Lumor_uk Posted May 11, 2015 Posted May 11, 2015 Battery down to 8v, 6v with ignition on. Had to push start, whilst running i couldn't use indicators or brakes as the whole bike ran badly. RPM display all over the place. Charged it up and got it running to show 15.5v - 16.5v at ildle. 17.5v at 7,000RPM.Have managed to start it a few times since. Battery is 3 years old. Quote
Fozzie Posted May 11, 2015 Posted May 11, 2015 Hmmm, the one in my care has a battery well in excess of this age and is fine, so I'm hesitant to say that.It sounds possible that you have a short or a bad earth somewhere, which is pulling a big amount of current from the battery and causing the voltage to nose dive.Get the manual out and check the earths, as the connectors on this bike do corrode quite easily. Quote
Lumor_uk Posted May 11, 2015 Author Posted May 11, 2015 hum I recently fitted an after market horn that got extremely wet and stopped working for a period. it's now dried out but rust is seeping out from the plastic cover. I'm guessing this is shorting? is there an easy test?I checked voltage earth on it, matches elsewhere on bike. Quote
Fozzie Posted May 11, 2015 Posted May 11, 2015 Usually when you change something electrically and it plays up, something is wrong with the component fitted.Change back to the old horn and see what happens.It's odd a fuse hasn't blown though, it sounds like something is earthing somewhere, as a short circuit should blow a fuse. Quote
Stu Posted May 11, 2015 Posted May 11, 2015 Charged it up and got it running to show 15.5v - 16.5v at ildle. 17.5v at 7,000RPM. this suggests that your reg/rec has gone tits up and is over charging which in turn could have killed your battery Quote
Lumor_uk Posted May 11, 2015 Author Posted May 11, 2015 that's what I thought. but a blog said Honda regs never break. will try swapping the horn back first as I've still got that. Quote
Stu Posted May 11, 2015 Posted May 11, 2015 but a blog said Honda regs never break. really???? think again its always reg/recs that go tits up on honda's Quote
eastanglianbiker Posted May 11, 2015 Posted May 11, 2015 Got to agree with Stu reported voltages are far to high right across the range Quote
Lumor_uk Posted May 11, 2015 Author Posted May 11, 2015 (edited) should the regulator at least be Luke warm after a 15 minute ride? guess I'll go ahead and order a cleaner looking version. mine is all alloy oxidised up.£135 brand new, ouch.I'm actually wondering if my multimeter has lost its calibration. it's showing 16v on the battery after 2.5hrs without being ridden. showing 13.5v on an alkaline 9v battery? Edited May 11, 2015 by Lumor_uk Quote
Stu Posted May 11, 2015 Posted May 11, 2015 reg/recs do get warm after riding how warm is too warm is any ones guess really Quote
Stu Posted May 11, 2015 Posted May 11, 2015 hmmmm I would try a new multimeter first they are cheaper Quote
Fozzie Posted May 12, 2015 Posted May 12, 2015 Try a different multimeter as it sounded a bit weird to begin with, either that or something is crashing the voltage of the battery when nothings connected, which would be odd to happen so fast.I would have thought 13-15v wouldn't be harmful on a 12v battery, as many solar chargers put out 17v, so I'm on the fence with that one. Multimeter and horn first, then see what happens.A reg/rec always gets quite warm after use, especially the honda ones, which on bikes like the CBR600F and Blackbird are infamous for popping. I can check the one I look after this weekend, see what readings I get if you don't get anything. Quote
Lumor_uk Posted May 12, 2015 Author Posted May 12, 2015 borrowed bro in laws but was AC only, borrowing his DC one tonight. Quote
Lumor_uk Posted May 12, 2015 Author Posted May 12, 2015 okay got an expensive multimeter, 14.35-14.5v through out the throttle range. going to point my finger at the cheap alarm deep discharging the battery. battery has had enough after 2 years?replace battery, get trickle charger when leaving bike for more than a couple of days? Quote
Stu Posted May 12, 2015 Posted May 12, 2015 That voltage is more like it So you have an alarm and the battery has drained a number of times already? If so then I recon that is your problem Keeping it on a charger all the time is a good idea IMO but ensure its a maintenance one Quote
Lumor_uk Posted May 12, 2015 Author Posted May 12, 2015 when I've not used bike over winter when icy for a couple of weeks at a time, and another instance few months ago bike has struggled to start. usually charging battery fixed it. but not any more. Quote
Stu Posted May 12, 2015 Posted May 12, 2015 sounds to me like your battery is just screwed and no real "problem" replace battery remove the alarm or keep it on charge when parked up even if you plan on using it the next day Quote
Fozzie Posted May 13, 2015 Posted May 13, 2015 Voltage ranges are well within the normal range there so at least that is solved.If it has been struggling, just remove the alarm and change the battery.I'm surprised you have an alarm on the CBF rather than a huge lock The only people interested in nicking it are usually chavs so an alarm is a bit OTT anyway! Quote
Lumor_uk Posted May 13, 2015 Author Posted May 13, 2015 the alarm was £10, more for convenience. plus I would love the chance to beat to a pulp anyone that tried. There was three motorbikes stolen from a garage in my town, it's just a cabinet lock on my garage. Have a house alarm too, just paranoid Quote
Fozzie Posted May 13, 2015 Posted May 13, 2015 Get an alarmed disc lock and save yourself the hassle Quote
Joeman Posted May 13, 2015 Posted May 13, 2015 Go onto eBay and order a pair or Enfield garage locks. Quote
Lumor_uk Posted May 13, 2015 Author Posted May 13, 2015 Get an alarmed disc lock and save yourself the hassle tried that before, came a cropper Quote
Fozzie Posted May 13, 2015 Posted May 13, 2015 Big chain through the frame, around a solid object, held by an alarmed disc lock or padlock? Quote
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