'00 wr400 engine: common problems/issues?
Posted March 03, 2008 - 09:36 AM
I'm planing to tear it down and check it out good before I pop it in, but any advise you guys can offer for things I should specifically check would be much appreciated!
Are there any common issues with it in general I should be aware of?
Posted March 07, 2008 - 09:30 AM
The 400's are fairly bulletproof in stock form. All of my destruction was self inflicted, from mods that I did, like the big bore kit and filing the fingers on the clutch basket, and let's not forget the block heater.
If I had've left the engine alone except for regular maintenance, I probably wouldn't have had a problem. The carb slide is the only thing I can think of to watch for.
Posted March 07, 2008 - 10:01 AM
From what I've read, the 2000 was the most reliable out of a lineup of reliable engines - the 2001 and 2002 426 went to titanium valves that required more maintenance, however, the 2000 still had steel valves.
3rd gear was supposedly the weakest point on a 2000, along with a false neutral between 1st and 2nd that could be fixed with some minor filing modification.
Posted March 07, 2008 - 11:32 AM
Also, what about 3rd gear was/is weak? do the gears break or have teeth shear off or something? Would swapping my gears out of my 99 help the problem?
On a side note, are there any gearing differences between the 99 and 2000 as far as the internals are concerned?
frostbite...I built a set of tires this year with sled studs. All I can say is...WOW!