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View Full Version : Head torque Spec's



68Firebird
03-14-2010, 06:27 PM
I am working on a friend of mines 400ex and was wondering what the Torque spec's are I have the gas tank out and was going to re-torque the head since it was just rebuilt and bored to 450CC's. It had the usuall leak at the front of the engine and I seen on a other thread how to fix it. I want to thank you all for such great info!!

3400ben
03-14-2010, 07:32 PM
cylinder bolts (33 ft-lbs)
cylinder head nuts (33 ft-lbs)

jdog75
03-14-2010, 07:40 PM
well thats funny bc i looked at this and saw the tork for the cylinder and i thought you were wrong so i checked it in my manual and it turns out you were right and i have my cylinder torgued ten pounds over

68Firebird
03-14-2010, 08:10 PM
Hey guy's, Thanks a bunch!! I love to work on this quad for my friend. I was on it the other day and doing about 40 in fourth gear and hit the throdle and it started going sideways!! I really enjoy playing with it!!