250-500cc Checking crank when topend is off

Hey guys, Replacing topend on the wr300 this weekend and it looks good. No scoring, Piston even looked almost new with exception of a little carbon build up. I haven't ordered a new piston as I was going to take that in and have my shop check for tolerances to be sure and order the correct piston. My mechanic friend says I should also bring in bike to have them check crank out too. Seems like quite the hassle. Do you guys do this or just put in new piston and go? Is there an easy way for me to check it? Miles are around 3000 ish. I originally thought it was double that but was reading odo wrong. Replacing piston because Compression went to to about 30 psi. Like I said though the piston and cylinder looked almost new.

make sure no up & down movement in rod, a little from side to side ok I believe. can also check for movement/play at flywheel/stator. getting cylinder mic'd probably not a bad idea but personally I wouldn't bother until next top end just check nikasil for tiny cracks/missing plating. I ran my 300 for another 100+ hours with a small crack in nikasil-no dramas. tough old donks these things. im sure itl be fine mate, just bung a new slug in it & go hard! disclaimer-I am no mechanic, disregard above statements in full

Check for up and down play, side to side is normal and required to operate. Replace the piston if the plating looks good and go ride !

Not just up and down check the motion throughout the cranks rotation
So one at tdc move the crank 90deg check up n down too if possible
Ive seen an oval crank pin that was good in one rotation an
Shot at midway point.
Should be fine tho no play is what you look for

Yeah I was reading my voyager odo wrong. Figured that couldn't be right