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i was just wondering what the numbers mean on a helix.. I have a d&d 120 80.. what do the different numbers make it do?
and what is stock on a 03 zr 900?
 

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First # is how fast it will shift. If you have a lot of motor and want to load it and work it to get the most acceleration go with a high first #. 60/40 vs. 55/53.

Second # is the back shift. Depending on what rpms you want or want to hold this will dictate what # you will want. Also the lower the number the quicker the shift.

Now before someone chimes in and tells me I'm full of it, this all depends on particular set ups and at which end of the spectrum you are at. Here is a helpful chart you may want to copy.
 

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