2006 Honda TRX680 Rincon Factory Service Manual, Page 149Get this manual
FUEL SYSTEM (PGM-FI) QUICK CONNECT FITTING INSTALLATION Always replace the retainer of the quick connect fitting and joint rubber when the fuel feed hose is disconnected If any retainer needs replacing, use the same manufacture's retainer as the ones being removed (The several manufactures feature different retainer specifications) If any damage or cut-out on the rubber cap, replace it with new one Do not bent or twist the fuel feed hose1Insert new retainer into the connectorRETAINER
CONNECTOR 2Set new joint rubber to the fuel pipe as shown3Align the quick connect fitting with the pipe and align the new retainer locking pawls with the connector grooves in the rubber lock pieceThen press the quick connect fitting onto the pipe until both retainer pawls lock with "CLICK"If it is hard to connect, put small amount of engine oil on the pipe endCONNECTOR