2012 yfz 450 cutting out

[manual369]

Okay so I need a little help

just picked up a brand new 2012 yfz450 carb model

being that it was a left over I thought my cutting out issue was bad fuel

but even after draining the tank and putting fresh gas in it

after riding for about 20-30 min in the trails

if I hit the throttle wide open it cuts out bad (doesn't die though)

it won't even climb hills

and the one time it was so bad my buddy beat me on a stock 300ex

my yfz is completely stock

no mods at all and I have tried taking it back to dealer

but since it mainly is after some trail riding

they can not replicate the problem

someone plz help

I've only been able to ride this for one tank

of gas being its running like chit and have to turn home at big hills my buddys chit quads climb right up

Edited August 14, 2013 by quadnut20

[quadnut20]

Okay so I need a little help

just picked up a brand new 2012 yfz450 carb model

being that it was a left over I thought my cutting out issue was bad fuel

but even after draining the tank and putting fresh gas in it

after riding for about 20-30 min in the trails

if I hit the throttle wide open it cuts out bad (doesn't die though)

it won't even climb hills

and the one time it was so bad my buddy beat me on a stock 300ex

my yfz is completely stock

no mods at all and I have tried taking it back to dealer

but since it mainly is after some trail riding

they can not replicate the problem

someone plz help

I've only been able to ride this for one tank

of gas being its running like chit and have to turn home at big hills my buddys chit quads climb right up

Clean that carb out ! I bet there something in there ! Why did u get the fuel injection model ??

[quadnut20]

Clean that carb out ! I bet there something in there ! Why did u get the fuel injection model ??

How does it idle??

[manual369]

Idles good but have to give it gas to start and the dealer said they cleaned the sh** out of it when I took it back with the issue

[EV-2012YFZ450]

I had the same issue and took it to the dealer multiple times and they also couldn't replicate the issue. The solution I found was to take off the Air Box cover...the issue is that there isn't enough air. If that works then you can purchse a different filter like a bolt on one that doesn't require the air box cover. I can find the one I got and if that helps, but try to take the air box cover off and see if that does the trick. Good luck!

[CRAZYKIWI]

Yes the jetting wont be right until u remove the airbox lid. Is there a restrictor in the exhaust as well??