2006-12-05 04:09:26 · 10 answers · asked by gord k 1 in Cars & Transportation ➔ Motorcycles
most bikes use some type of ac generator, with a permanent magnet rotor and a specially wound stator, to procuce electricity. this ac current is then rectified and regulated to produce dc current for running the bikes electric sysyem, including charging the battery.
some older bikes use a dc generator, most notably the older harleys. your cbr uses the ac generator system.
as the engine runs, the generator begins producing voltage, usually only abouthe same as battery voltage, that is about 12 volts. as the engine revs higher, the rotor spins faster, causinghigher ans higher voltage to be produced. the ac generator usually makes maximum power above about 2000 engine rpm and is controlled by the regulator to a maximum ofabout 14.5 volts.
this change in voltage from12 to 14 volts is what you are seeing as dim to bright lights as you rev the engine. it could be very normal but a few checks to make sure should be performed.
check the battery for clean and tight connections.
if you can check the water level, is it full? if not add distilled water to the "full" line.
is the battery fully charged? check this with a volt meter set to "dc volts'.ishoul be at least 12 volts. if not charge it with a 1 or 2 amp charger for about an hour or longer, and retest. still wont make 12 volts? replace it.
if the battery checks good, the check the ac generator.
start the motorcycle and check the battery voltage at idle. it shoul be at least 12 volts or a bit more.
watch the voltmeter as you rev the engine to about 2500 rpm. the voltmeter shoul read about 14 to 15 volts, maximum. if not the ac generator or regulator may need to be replaced.
hope this helps.
2006-12-05 06:03:11 · answer #1 · answered by Steve 2 · 1⤊ 0⤋
Perfectly normal...the alternator which charges the battery puts out more current as the revs increaseand the regulator limits the amount of charge going into your battery at approximately 14 volts. Its easy to check...just connect a DC voltmeter to the battery and increase the revs gradually.
2006-12-05 04:21:30 · answer #2 · answered by Ray K 1 · 1⤊ 0⤋
Yes its normal to see slight change in intensity of light when you rev. But like the other guy said could be the batterys first signs of imminant death. Check charging circuit to ensue its ending juice to the battery.
2006-12-05 04:14:05 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Yes - it's that way on all bikes, mostly. It's because they are on a generator type of system; as the generator turns faster, the power surges, and the lights and dash will become brighter. Happens on my Ninjas as well.
2006-12-05 05:02:37 · answer #4 · answered by gatesfam@swbell.net 4 · 1⤊ 0⤋
it is possible that they can get slightly brighter when revved but if there is a big difference then it is likely that your regulator/rectifier is faulty its worth checking out any way unfortunately if it is faulty then it can damage your battery and it is advisable to change them both.
2006-12-05 07:09:10 · answer #5 · answered by rev head 2 · 0⤊ 0⤋
Sounds like the battery is on its way out.
2006-12-05 04:25:16 · answer #6 · answered by geoff t 4 · 0⤊ 1⤋
Start saving for a new battery.
2006-12-05 04:11:14 · answer #7 · answered by Anonymous · 0⤊ 1⤋
Have your voltage regulator checked
2006-12-05 04:12:54 · answer #8 · answered by Denise R 2 · 0⤊ 0⤋
Yes, it's totally normal.
2006-12-05 04:11:53 · answer #9 · answered by Goofy Goofer Goof Goof Goof ! 6 · 1⤊ 1⤋
yes normal my yam does it & i have new battery & new reg rectifier on
2006-12-05 05:13:45 · answer #10 · answered by quasar 6 · 0⤊ 0⤋