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Discussion Starter · #1 ·
First post on these forums, so I'm not sure if this is the right place to put this thread (couldn't find a thread on this topic through the search feature), but here it is...
A friend of mine has an '05 400EX and I just picked up a '00 400EX. Both have been bored to 440 and both blow head gaskets like it's going out of style. Is this a known problem with 440 kits in 400s? Is there a good fix for it? Would it be better just to rebuild it as a 400?
Thanks in advance. :smile:
 

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Discussion Starter · #4 ·
Thanks guys! Any idea where would be a good place to get them? I'm not really too sure what head bolts I would need to get.
 

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Probably the people who sell the 440 kits would sell them.
 

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Welcome to the forums.
 
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