Governor gear colors

There are 2 sets of gears on it one is at the top the lower set runs the speedo. I have the correct speedo gear I just want to know if the upper portions are different?
 
those are the drive gears and affect the governer speed
, to make small changes for the speedometer correction you need to change the driven gear thats in the end of the speedometer bullet
 
I do have the new one for 28" tall tires. The one in the bullet has a metal shaft the replacement is plastic. That should be ok?
 
Thanks Dave. I appreciate that. One more question. The spring on the governor should effect the shift? heavy spring late shift (6000) lighter spring early shift (5600) the numbers are a guess but you get what I mean. Is that correct?
 
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