One of the riders is a fast intermediate at 250 pounds and the other is a fast Expert at 190 pounds. Both have 2010 YZ450F's. Whatever input you can offer is appreciated.
Cheers, Don
Our reply: A 250 pounder is waaaay too heavy for the stock spring. A 6.4 or closest is
recommended. With the YamaLink the 190 pounder may be able to get away with the stock
spring after he resets sag and turns in high speed compression in 1/4 turn
increments. Many 190 pounders also go to a 5.9 or closest spring.
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