Hi, Has anyone had this before? On tick over voltage reads 13.7v. Start riding and hit about 3.5k rpm and the voltage starts to drop to between 11.9 - 12.8v occasionally flashes on the display. But if the revs drop below 3.5k it will not rise unless i pull the clutch in for about 3-4 seconds then goes back to normal, until i rev it again then drops. Just to note i fitted a brand new battery just over a month ago. Fault started 3 days ago. Bike starts first time every time. I suspect it could be the voltage rectifier failing, but would like to seek some advise before replacing it. Thanks for any help. Dave.
Possibly be the reg/rec failing, could also be the generator? You can check that with an AC multimeter across the yellow wires going to the reg. At 3.5k revs, you want to see >70V AC. 6k revs approx 100V AC. Measure across the three cables in pairs to check there's a phase not gone down. Bit of a curve ball.....but when was the fuel filter replaced? If this is blocked, it'll cause the pump to draw a greater current and give a lower system V.
Thanks Nelly. Good point regarding the fuel filter not been done for a couple of years, saying that i'm just about to order service parts and fuel filter is on the list. Be doing it myslef as per normal just not sure if i'm brave enough to do the belts.
Serviced the bike and new fuel filter fitted over the Easter break. Seemed to work a treat until last night when I needed to call the breakdown recovery as it would not start. Now the problem seems to be that the fuel pump is not running at all. I suspect that the fuel relay is u/s. But on my way out I did notice that the voltage issue did happen again although only briefly. I plan on ordering a new relay, but wondered if anyone could advise me if I should be check other things also. Cheers, Dave.
Is it displaying any error codes? 1.1 TPS Disconnected 1.2 TPS short circuit to earth 2.1 Pressure Sensor short circuit to power supply 2.2 Pressure Sensor shorted to earth 3.1 Water Temp Sensor shorted to power supply 3.2 Water Temp Sensor shorted to earth 4.1 Air Temp Sensor shorted to power supply 4.2 Air Temp Sensor Shorted to earth 5.1 Battery Hi 5.2 Battery Lo 10.1 Hor. Coil shorted to power supply 10.2 Hor. Coil shorted to earth 11.1 Ver. Coil shorted to power supply 11.2 Ver. Coil shorted to earth 12.1 Inj1 shorted to power supply 12.2 Inj1 shorted to earth 13.1 Inj2 shorted to power supply 13.2 Inj2 shorted to earth 14.1 Inj3 shorted to to power supply 14.2 Inj3 shorted to earth 15.1 Inj4 shorted to powersupply 15.2 Inj4 shorted to earth 16.0 Pump Relay 17.1 LH Fan shorted to power supply 17.2 LH Fan shorted to earth 18.1 RH Fan shorted to power supply 18.2 RH Fan shorted to earth 19.1 Starter Solenoid shorted to power supply 19.2 Starter Solenoid shorted to earth 30.0 ROM/Eprom error 34.0 Signal Panel Sensor 36.0 Speed sensor 37.0 Immobiliser (transponder) 37.1 Immobiliser (antenna) 37.2 Immobiliser (instrument panel serial driver) 37.3 Immobiliser (serial cable disconnected) 37.4 Immobiliser (ccm serial drive) 37.5 Immobiliser (key not recognised) 37.6 Can Line error -------
The management light is on, but at 11pm last night getting home I could not be arsed to look, plus the mood I was in would not have been the best combination tbh. I shall hopefully check tonight.
Of course I shall check these as Nelly suggested. On another note if i can't get it to run is there any advantage/point in checking the resistance across the generator windings? I would imagine that they would be equal across all points. Not removing that fact that they could fail when under loading ect.
Ok, replaced fuel relay and tried to start. Now the relay is chattering like mad and the bike will not start. All I get is a click and stop, the engine does not turn over. Fault codes: 10.1 37.3 38.0?? Charged the battery and reads 14.1v. When I try to turn it over the volts drop down to 8.8v and engine light comes on. My next thought is the starter solenoid. I have been unable to test what Nelly suggested as I can't start the bloody thing. Cheers, Dave.
