How Can I Tell What Secondary Spring I Have?


More than likely the stock red spring with the paint marking worn off.
 
Take a caliper and measure the diameter of the wire and count the number of coils. This data doesn't paste in very well, extra spaces and tabs are automatically removed. But as you read through the data the wire diameter of Brown=5, Red=5.3, Green=5.5, Silver=5.5, Pink=6, and White=6. The Turns (or number of coils) are Brown=5.19, Red=5.53, Green=5.53, Silver=4.86, Pink=5.53, and White=5.53.

YAMAHA SECONDARY SPRINGS

Spring Rate
Torsion Compression Turns Wire Diameter Length Color
(kg/mm/rad)(kg/mm) (mm) (mm)
613 0.063 5.19 5 75 Brown
729 0.74 5.53 5.3 75 Red
848 0.87 5.53 5.5 75 Green
965 1.04 4.86 5.5 75 Silver
1211 1.256 5.53 6 75 Pink
1290 1.372 5.19 6 75 White
 
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Thanks for the info. Looks like I have a red as I am getting 5.34 for wire diameter and I counter 5.5 turns for the spring.
 


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