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If your YFZ turns over but won't start...

This is a discussion on If your YFZ turns over but won't start... within the Yamaha YFZ450/450R (2004-Present) forums, part of the Performance /Technical category; put more gas in the tank....


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Old 02-17-2004, 02:14 PM   #1
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Default If your YFZ turns over but won't start...

put more gas in the tank.
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Old 02-17-2004, 02:16 PM   #2
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uh can i assume a step by step video of the so called "gas pouring process" will follow???? ;)
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Old 02-17-2004, 02:21 PM   #3
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I wound suggest making this a sticky.
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Old 02-17-2004, 02:25 PM   #4
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Default Re: If your YFZ turns over but won't start...

Quote: Originally Posted by screamin96
put more gas in the tank.
and if theres gas in the tank?



























try turning the gas on dummy!!!
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Old 02-17-2004, 02:27 PM   #5
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Hahaahahaha
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Old 02-17-2004, 03:59 PM   #6
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I found out that even though a YFZ appears to have gas in the tank, quite a bit of gas also, it will not reach the petcock.


And yes, a how-to video is on the way.
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Old 02-17-2004, 06:09 PM   #7
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i cant wait this has baffled me for a while
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Old 02-17-2004, 08:30 PM   #8
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We found that if a valve spacer comes loose, and sits in the space holder wrong you cant start it for beans.

We finally remembered BLUETRAXX and another guy had that problem, we checked the spacer and sure enough and an intake spacer slipped up sideways, and caused a slight pressure leak.

It will never start till you fix theat.

so if you did a piston change and it wont start, check the valve spacers, they move around WITHOUT removing the spacer covers.

just a tip.
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Old 02-17-2004, 08:37 PM   #9
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Quote: Originally Posted by screamin96
I found out that even though a YFZ appears to have gas in the tank, quite a bit of gas also, it will not reach the petcock.


And yes, a how-to video is on the way.
Has happened many times to me... get to the top of sand mountain and the damn thing starts to die WTF?

Go back to the trailer, check and yep - plenty of fuel in there. Filler up and walla... runs just fine.

Edit: It happened on K&T's dyno too. None of us could figure it out.
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Old 02-17-2004, 09:05 PM   #10
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Quote: Originally Posted by selector
Quote: Originally Posted by screamin96
I found out that even though a YFZ appears to have gas in the tank, quite a bit of gas also, it will not reach the petcock.


And yes, a how-to video is on the way.
Has happened many times to me... get to the top of sand mountain and the damn thing starts to die WTF?

Go back to the trailer, check and yep - plenty of fuel in there. Filler up and walla... runs just fine.

Edit: It happened on K&T's dyno too. None of us could figure it out.
Good, I don't feel so bad now. :D
Guess I'm used to the Banshee, where it is BONE DRY before it dies.
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Old 02-17-2004, 09:08 PM   #11
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Quote: Originally Posted by screamin96
Quote: Originally Posted by selector
Quote: Originally Posted by screamin96
I found out that even though a YFZ appears to have gas in the tank, quite a bit of gas also, it will not reach the petcock.


And yes, a how-to video is on the way.
Has happened many times to me... get to the top of sand mountain and the damn thing starts to die WTF?

Go back to the trailer, check and yep - plenty of fuel in there. Filler up and walla... runs just fine.

Edit: It happened on K&T's dyno too. None of us could figure it out.
Good, I don't feel so bad now. :D
Guess I'm used to the Banshee, where it is BONE DRY before it dies.
But it sure scares the hell out of ya for a minute don't it? What I do?
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Old 02-18-2004, 05:03 AM   #12
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yeah, wait till you get somewhat dry and riding wheelies and the level falls past the petcock intake and all your running on is fuel in the float bowl. stops a wheelie pretty fast if not sending you vertically forwards.
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Old 02-18-2004, 03:11 PM   #13
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Quote: Originally Posted by wildtxn
yeah, wait till you get somewhat dry and riding wheelies and the level falls past the petcock intake and all your running on is fuel in the float bowl. stops a wheelie pretty fast if not sending you vertically forwards.
been there at 20 mph on the grizz had the front end up nice and WAM it dies ill tell u that braking is not to be fooled with it WILL put u over the bars!
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Old 02-18-2004, 05:30 PM   #14
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Will it hurt anything to run with it on reserve from the get go? I'm racing in the Adelanto GP next week and wondering if I'll have enough fuel. Don't want it cutting out with 1/2 a tank left. So I figured why not just put it on reserve before I start. I'm guessing the "reserve" inlet is down lower than the "on" inlet - right? Is that the only difference?

- Scott
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Old 02-18-2004, 05:53 PM   #15
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You can run it on reserve with no problem, you jsut won't know when you're getting low on fuel till it's too late. :)
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