PDA

View Full Version : 250r engine in 400ex frame?


NikNacs67
12-13-2003, 08:06 PM
Hey guys, im thinkin about putting a 250r motor in my 400ex frame. Anyone wanna gimmi tips, know hows and info on this?
sprtrx300ex
12-13-2003, 08:40 PM
Heres a site:



http://www.servicehonda.com/TRX250r.html
NikNacs67
12-13-2003, 09:49 PM
Can I do it without that kit or w/e that is?
Woodsrider
12-13-2003, 10:15 PM
Sure you could. But by the time you got done it would be about the same cost, once you factor in all your time and effort.

Why not put in a 426 or a 450?
Diedrich
12-13-2003, 10:16 PM
yeah u can do it without the kit..just custom make some mounts..a couple other things might have to be modified but i dont think it would be that hard
NikNacs67
12-14-2003, 07:30 AM
Would I get the complete wiring system from a 250r? Will anything be in the way of the kickstarter?
hondaracer3x
12-14-2003, 09:10 AM
i have a CR250 in a 400ex frame, and the vibration cracks the frame a lot, but its very fast, in a straight line it will almost keep up with a CR250 dirtbike
NikNacs67
12-14-2003, 11:24 AM
What if i use a 250r motor?
Tommy 17
12-14-2003, 12:49 PM
adam sick did it... i know theres some old topics about 2 years ago on this... he built a 400ex that he could put a yz426 and a 250r motor in with just the switch over the motor mounts... it was pretty cool...
4wheelboy
12-14-2003, 01:01 PM
Originally posted by NikNacs67
What if i use a 250r motor?
it would vibrate less
Diedrich
12-14-2003, 08:38 PM
250r motor shouldnt vibrate anymore than the 400ex motor..just dont use a cr250 motor because it isn't counterbalanced
NikNacs67
12-14-2003, 09:39 PM
Can you guys get any pics of a 250r motor mounts (in frame) and the motor?
f1502nv
12-15-2003, 01:15 AM
ask z400rider23 he did it without the kit!!!!!!!!!!!!!
exatak199
12-15-2003, 01:41 PM
tell mee something guys you all say that it would vibrate bad with a CR engine in a EX frame well then tell mee why all dirt bikes don't have counter balancers and work fine without????just rubber mount it and it and it would be fine:blah:
nacs400ex
12-15-2003, 02:58 PM
Originally posted by exatak199
tell mee something guys you all say that it would vibrate bad with a CR engine in a EX frame well then tell mee why all dirt bikes don't have counter balancers and work fine without????just rubber mount it and it and it would be fine:blah:

It doesnt affect a dirtibike because the vibrations travel down through the front forks.

Also why would you put a 250r motor into a 400ex, just stick with the darn R !
NikNacs67
12-15-2003, 03:01 PM
Cuz I picked up a 400ex frame for $161.
NikNacs67
12-15-2003, 11:01 PM
Anymore info?