Author Topic: 400 head-bolt torque specs? (Read 1563 times)

Uncle Ernie · « **on:** April 17, 2006, 03:11:11 PM »

Found I have a couple of loose ones. The manual I have says 15 ft lb +/-. Seems a little anemic to me- is that right?

malcolmgb · « **Reply #1 on:** April 17, 2006, 03:22:59 PM »

my copy says, lightly oiled threads 14.5 lbs/ft

Uncle Ernie · « **Reply #2 on:** April 17, 2006, 09:06:42 PM »

Thanks Malcolm.
Are you a fellow GB500 person, or does GB stand for something else?

oldbiker · « **Reply #3 on:** April 18, 2006, 12:21:39 AM »

Hi Ernie, Malcolm is right at 14.5 lbs-ft for the 8mm bolts and for any 6mm bolts it is 5 - 8 lbs-ft. best wishes, John.

malcolmgb · « **Reply #4 on:** April 18, 2006, 08:41:40 AM »

Are you a fellow GB500 person, or does GB stand for something else?

yes I'm from GB but they are also my initials, I'm in the Midlands (Burton on Trent)

ttr400 · « **Reply #5 on:** April 18, 2006, 01:38:05 PM »

On my 400f motors I torque the head to 18 ft.lb, this is what Kaz Yoshima recomended in his day.

Kevin.

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