I got 60,000 km. on my downtown, and it seems to run better year after year, going on three years now, with the mod. on the variator the rpm. is lower at 65 to 70 mph 6,000 rpm. down to 5,400 rpm. not pushing it, next Ill try the 21/12 14 gram sliders see if changes anything, original sliders are 20/12 14 gram, original rollers are 20/12/ 15 1/2 grams,. the meter you sold me says every thing is normal,