boreing questions..

[justin1022]

if you bore ur 400ex and put cams i herd you have a tendincy of blowing your ead gasket is that true?

[hornetgod13]

Any bore over a 416cc (87mm) with out the use of heavy duty cylinder studs or over/under torqueing the head nuts will definitely lead to a blown head or base gasket. If you use a torque wrench, maintenance manual, and use HD studs over 87mm you won't have any problems.

[krt400ex]

Originally posted by hornetgod13
Any bore over a 416cc (87mm) with out the use of heavy duty cylinder studs or over/under torqueing the head nuts will definitely lead to a blown head or base gasket. If you use a torque wrench, maintenance manual, and use HD studs over 87mm you won't have any problems.

x2, but to add...if you go to a 426, you are at more of a risk to blow head gaskets, but not like the 440...a 440 will blow them left and right if you dont run HD studs.

[brokenmike]

My 440 has been togeather since 2003 and never blown a head gasket and I dont have heavy duty head studs:)

[REDRIDDER]

I've been running a 426ex now for over a year without any head gasket problems at all, and no head HD studs.

[AZ440ex]

Originally posted by brokenmike
My 440 has been togeather since 2003 and never blown a head gasket and I dont have heavy duty head studs:)

:) +1 for that. Mine is going on 5 years. Just do proper maintenance and use a TQ wrench to assemble.