I'm not sure if re-valving is necessary for an old fat fart like me. I do know the rear spring is a bit soft for this lazy seat rider. Stock is 5.5 and the recommended spring for my weight is 5.8. I weigh 230. Question: The front seems plenty stiff being USD and all. I'm not getting enough bite up front and cornering is some what an issue (again I'm a lazy seat rider), so I was thinking of going with a heavier spring on the rear only (do nothing to the front). Will this affect the bike behavior?