Cam Cap Torque Conversions

Hey gang - Has anyone got the torque settings for 650 camshafts. My torque wrench is in ft. lbs and gigakilojewelsnewtons or some crazy setting. The factory mechanic's manual calls for 75 inch/lbs, what is that coverted to foot lbs?

Cheers-Colin Firth-Ontario Canada

im pretty sure 12 inch pounds = 1 foot pound. so going by that, 6.25 foot pounds = 75 inch pounds
might want to get that double checked though, i could be way off

Colin, to convert to ft/lbs from in/lbs, just divide by 12. Here is a handy conversion tool, just save it (then extract it, as it is a zip file). I keep one on the desktop of all my systems.

Converter

Thanks guys. It was too late for my brain to function in a logical manner. The answer was obvious:)

Dave, my cams came in today as well as the stuff from Z1. If you are out and about tomorrow give me a shout and I'll get you the allen head bolts.

Cheers-Colin Firth

I would not try to use a foot lbs wrench when it calls for inch lbs, they are not that accurate at the bottom of the setting scale, at least mine are not

A lot of the fasteners on a KZ require torque in inch pounds. I have access to a 3/8" drive torque wrench calibrated in inch pounds and my own 1/2" drive torque wrench calibrated in foot pounds.

A person really needs access to both sizes before doing serious work on these bikes.

BSKZ650 wrote:

I would not try to use a foot lbs wrench when it calls for inch lbs, they are not that accurate at the bottom of the setting scale, at least mine are not

Agreed!

I found this out the hard way (read: expensive) when I used a foot-pound torque wrench to tighten down in inch-pounds the ($90!) outlet valve onto the piston rod of a paint sprayer at work - SNAP! :pinch:
The shop ended up having to "eat" that valve.
It's a good thing I'm responsible for my own parts inventory, as that valve mysteriously disappeared from the inventory list. :whistle: :laugh:

75 inch lbs is a gallon of milk on the end of a 9" wrench.
Make sure the threads are clear over the engagement length.
-Duck

Torque wrenches are generally not accurate at the top and bottom 10% of their range.

If you want to be absolutely sure that your torque wrench is accurate, or you want to calibrate it for a specific torque setting, it's really simple to do.

6.25 foot pounds (or 75 inch pounds) is 6.25 pounds of force applied 1 foot from the center of the bolt. So clamp the square drive end of the torque wrench in a vise with the handle parallel to the ground, hang a milk jug containing water that has a total weight of 6.25 lbs on the handle one foot from the center of the square drive, and check the setting on the torque wrench. If it is a beam type just look at the pointer, if it is a click type, just set it so it clicks.

If you don't have a vise, then just put the torque wrench on a lugnut on one of the wheels on you car, anything that will not move when you apply that torque to it will work.

Post edited by: steell, at: 2007/05/05 10:31

i could be wrong but last i heard a gallon of water was closer to 8 lbs than 6;)

Duck wrote:

75 inch lbs is a gallon of milk on the end of a 9" wrench.
Make sure the threads are clear over the engagement length.
-Duck

I'd love to see you work on your bike Duck!:woohoo:

wireman wrote:

i could be wrong but last i heard a gallon of water was closer to 8 lbs than 6;)

Isn't Google wonderful???

Weight of One Gallon (U.S.) of Water, Gasoline, and Ethanol

* 1 gallon of water equals 8.33 lbs.
* 1 gallon of gasoline equals 5.8 to 6.5 lbs.
* 1 gallon of ethanol equals 6.59 lbs.

One gallon of regular beer equals 7.25 lbs, light beer 6.78 lbs.

I put that in just to see if anyone noticed:)


Source: U.S. Dept. of Energy. Fuel From Farms: a Guide to Small Scale Ethanol Production. May 1980. Page D-3.

Cheers - Colin Firth-Ontario Canada