Trying to do better for my bike on the cheap so scanning for used shocks in the 350 to 450 cc range. Seems to tons of late model shocks coming off ATVs. Is that just a function of how popular they are OR they are more prone to engine blow ups or wrecking? Maybe someone can help me out here. Who has a rear shock with full adjustment they think is great stuff. My stock shock is 17 1/8 eye to eye. Know of one reasonably close in length that would apt to give a 200 lb man a pleasant ride?