Measure every single bearing/bushing bore with micrometers or bore gauges for correct sizing.

- Inspect cases for damage, warpage, imperfections and mismatched halves.

- Medium grit glass bead blast aluminum and finish blast with an ultra fine media for the best surface finish possible.

- Fine bead blast internal parts but all bearing/bushing/shaft surfaces are masked so as not to harm their finely finished machined operating surfaces.

- Chamfer/radius all bearing/bushing edges for safe installation.

- Ultrasonic clean ever single part.

- Re-tap every threaded hole.

- Re-ultrasonic clean.

- Hand wash in sink with hot soapy water and rinse.

- Re-hand wash with hot soapy water and pressure water blast.

- Measure each case bore and mating component to ensure proper interference fit into cases.

- Heat cases up uniformly in a dedicated commercial oven so as to evenly heat parts and reduce any chances of distortion. We do not use a flame torch.

- Ensure drive side oil hole lines up with drive housing. If not, alter.

- Fit parts into their cases with appropriate sealant if applicable (push rod guides).

- Jig cases on our dedicated fixtures for bushing/bearing/ shaft installation with our precision arbor press. While our extensive jigs add some time to the job it ensures every thing is in proper alignment which does not broach, damage or crack any of the cases. Fitting items in includes Drive housing, pinion housing, cam bushings, cam follower pivot shaft and bushing, push rod guides, cylinder base studs, magneto hole plug. In cam cover fit the following, cam bushings, cam follower pivot shaft bushings.

- Seal coat inside of cases (optional). These are usually done to early cases due to their poor quality/porous aluminum.

- Measure each shaft, bushing and every roller. This ensures perfection for sizing and eliminates any chance for possible errors.

- Sunnen hone each bushing to size with the correct surface finish.

- We prefer to set the drive side bearings up with a seal so as to eliminate oil from flowing to and from the engine to the primary and transmission.

- Bead blast metal parts that need to be cadmium plated. Mask machined and bearing surfaces.

- Cadmium plate necessary parts.