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Old 08-15-2009, 10:07 AM   #1
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Default duo 2 timing

does anyone know what the timing marks on the duo 2 really stand for?

Many websites quote the -40 degrees to +40 degrees, but that must be wrong. That would be 80 degrees of total timing adjustment, and the motor end piece does NOT rotate through nearly 1/4 rotation of the back of the motor! It's actually a bit less than 1/8, not a full 1/4 turn. 1/4...

My duo 2 came with the timing set in the very middle of the range... if I were to believe the paper that came with the motor, then that is "0" degrees timing... but I'm not sure I believe it.

Here's how i see it:

(1) the timing hashes on the motor MUST be for 5 degree increments.

(2) the center position (with the slightly larger hash) COULD be for 0 degrees, which would give a timing range of -20 to +20; OR the center position could be some standard advance (say, 20 degrees) which would give a timing range of 0 to +40.

thoughts?

anybody in the know?
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Old 08-15-2009, 10:26 AM   #2
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Originally Posted by slashdriver View Post
does anyone know what the timing marks on the duo 2 really stand for?

Many websites quote the -40 degrees to +40 degrees, but that must be wrong. That would be 80 degrees of total timing adjustment, and the motor end piece does NOT rotate through nearly 1/4 rotation of the back of the motor! It's actually a bit less than 1/8, not a full 1/4 turn. 1/4...

My duo 2 came with the timing set in the very middle of the range... if I were to believe the paper that came with the motor, then that is "0" degrees timing... but I'm not sure I believe it.

Here's how i see it:

(1) the timing hashes on the motor MUST be for 5 degree increments.

(2) the center position (with the slightly larger hash) COULD be for 0 degrees, which would give a timing range of -20 to +20; OR the center position could be some standard advance (say, 20 degrees) which would give a timing range of 0 to +40.

thoughts?

anybody in the know?

It's -20 & +20. Each mark is 5*. The end bell hash centered on the center can hash is 0 (though some say it already has +10* built in) In any case....
The area between hashes is 2.5* the next hash is 5*, inbetween is 7.5* etc etc.

Do yourself a favor and set the timing at 0* and gear it from there. Your motor will be happy, your bank account will be happy and thus, you will be happy.
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