Hi all im in need of a bit of help.I have a st170 which has spun number 4 big end bearing due to lack of servicing/oil starvation.The bearing journal spec is between 46.89mm-46.91mm for standard size which 1,2,3 are all in spec and i have replaced the bearings with standard size.As for number 4 the bearing journal measures 46.35mm so i need oversize bearings but which size .25,.50,or .75 as i cant find any more info for this engine for oversize bearings and just want to repair it to sell so dont want to go down the regrind route or remove the crank for any reason.The bearing clearance is 0.016mm-0.070mm if anyone could shed a little light that would be great many thanks.