620 multistrada motors don't have bearings for the swingarm in the back of the cases so won't work in Monsters/SSs. Or you could buy my spare cases and swap all the internals over! 6speed boxes and ATPC "slipper" clutches can be fitted to early 5 speed motors HTH, Paul Paul 15th year in DD #68 and getting slower by the year 1199, SS800 & 620SSie DD racer |