[Skygazer]

I have a brand-new CF400 and the owner's manual says there is a break-in period before the machine can be used normally without voiding the warranty.
It says to operate below half throttle for 10 hours then below 3/4 throttle for another 10 hours, then do an oil change.
It also says I can't tow or carry loads during the break-in period.

Being a goody-2-shoes I wanted to set the throttle limiter at a point where it couldn't void the warrantee.
It comes from the factory set at maximum, the manual says.
It is a phillips machine screw on the right handlebar with an 8mm lock nut.
The setting is supposed to be the distance under the head, according to the illustration in the book.
Mine came set to 0.722" with a paint mark to show if it moved (or was moved).
So I thought 0.361" would be half throttle.
I unloaded the 400 by gravity from a tilt trailer backed up a slight hill, maybe 5 or 10 degrees of slope.
I set the "peg", as we used to call such things, at 0.361", started it, put it in reverse, and gave it what it had.
It didn't move.
I thought the peg is not a simple half thing and loosed it another 4 threads.
I had ridden the 400 in small circles in my back yard at home so I knew it could go both forward and backward slowly. at least.
The 4 threads gave it enough power to back up and operate like it should.
I ran it about a half hour, hit 10 mph downhill and almost that going up when it warmed up.
Later I thought the throttle cable is likely connected to a butterfly in the throttle body.
In that case with full throttle turning the butterfly 90 degrees, half the distance was probably 45 degrees.
When the butterfly disc turns it forms an ellipse that blocks the air coming in.
The area blocked is proportional to the cosine of the throttle angle.
45 degrees blocks 0.707 of the area so throttle of 45 degrees might be .293 percent of max.
I wanted .50 of max so the cosine of the angle should be 0.50 and the angle would be 60 degrees.
60 degrees is 2/3 of 90 degrees so I expect the best distance under the screw head to be 2/3 * .722 or 0.481"
Today I measured it and had to open it a little more to get 0.481" but a little more throttle will be nice to have.
9-1/2 hours to go before the next setting.

[NMKawierider]

Man you are way-overthinking this...lol. Set it back where it was and use your brain to tell you where 1/2 and 3/4 throttle is. Breaking one in isn't an exact science. Besides, you want to stretch it more and more as it breaks in anyway so push it a little...just not too much.   

[Skygazer]

It could be a long time before it hits even the 10 hour mark.
I may have to do an oil change just because time went by in an outdoor-equivalent temperature xone.
I might enlist a friend or acquaintance to drive the thing up and down my short gravel road for some of the break-in time.
In that case I'd like to let them do what they want with the throttle, and so I would like to have it pegged.
I wrote the original setting distance in the owner's manual.
I'll put it back when it is time.
But I do appreciate your opinion, NMKawierider.
This is the first time I ever had a throttle peg that wasn't caused by improperly installed linkage.
But that's another story for a different day.