Steve's 2009 Yamaha WR250F lowering suspension question

HI. I am from the UK and ride a 2009 WRF250 and use it for leisurely trail riding. I am 5.11 but still struggle to put my foot on the ground without falling over (being 61 years old do'snt help much either!) so I would like to fit a yamalink to lower the bike .I weigh 190lbs and I wonder if you could let me know If I have to change the rear shock spring before I fit the yamalink. Thanks for your help.

Steve, The stock 2009 WR250F spring rate is 4.9 kg/mm. At 190 pounds BEFORE A YAMALINK you need a 5.4 kg/mm to achieve proper sag. So you need a heavier spring anyway. With a YamaLink you need a 5.6 kg/mm spring to achieve proper sag.