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Discussion Starter #1
What's the difference between the color of the primary clutch spring? There's red, orange , brite green etc... I know they have something to do with lbs at X amount load, but what exactly does that mean? like more climbing power in the woods, faster in races etc.?

for example this is for the orange one on ebay..

Fine tune your engagement and top RPM as you like
Manufactured from highest quality material
5% tolerance for consistency
18.96 lbs at 2-1/2" Load
87 lbs at 2-1/4" Load
140 lbs at 1-1/4" Load

Orange

and here is for the brite green...

Fine tune your engagement and top RPM as you like
Manufactured from highest quality material
5% tolerance for consistency
17 lbs at 2-1/2" Load
38 lbs at 2-1/4" Load
123 lbs at 1-1/4" Load

Brite Green
 

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I have an orange EPI spring sitting on the shelf if you want to try it. 35 dollars is far too much to pay for that spring.
 

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The start rate of the spring effects engagement and the finish rate effects top rpm as well as RPM throughout the shift range. Along with the weights in the primary. Plus the secondary spring and helix as well as your tires, and which gear your in along with the weight of the machine and cargo and passengers, etc. It all has to work together. To hard to explain it all. on a forum. That's why Aaen wrote a book on it.
 

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