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View Full Version : YZ450f Motor in 400EX frame


Chino886
11-29-2005, 08:49 AM
Has anyone ever heard of this setup? I love my 400ex frame and the suspension on it, and don't want to get rid of it.
stc416rider
11-29-2005, 01:05 PM
im sure it could be done

that would be soooo sweet

i love the feel of the 400

i bet ud need 2 get a new and longer swing arm to handle the power:muscle:
Chino886
11-29-2005, 01:08 PM
Originally posted by stc416rider
im sure it could be done

that would be soooo sweet

i love the feel of the 400

I personally like the ride better than a 450R....

Maybe it was a Honda 450F engine, I know one of them dropped in and fit perfect, someone told me they read it in Dirt Wheels magazine....

Anyone else heard of this....:devil:
stc416rider
11-29-2005, 01:29 PM
ive never rode the 450 but i rode a yfz and i dont like the feel of it
Chino886
11-29-2005, 01:31 PM
Originally posted by stc416rider
ive never rode the 450 but i rode a yfz and i dont like the feel of it

nothing better than current setup and 450 power....:devil:
frankiedizzle56
11-29-2005, 04:22 PM
i heard of the yz450 motor in the 400 i was thinking about geting it in a year or two
stc416rider
11-29-2005, 04:30 PM
do u have an engine now:confused:
Chino886
11-29-2005, 08:18 PM
Originally posted by stc416rider
do u have an engine now:confused:

yeah, i have the 400ex motor in there.....
hskers82
11-29-2005, 08:35 PM
Check in the thread.Someone posted a name for a company that does the conversion.I am in the middle of putting a yz426 motor into a 400ex chassis to race TT.Should handle great and be fast
Chino886
11-29-2005, 08:38 PM
Originally posted by hskers82
Check in the thread.Someone posted a name for a company that does the conversion.I am in the middle of putting a yz426 motor into a 400ex chassis to race TT.Should handle great and be fast

what thread?
hskers82
11-29-2005, 08:42 PM
Try www.atvfourplay.com
Chino886
11-29-2005, 09:20 PM
Originally posted by hskers82
Try www.atvfourplay.com

any idea how much it costs?
K_Fulk
11-29-2005, 09:44 PM
JB racing does it too.

Your looking at least $1500+ the cost of the motor ,carb and electronics.

With the yzf conversion you need to fab up oil tank mounts and /or a custom oil tank, so that will add to your cost more.
Chino886
11-29-2005, 09:46 PM
Originally posted by K_Fulk
JB racing does it too.

Your looking at least $1500+ the cost of the motor ,carb and electronics.

but nothing rides like a 400 IMO....
K_Fulk
11-29-2005, 09:49 PM
Originally posted by Chino886
but nothing rides like a 400 IMO....

You havent rode a 250r enough. :p

The crf\ex conversion rides better than a regular 400, its amazing what a 30 pound weight reduction will do.
Chino886
11-29-2005, 10:10 PM
Originally posted by K_Fulk
You havent rode a 250r enough. :p

The crf\ex conversion rides better than a regular 400, its amazing what a 30 pound weight reduction will do.

i've never ridden a 250R...I only wish I had one....

I am going to race the 400 as it sits now, and then I will probably do it next winter...
ss440ex
11-29-2005, 10:38 PM
There is a noticeable weight difference!!
Chino886
11-29-2005, 10:42 PM
Originally posted by ss440ex
There is a noticeable weight difference!!

who did your work, where did you find the engine.....

what is the HP difference......
ss440ex
11-30-2005, 10:46 PM
I did the work,
Out of the bike,sold remaining on e-bay
Big difference!!
Chino886
11-30-2005, 10:48 PM
Originally posted by ss440ex
I did the work,
Out of the bike,sold remaining on e-bay
Big difference!!

I guess I should have read your signature........

I will be in contact when I find the engine....
beasttoy2000
08-28-2006, 05:30 AM
how much do you sell your conversion kits for? :p
krt400ex
08-28-2006, 07:36 AM
Originally posted by Chino886
I personally like the ride better than a 450R....


x2, that's why i am going to do a 450r hybrid in a couple of yrs
TRX23rider
08-28-2006, 08:21 AM
this thread is almost a yr old
400exMO
08-28-2006, 11:50 AM
Yeah, his 400 has been parted and he has an 06 r.