well if you want to put the ohlins springs on the shocks there are 2 choice 2.3 kg/mm is the factory sring rate and 2.7kg/mm is a opitional spring rate PN.(PP-8CV-600) i look thease up in pioneer performance catalog 69.95.i am sure maxxperf has them as well.Oh also the factory spring rate is the same for the kayaba sx front shocks 2.3 kg/mm (red spring)sorry about that,so look at the spring and see of they have 2.3 some where on them,if so then then should be fine as the spring rate is the same as the ohlins....the 2.7kg/mm ohlin springs can only be used on the front shocks