2006 Honda TRX680 Rincon Factory Service Manual, Page 161Get this manual
FUEL SYSTEM (PGM-FI) DISASSEMBLY
The throttle body is factory presetDo not disassemble in way other than shown in this manual Do not snap the throttle valve from full open to full close after the throttle cable has been removedIt may cause incorrect idle operation Do not damage the throttle bodyIt may cause incorrect throttle valve operation Do not loosen or tighten the white painted bolts, nuts and screws of the throttle body Always clean the throttle body before disassembly to prevent dirt and debris from entering the passages Do not remove the sensor unit unless it is replacedFor IACV replacement (page 6-56)If necessary, remove the screws and MAPTP sensor unit from the throttle bodySENSOR UNIT SCREWS