Cstass531 28 days ago Location: Illinois, USA
What spring rate should I go with?
I got a 2014 kx 450 used to race local a class I do still jump big jumps at local tracks want to start racing again im 25 135 pounds without gear 5 foot 9 inches tall 30inch inseam not very long legs but long enough not to get the huck a buck in the whoops I've mainly road with stock suspension settings in my big bike days just setting the sag but was on 250fs this 450s another story if you need any more info let me know so I can get my question answered thanks
Top 1000 Contributor 27 days ago Location: Hartsville, SC 29550, USA
Based on your weight and riding style, the stock spring rate should be fine, the 2014 has a stiffer mid-stroke. Installing Race-Tech gold valves can help that. Changing the pressure in the forks may help, recommended is 35 psi in the forks, make sure you check each time you ride. Setting the sag and race sag will also help the attitude of the bike. Try these and see if that helps. Changing the oil volume may be another factor to look at, recommended is 235 cc.
Expert MotoSport Staff 27 days ago Location: Portland, OR, USA
The stock spring rate for the rear shock on your 2014 Kawasaki KX450 would be 5.4 Kg. Based on the information given the best spring rate recommendation would actually be a softer 4.9 Kg spring. Since the stock spring isn't going to be too soft for you, I would say you may be best off sticking with the stock spring and doing some tuning to until it feels good for you.