The following details apply to the later (90 onwards) monoshock SRX400 (3VN). I would like to thank Bruce Glithro who was kind enough to supply the following information which was translated from the Japanese language SRX400 manual.
Engine Servicing

Oil Drain

2400cc

Oil Drain + Filter

2500cc

Oil Engine Rebuild

2800cc

Oil Filter Part No

4X7-13440-90 (same as TDM850)

Measure the oil level after taking the bike for a ride, switch off, remove the dip stick, and measure by replacing and not screwing it in.

Air filter Part No

3SX-14451-00

Inlet Valve Clearance (cold)

2 - 4 thou (0.05 - 0.10mm)

Exhaust Valve Clearance (cold)

4.5 - 6.7 thou (0.12 - 0.17mm)


Carburettor
Float height7 - 9mm
Tick over1300rpm
Pilot mixture screw3 turns out

Output
Power33PS at 7000rpm
Torque3.4kg/m at 6000rpm