1200 bandit idle problems please help

2000zx7r · 08-10-2009, 10:23 PM

ok im trying to help my friend. when he starts the bike the iddle keeps backfireing when it does you hear a click and pressure building then releasing if you look at the rubber boot that connectsthe carbs to the head you can feel that the pressure is building in the rubber boot and seems like it is going back to the carbs. any help would be awsome

kc9afz · 04-03-2011, 10:13 PM

I have about the same thing but mine is pumping oil out the pipe.

SGTFever · 04-05-2011, 06:44 PM

Hey 2000zx - Is it spitting or backfiring. Spitting would almost certainly be a vacuum leak. Backfiring is probably a bad valve. When was the last time you cleaned the carb's..? Spray some carb cleaner around all the intake boot's. If that Idle shoot's up it's a vacuum leak for sure. It can leak from where the boot meet's the manifold ( O ring or gasket..? ) where the carb's attatch to the boot's or the boot's could be so cracked and dried that getting a good seal is nearly impossible. The carb cleaner will tell the tale. I just bought an 87 Gsxr 1100 that was'nt taken care of and had to clean the carb's out,take out and replace all the jet's (and re-jet) and I am still waiting on the new manifold's.It was a total mess...!!

Martin Grise · 02-21-2012, 01:31 PM

I have a 2004 bandit 1200s last year I deceded to replace the exhaust for a slip-on yosh.

The carb must be recalibrate. And now it seem ok.

regards

rexmitchell · 02-21-2012, 04:03 PM

Thread is old and dead....closed

08-10-2009, 10:23 PM	#1
2000zx7r Motorcyclist Join Date: Jul 2009 Posts: 7	1200 bandit idle problems please help ok im trying to help my friend. when he starts the bike the iddle keeps backfireing when it does you hear a click and pressure building then releasing if you look at the rubber boot that connectsthe carbs to the head you can feel that the pressure is building in the rubber boot and seems like it is going back to the carbs. any help would be awsome

02-21-2012, 01:31 PM	#4
Martin Grise Newbie Join Date: Feb 2012 Location: St-Eustache, qc, canada Posts: 5	I got the same problem I have a 2004 bandit 1200s last year I deceded to replace the exhaust for a slip-on yosh. The carb must be recalibrate. And now it seem ok. regards

02-21-2012, 04:03 PM	#5
rexmitchell Administrator Join Date: Jan 2008 Location: THE ATX Posts: 14,552	Thread is old and dead....closed __________________ To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. You may all go to Hell, and I will go to Texas. - Davy Crockett

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04-03-2011, 10:13 PM	#2
kc9afz Registered Join Date: Apr 2011 Posts: 2	I have about the same thing but mine is pumping oil out the pipe.

04-05-2011, 06:44 PM	#3
SGTFever Verified Join Date: Feb 2011 Location: Ocala/Florida Posts: 40	Hey 2000zx - Is it spitting or backfiring. Spitting would almost certainly be a vacuum leak. Backfiring is probably a bad valve. When was the last time you cleaned the carb's..? Spray some carb cleaner around all the intake boot's. If that Idle shoot's up it's a vacuum leak for sure. It can leak from where the boot meet's the manifold ( O ring or gasket..? ) where the carb's attatch to the boot's or the boot's could be so cracked and dried that getting a good seal is nearly impossible. The carb cleaner will tell the tale. I just bought an 87 Gsxr 1100 that was'nt taken care of and had to clean the carb's out,take out and replace all the jet's (and re-jet) and I am still waiting on the new manifold's.It was a total mess...!!