Bought 08 Yfz450 Carb Problems? - Yamaha YFZ450 Forum : YFZ450, YFZ450R, YFZ450X Forums

raiderryan · 07-08-2008, 03:33 PM

yes ibought a 08 yfz 450 and it coughed , stalled or die,a lot when i first bought it i was told when i added pipes and filter and jeted and would stop doing that but when i added pipes it got better but if i try to hit gas fast it still coughs or dies if i ease in to it then nail it its fine i was told this normal from the dealer is that right has any one else had this problem this is my first yfz. thanx for the help.

matt05 · 07-08-2008, 04:20 PM

Quote:

yes ibought a 08 yfz 450 and it coughed , stalled or die,a lot when i first bought it i was told when i added pipes and filter and jeted and would stop doing that but when i added pipes it got better but if i try to hit gas fast it still coughs or dies if i ease in to it then nail it its fine i was told this normal from the dealer is that right has any one else had this problem this is my first yfz. thanx for the help.[/b]

Searh for the BOG FIX. I believe it is sticky'd in the powertrain section. It is some what normal. Proper jetting usually makes it a very small bog. I don't notice any bog. I have an 07 and what really helped it was the adjustable needle which they stopped putting in. I know for sure they are not in 07 or 08.

**husker525** · 07-08-2008, 04:58 PM

Adjustable needles on 04-06, but just buy an NCVQ needle from the dirt bike and save yourself hassles in the long run. Turn up you idle a bit too, that will help minimize the bog. I have had 3 YFZ's, and with jetting changes, needle changes and turning up the idle, I have gotten rid of the bog.

Troyboy08 · 01-25-2012, 09:42 PM

I have been watching on youtube about the zip tie mod has anyone done it and does it work?

450crazy · 01-25-2012, 09:44 PM

YES and YES

450crazy · 01-25-2012, 09:45 PM

and holy crap this was started in 08

07-08-2008, 04:58 PM	#3 (permalink)
husker525 Police Patrol Join Date: Sep 2005 Location: Parker, Colorado Posts: 3,103	Adjustable needles on 04-06, but just buy an NCVQ needle from the dirt bike and save yourself hassles in the long run. Turn up you idle a bit too, that will help minimize the bog. I have had 3 YFZ's, and with jetting changes, needle changes and turning up the idle, I have gotten rid of the bog. __________________ TEAM TRIGGER RACING (Now sponsored by AMSOIL, Vickery Motorsports, MotoXNutrition,DZ Graphics, Engine Ice, DeRisi Racing, Team Ape, Cosworth Pistons, Hiper, Lonestar Racing. Terse 07 Race engine 2007 Blue YFZ: Venom 14:1 piston, Cam Mod, Jardine RT4 Exhaust, 175 main, 45 pilot, 04 needle 3rd clip/ 3 t Become a fan of Team Trigger Racing on Facebook!!!

07-08-2008, 03:33 PM	#1 (permalink)
raiderryan Junior Member Join Date: Jul 2008 Posts: 1	yes ibought a 08 yfz 450 and it coughed , stalled or die,a lot when i first bought it i was told when i added pipes and filter and jeted and would stop doing that but when i added pipes it got better but if i try to hit gas fast it still coughs or dies if i ease in to it then nail it its fine i was told this normal from the dealer is that right has any one else had this problem this is my first yfz. thanx for the help.

01-25-2012, 09:42 PM	#4 (permalink)
Troyboy08 Junior Member Join Date: Jan 2012 Location: Berkeley springs WV Posts: 1	I have been watching on youtube about the zip tie mod has anyone done it and does it work?

01-25-2012, 09:44 PM	#5 (permalink)
450crazy Senior Member Join Date: May 2006 Location: south dakota Posts: 459	YES and YES

01-25-2012, 09:45 PM	#6 (permalink)
450crazy Senior Member Join Date: May 2006 Location: south dakota Posts: 459	and holy crap this was started in 08

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