GPz 1100 cam cap bolt torque specs - again.....

Arrgh, was dumb enough to trust my manuals.

Double and triplechecked my Clymer with my FSM and both said to torque the cam cap bolts to 12 ft.lbs/144 in.lbs/16 Nm - you know what happened. :pinch:

Correct spec is 9.4 ft.lbs/114 in.lbs/ 12 Nm, right??

I did use a small 1/4" 5-30 Nm torque wrench btw, the ft.lbs come from the manual.

Oh well, time to break out the thread inserts, what fun motorcycles can be...

Yes...max is 9.4 ft lbs...I usually stop at about 8 ft lbs, to be safe...and I torque using inch lbs also!

I actually dont use a torque wrench on the smaller fasteners,something I learned at a young age snapping off fork leg studs and exhuast studs using a torque wrench! :blush: :dry: :huh: :blink: :sick: :woohoo:

My KZ650 FSM calls for 95-113 Inch lbs. The cam cap bolts on the KZ650 are 6mm. Ed

650ed wrote: My KZ650 FSM calls for 95-113 Inch lbs. The cam cap bolts on the KZ650 are 6mm. Ed

Thats the same numbers as 900/1000 lists in fsm,but again I just hand tighten them without a torque wrench

OnkelB wrote: Arrgh, was dumb enough to trust my manuals.

Double and triplechecked my Clymer with my FSM and both said to torque the cam cap bolts to 12 ft.lbs/144 in.lbs/16 Nm - you know what happened. :pinch:

Correct spec is 9.4 ft.lbs/114 in.lbs/ 12 Nm, right??

I did use a small 1/4" 5-30 Nm torque wrench btw, the ft.lbs come from the manual.

Oh well, time to break out the thread inserts, what fun motorcycles can be...

Which fsm do you have?
Look on page 37

6 mm cam cap bolts on the GPz 1100 too.

Dang, looks like it's a misprint in the FSM and Clymer lifted it from there.

One thread stripped during torqueing, managed to strip two more threads with my mini-ratchet before I even got to the torque wrench, so I guess they weren't too good to begin with.

I'll make corrections in the manuals just in case I have to go in there again.

Thanks guys.


Edit: I have a Clymer in hard copy and KZ 1000/1100 FSM in pdf format (J, K, M and GPz models).

Here's a screenshot of the FSM torque spec table:

Da nada

Looking at it again I realized that 16 Nm (144 in.lbs) compared to 12 Nm (114 in.lbs) is over-torqueing by 33 percent! :blink: :S

Just installed a couple of inserts in a spare head I have (never did it before so I thought a practice run would be appropriate) and torqued a cap down a couple of times to test.

Worked as it should and I got the install depth figured out so I think I'm on top of it now, I'll let you know how it goes - definitely one of those jobs where you don't drink beer until you're finished...

OnkelB wrote: Looking at it again I realized that 16 Nm (144 in.lbs) compared to 12 Nm (114 in.lbs) is over-torqueing by 33 percent! :blink: :S


Worked as it should and I got the install depth figured out so I think I'm on top of it now, I'll let you know how it goes - definitely one of those jobs where you don't drink beer until you're finished...

So that was my mistake :laugh: :laugh: :laugh:

OnkelB wrote: Looking at it again I realized that 16 Nm (144 in.lbs) compared to 12 Nm (114 in.lbs) is over-torqueing by 33 percent! :blink: :S

and the 114 I-P is already pushing it...

Yeah, might back down to 11Nm/some 97-98 in.lbs, that is the spec for my 650 and has worked well so far.

I'm installing some inserts very similar to these , only mine are 8x1.25 on the outside and 6X1.0 on the inside (and I'm doing it with hand tools) - judging from the test install I did they will easily handle the 12Nm/114 in.lbs, but better safe than sorry.

I'm fortunate enough to have access to the inserts at work for next to free, over here a Helicoil starter kit with drill, tap, installation tool, breaker and a small assortment of coils will set you back some $250. :S Of course you can't just buy a 6 mm kit, oh no...