Yamaha RMAX Engine Build Report

Bearing selection, clearances and final assembly record
Eagle ATV Rental & Guided Tours
Yamaha Service Department

Yamaha RMAX Bearing Calculator

Case stamp order is J3, J2, J1. Crankshaft and balance shaft journal codes are entered in J1, J2, J3 order. You may calculate any one complete section by itself.

Crankshaft main bearings

Balance shaft bearings

Connecting rod bearings

Engine build information

Crankshaft mains

Not calculated.

Balance shaft

Not calculated.

Connecting rods

Not calculated.

Complete order list

No bearing calculations yet.

Measured clearances

Record the actual measurements taken during assembly.

Measurement Manual specification Actual Pass
Crankshaft journal oil clearance J10.021–0.045 mm
Crankshaft journal oil clearance J20.021–0.045 mm
Crankshaft journal oil clearance J30.021–0.045 mm
Balancer shaft bearing clearance J10.017–0.041 mm
Balancer shaft bearing clearance J20.017–0.041 mm
Balancer shaft bearing clearance J30.017–0.041 mm
Connecting rod oil clearance P10.034–0.058 mm
Connecting rod oil clearance P20.034–0.058 mm
Piston-to-cylinder clearance #10.020–0.045 mm
Piston-to-cylinder clearance #20.020–0.045 mm

Engine assembly torque checklist

Check each item after final tightening. Angle-tightened fasteners must follow the service-manual sequence.

Done Fastener Specification Notes / initials
Connecting rod cap bolts1st: 20 N·m (15 lb·ft)
2nd: 180°
Crankcase M10 × 100 bolts (1–6)1st: 24 N·m (18 lb·ft)
2nd: 20 N·m (15 lb·ft)
Crankcase M8 × 90 bolts (7–12)1st: 15 N·m (11 lb·ft)
2nd: 15 N·m (11 lb·ft)
3rd: 90°
Crankcase M6 bolts10 N·m (7.4 lb·ft)
Cylinder head M12 bolts1st: 20 N·m (15 lb·ft)
2nd: 40 N·m (30 lb·ft)
Then one at a time: loosen, 25 N·m (18 lb·ft), then 120°
Cylinder head M6 bolts10 N·m (7.4 lb·ft)
Camshaft cap bolts10 N·m (7.4 lb·ft)
Timing chain tensioner bolt10 N·m (7.4 lb·ft)
Cylinder head cover bolts10 N·m (7.4 lb·ft)
Spark plugs13 N·m (9.6 lb·ft)
AC magneto rotor bolt130 N·m (96 lb·ft)
Primary sheave assembly nut305 N·m (225 lb·ft)
Secondary sheave assembly nut245 N·m (181 lb·ft)
Engine oil drain bolts (crankcase)20 N·m (15 lb·ft)
Oil filter cartridge17 N·m (13 lb·ft)
Use new fasteners, O-rings, gaskets and locking agents wherever the Yamaha procedure marks them as required. This sheet is a quick assembly record and does not replace the tightening sequence, lubrication instructions or angle procedure in the service manual.

Use “Generate build report,” then choose “Save as PDF” in the browser print window to keep a digital service record.

Build notes

Calculation rules used: crank main bearing code = Case C code minus crank journal code. Balance bearing code = Case B code minus balance shaft journal code. Rod bearing code = rod code minus crankpin code. Each journal uses two bearing shells. Part numbers are matched by bearing type and color.

Technician signature
Date completed
Final inspection / quality check
Date