cracked plug or questionable plug wire
Leaking vacuum plug on synch port.

DavidR.
Title: Re: 3rd carb popping
Post by: ribbert on April 03, 2011, 04:24:16 AM
 It could even be crossed leads. Some combinations could produce those symptoms and if revving stationary, not particularly noticeable at idle. It's at least worth checking - always eliminate the obvious and the easy first.
Noel
Title: Re: 3rd carb popping
Post by: irishluck on April 03, 2011, 04:36:01 AM
ya but it was weird cause  right before i replaced the head cover bolt it ran just fine
Title: Re: 3rd carb popping
Post by: ribbert on April 03, 2011, 04:46:30 AM
Quote from: irishluck on April 03, 2011, 04:36:01 AM
ya but it was weird cause  right before i replaced the head cover bolt it ran just fine


My Irish is a bit rusty.  Does this mean it's fixed?
Title: Re: 3rd carb popping
Post by: irishluck on April 12, 2011, 10:30:24 AM
well it is now, just found out a couple drops of water got into it. That's why it popped and had a puff of white smoke out the back of carb