High Volume Oil Pump Installation Guide

Introduction

Installing a high volume oil pump is a crucial enhancement for your engine, as it significantly increases the oil flow to the top end. The optimal time for this installation is during the bore kit setup, which can save considerable time. Note that a 2mm drill bit is essential for this procedure. The following instructions presume the top end has already been disassembled.

Instructions

1. Drain the Engine Oil
   Ensure the engine oil is completely drained if not done already.

2. Remove the Right Side Engine Cover
   Detach the cover to access the internal components.

3. Disassemble the Clutch Linkage
   Utilize a clutch nut tool to remove the clutch nut and disassemble the clutch assembly, allowing access to the oil pump.

4. Loosen Oil Pump Screws
   Carefully use an impact driver to loosen the screws securing the oil pump.

   

5. Remove the Old Oil Pump
   Extract the existing oil pump to prepare for drilling the oil passage.

   

6. Access the Oil Passage
   Either remove the lower left engine stud or employ a drill bit extension to reach the oil passage.

7. Enlarge the Oil Passage
   With a 2mm drill bit, cautiously enlarge the oil passage. Avoid drilling too deeply into the engine; only the hole needs enlargement.

   

8. Clean the Drilled Area
   Use compressed air and a rag to ensure all metal shavings are thoroughly removed.

9. Install the New Oil Pump and Gasket
   Align the notch on the oil pump with the corresponding notch on the engine case and secure it in place.

   

10. Verify Oil Pump Functionality
    Rotate the sprocket to confirm the oil pump is operational.

11. Reassemble the Clutch Assembly
    Reinstall the clutch components securely.

12. Reattach the Right Side Engine Cover
    Secure the engine cover back in place to complete the installation.