Torque specs for cams?

[TheCafeKid]

outa curiousity, what did ya pay for it on fleabay? Im lookin for a stator cover gasket, and a valve gasket (Z1 has my valve but they dont carry the stator apparently)

[cloudbreakmd]

Oh, no problem bud:

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&ih=005&sspagename=STRK%3AMEWN%3AIT&viewitem=&item=150191346228&rd=1

[TheCafeKid]

Not bad at all... I am hoping to find a lone stator gasket, as i really dont want to buy a WHOLE set at the moment. Mines for the 8v motor, so if you happen on one, give a shout!

[cloudbreakmd]

Will do. :-D

[Jd Powell]

Sh!t thats a pricey gasket. I got a pack of 5 vesrah valvecover gaskets at the local performance bike shop for 15 bucks. As for torque spec's, on my '80 GS1000G headbolts are 27 ft/lbs valve cover 6.5 ft/lbs.

[TheCafeKid]

Yeah.. Unfortunately for me, no one round these parts (or at least within even senseable driving distance) stocks much in the way of parts for my oldie but goodie. Everything ive called for would have to be ordered anyway, and of course they all wanted to charge me near double for alot of it.

[49er]

As dardoonk and Mark have said, you should be replacing those cam cap bolts with grade 9's. Nines are overkill really for strength, as you will normally strip the thread out before they break, if they are over torqued/tightened. But that's a good safety feature. Make sure that the length is correct as well. Be sure to blow the threaded holes out with compressed air to remove any oil as well. If you don't remove excess oil, it's possible to get a hydraulic situation causing you to break bolts as well!
It is common to break these bolts when trying to remove them after years of operation. They seize in the threaded area, due to electro-chemical reaction (electrolysis). Be sure to add a light coating of anti-seize (thread lube) before torqueing up the new bolts. 6ft/lbs is the correct figure.

I remember reading on the GSR a while back about a member finding two broken cap bolts on separate caps. He had been hammering his engine on a regular basis and was surprised that the thing hadn't destroyed itself under the stress of high revs. It just confirms how over designed these engines really are!

[Guest]

I've pulled all the threads out with the bolt before. Thank god for heli-coil. I've got at least half of mine done.
New head on the way though. 1mm oversized intake valves and clean as a whistle. \\/

[49er]

I've pulled all the threads out with the bolt before. Thank god for heli-coil. I've got at least half of mine done.
New head on the way though. 1mm oversized intake valves and clean as a whistle. \\/

Bill, I had only one shagged thread on my 850 at the last rebuild. I was able to buy another longer grade 9 bolt to pick up some undamaged thread deeper down that hole.
Imm oversized intake valves? The quest for more power continues!! Pops went Imm bigger inlets with smaller stem diameters as well!
Happy New Year.

[cloudbreakmd]

Man those bolts are expensive...

Just ordered $130.00 worth of factory hardware. New cam cover bolts, cam hold down bolts, etc, etc. Jeez. Oh well, time to give the bike a new lease on life.

[Jd Powell]

Man those bolts are expensive...

Just ordered $130.00 worth of factory hardware. New cam cover bolts, cam hold down bolts, etc, etc. Jeez. Oh well, time to give the bike a new lease on life.

A good argument for torque wrenches folks. I've pulled a lot of cams from old bikes and been into my current bikes topend more than once. I will stand by the fact that even a superior mechanic is less reliable than a cheap-a$$ torque wrench. There are many instances you will come across where over or under torquing fasteners becomes critical.

[Guest]

Man those bolts are expensive...

Just ordered $130.00 worth of factory hardware. New cam cover bolts, cam hold down bolts, etc, etc. Jeez. Oh well, time to give the bike a new lease on life.

Dude! I have all those bolts. I would of even sent them "FAST" mail. You chose the cheap creep mail for the manual. :?

[cloudbreakmd]

Dammit... Thank you anyway Chef. I am eyeing the toilet bowl right now to go drown myself in now

[cloudbreakmd]

A good argument for torque wrenches folks. I've pulled a lot of cams from old bikes and been into my current bikes topend more than once. I will stand by the fact that even a superior mechanic is less reliable than a cheap-a$$ torque wrench. There are many instances you will come across where over or under torquing fasteners becomes critical.

Actually believe it or not these bolts were breaking on the way in with just two or 3 turns on them as soon as the first thread caught. I can't figure it out. They weren't even flush yet.

[49er]

Actually believe it or not these bolts were breaking on the way in with just two or 3 turns on them as soon as the first thread caught. I can't figure it out. They weren't even flush yet.

Sounds like the bolts have an incorrect thread pitch to match the cap holes!
Either that, or you are cross threading them!