>From: "hcbowman@gmail.com" hcbowman.TakeThisOut@gmail.com
>Opinions, please: should I put loc-tight on the threads holding the engine
sprocket nut?
Blue Loctite won't hurt anything. It won't help much, but it won't do any
damage...
DO NOT USE RED LOCTITE ON THE COUNTERSHAFT SPROCKET NUT.
Red Loctite will have to be burned off with a Bernzomatic torch, and you may
not get it all off. When you try to loosen the nut, it may feel like it's
cross-threading, and you might actually damage the countershaft's threads,
necessitating an engine teardown to replace it...
>Is it sufficient to torque to the recommended point?
Torque the nut to the specified torque, and it will still loosen up from the
whipping action of the chain as you accelerate and decelerate...
The basic chain tensioning system on a motorcycle is a flawed design. The
countershaft and the swing arm pivot bolts are a few inches apart and that
causes the chain to get tight and loose as the suspension moves up and down...
If all motorcycle chassis designers would just insist that the swingarm pivot
and countershaft have the same centers, the chain wouldn't whip around with
suspension motion. Only a few motorcycles have ever been built this way,
though...
The engine sprocket nut on EVERY motorcycle I have ever owned has eventually
loosened up and started fretting back and forth on the countershaft because of
chain whipping...
Those sprocket safety washers that hold the nut are made of a soft steel so
they can be bent. Anything so soft will fret from contact with the nut as the
chain whips the sprocket back and forth and the safety washer will wear out,
especially inside, where you can't see what is happening to those steel "teeth"
in the center, and the nut will loosen up...
And, some sprocket nuts are made of very soft metal, and the fretting will
eventually wear out the internal threads in the nut, which is by far more
convenient than having the threads on the countershaft wear out...
The soft metal nut on my GSXR-750 fretted itself to death, walking around on
the end of the countershaft. The only thing keeping the sprocket on was the
small 6mm safety bolt and washer...
I replaced the nut and I check it several times a year to make sure it's still
tight. I have no faith whatever in the blue Loctite I used to install the
nut...
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