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Old 05-10-2013, 08:30 AM   #1
Silverbird OP
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2005 ktm 400 exc

I am looking at an 05 400 EXC. I've read good things about this bike. Anyone have any wisdom to share?
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Old 05-10-2013, 09:22 AM   #2
LukasM
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Solid bike and engine, discussed in every little detail you could want to know in the 8 years it has been out.

Do a search here (use google with your search term and site:advrider.com) and look through the "RFS" subforum on KTMtalk.
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Old 05-10-2013, 09:46 AM   #3
Rusty Rocket
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Love mine. It is the same bike as the 450/525 with a shorter stroke engine. It revs quicker and is supposed to turn better because of the short stroke. (I don't understand that idea well) The only thing I had trouble with was overheating. It boils easy with stock jetting. I put in JD jet kit and that helped, but not enough. I went to a higher pressure radiator cap and that helped, but still not enough. I was about to add a fan kit when I tried Evans Coolant. It has a 300+ degree boil point. Hasn't over heated in 10 months. (since day 1 on Evans)

http://www.ktm-parts.com/mm5/merchan...g#.UY0i90qSPcw

It's not cheap, but I went through more Engine Ice dollarwise than this in the first year.. one bottle is enough with some to spare. I went back to the lower pressure rad cap to save the water pump seals.

RFS motors are the best KTM 4T engine ever made. I have 8000 + miles on mine and it still runs fantastic.

I weigh 200 without gear on and for the rocks and roots of New England, I have .47 fork springs and an 8.0 rear spring. That solved suspension for me. YMMV..

with 2006 shroud graphics:
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Old 05-14-2013, 06:35 AM   #4
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Thanks for your input, I brought her home yesterday.
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Old 05-14-2013, 09:20 AM   #5
Rusty Rocket
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Quote:
Originally Posted by Silverbird View Post
Thanks for your input, I brought her home yesterday.
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Old 05-14-2013, 10:16 AM   #6
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Originally Posted by Silverbird View Post
Thanks for your input, I brought her home yesterday.

Well done, you will love it.
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Old 05-14-2013, 03:46 PM   #7
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Took my old 2004 400EXC to about 400 hours / 10,000 miles on the original crank, clutch & piston. Very reliable, easy to service, can do the valves without a feeler gauge and there's still excellent aftermarket support.
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Old 05-21-2013, 07:55 AM   #8
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Thanks everyone. Let me know if there is something I just cant live without doing to her (tips/tricks/mods).
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Old 06-03-2013, 12:56 PM   #9
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Well you were right. I boiled her over 4 time first time out. I am starting to do a few mods to help this problem. Any advise on how to drain the coolant? After years of working on Jap bikes it's like learning a new language.
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Old 06-03-2013, 01:03 PM   #10
go2cnavy
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Quote:
Originally Posted by Silverbird View Post
I am looking at an 05 400 EXC. I've read good things about this bike. Anyone have any wisdom to share?
Don't pay more than $1800 for one when you can score a 450 for just a little more.
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Old 06-03-2013, 01:08 PM   #11
clapped_r6
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Quote:
Originally Posted by Silverbird View Post
Well you were right. I boiled her over 4 time first time out. I am starting to do a few mods to help this problem. Any advise on how to drain the coolant?
http://www.advrider.com/forums/showthread.php?t=373580

coolant drain is right above the exhaust pipe? or right around there somewhere.

keep in mind the coolant level is not supposed to be all the way to the top. if you overfill, it will spit up.
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Old 06-03-2013, 01:11 PM   #12
clapped_r6
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Originally Posted by go2cnavy View Post
Don't pay more than $1800 for one when you can score a 450 for just a little more.
did you not see he got the bike more than 3 weeks ago?
and some people actually prefer the 400. i know, hard to believe, right?

thank you for your extremely helpful and timely info!
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Old 06-03-2013, 01:11 PM   #13
OhioPT
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Quote:
Originally Posted by Silverbird View Post
Well you were right. I boiled her over 4 time first time out. I am starting to do a few mods to help this problem. Any advise on how to drain the coolant? After years of working on Jap bikes it's like learning a new language.
What's the jetting (needle type/position, pilot and main jets)? They are setup terribly lean from the factory. Get a radiator fan too. Try Evans or Engine ice if those 2 things don't help. Also, shut the bike off if you are sitting idle for a while- that's a big one ;)
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Old 06-03-2013, 01:43 PM   #14
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Quote:
Originally Posted by Silverbird View Post
Well you were right. I boiled her over 4 time first time out. I am starting to do a few mods to help this problem. Any advise on how to drain the coolant? After years of working on Jap bikes it's like learning a new language.
Coolant plug is the bottom of the rad. You can also remove the thermostat to drain it.

What you need, in order:
JD jet kit
KTM hard parts fan
Engine Ice

This will solve your boiling over problem.
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Old 06-03-2013, 02:40 PM   #15
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Yeah that's the direction I'm headed. I live in a pretty warm climate so I may delete the T-stat and put on some silicone hoses as well.
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