Remove the filter.
Remove the oil filter feed pipe.

Install two 20 x 1.5 mm nuts (A) onto the new oil filter feed pipe, and hold one nut with a wrench, then tighten the other nut.

Apply new engine oil to the oil filter feed pipe threads, then torque the oil filter feed pipe to 39 NВ·m (4.0 kgfВ·m, 29 lbfВ·ft), then remove the nuts from the oil filter feed pipe.
Install the oil filter.
Regulator Valve Body Disassembly, Inspection, and Reassembly (A/T)
Clean all parts thoroughly in solvent, and dry them with compressed air.
Blow out all passages except the air check valve filter.
Inspect the regulator valve body for scoring and ...
Fuel Tank Replacement
Drain the fuel tank until it is less than half full.
Reinstall the fuel tank unit without connecting the fuel tank unit 4P
connector and the quick-connect fitting (feed l ...
Reassembly
Install the upper spring seat (A) to the upper spring seat clip (B).
NOTE: Make sure to securely set the upper spring seat to the hook (C) on
the spring seat clip.
...