Hi, ive just read this,ive had my honda tlr 250 from new in 1985 and used to ride it in the expert class.I now ride it in twinshock trials and o/40 in modern trials.I use turbo diesel 10/40 oil,std clutch plates,do get very little judder but nothing you notions in a section (still got orginal springs and metal plate) and hardly ever have to adjust it.as for the growling an old boy told me about 8 years ago to fit a washer behind the clutch basket to take up the free play but not tight leave about 2thou play and ive never had no more growling .Hope this help someone?I ride this bike hard and often.