yfz carb in 400 ex

will the stock yfz carb fit on a 400 ex? its an fcr 39 right?

I have never heard of its been used or what the performance was like, but a 450r carb you can . :)

I have a yfz carb and it won't fit the 400ex. It's to tall for one and the fuel line on the carb would hit the frame. The airbox boot is bigger than the intake on the carb. I did a 450r carb and it worked great. Check out the 400ex section were I put pics on how it looks.

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Originally posted by Mobile Dyno
I have a yfz carb and it won't fit the 400ex. It's to tall for one and the fuel line on the carb would hit the frame. The airbox boot is bigger than the intake on the carb. I did a 450r carb and it worked great. Check out the 400ex section were I put pics on how it looks.

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I too done the 450r carb and I LOVE IT... :cool:
thats good to know about the YFZ carb.

What are the benefits of running a 450r carb?

heres a thread w/ more info

http://www.exriders.com/vbb/showthre...ight=450r+Carb