| The Factory cranks do have drilled holes on the counterweights.
Start by measuring the Crankshaft end play. If that's in tolerance then proceed to check the rod clearance
Crankshaft End play - Std. 0.05 - 0.18 MM or 0.0020 - 0.0071 in .
Limit 0.30 MM or 0.0118 in
Connecting Rod clearance
Standard its .20 to .35 MM or 0.00790- 0.00138 in.
Max Limit - .40 MM or 0.0157 inch.
Hope that helps.