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08Honda400ex
06-13-2008, 04:56 PM
would it be possible to make a 400ex liquid cooled or would you have to swap the whole engine with a 450r engine?
blankenship
06-13-2008, 05:14 PM
Sorry there is no way to make a 400ex liquid without swaping the whole motor there is no water pump and no water jacket.....ect even though it would be great to run high comp but there is just no way to do it
08Honda400ex
06-13-2008, 05:19 PM
that sucks!
drew416ex
06-13-2008, 10:21 PM
actually its been done. Four Stroke Tech made a liquid cooled 500ex. They put a water jacket around the cylinder and head, put on a ktm water pump, a radiator and thats about it. IT was a pretty cool looking quad.
08Honda400ex
06-13-2008, 11:20 PM
do you have pics or know where to get pics?
blankenship
06-14-2008, 12:57 AM
actually its been done. Four Stroke Tech made a liquid cooled 500ex. They put a water jacket around the cylinder and head, put on a ktm water pump, a radiator and thats about it. IT was a pretty cool looking quad.

i would really like to see pic artical anyhitng on this quad............do u know how they got water pump on/in the block and how it worked
blankenship
06-14-2008, 01:03 AM
i think this may be the 500ex cool kit u were thinkin of it a oil cooler kit
http://atv.off-road.com/atv/article/articleDetail.jsp?id=191530
drew416ex
06-14-2008, 09:12 AM
No it was really liquid cooled. The article was in 4-wheel atv action years ago. If I can find it I will def. scan the pics and article and send it to you.
drew416ex
06-14-2008, 09:36 AM
Well I cant get my scanner to work, but They did sell the liquid cool kit, but may not anymroe. They wanted $1500 for the kit which included radiator, cylinder mods, hoses, and water pump. Ill keep trying to get it to work.
krt400ex
06-14-2008, 03:00 PM
Originally posted by blankenship
i think this may be the 500ex cool kit u were thinkin of it a oil cooler kit
http://atv.off-road.com/atv/article/articleDetail.jsp?id=191530


no, it was liquid cooled...they had a test of it in atvaction mag a couple yrs ago
06-14-2008, 03:14 PM
thats awesome to hear someone did it. I always thought about that making it liquid cooled but you would need a new head and a bunch of other things. I wish they would still make it or Honda would make it liquid cooled because I love the way the 400EX is right now bore,stroke,everything is great but liquid cooling would be nice.
brian76708
06-14-2008, 03:39 PM
if your so worried about your machine overheating just get a bigger oil resovior and a bigger oil cooler hell you could even get a fan for the oil cooler. why is there a need for liquid cool ?
08Honda400ex
06-14-2008, 03:39 PM
i agree with foxhondarider