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Discussion Starter · #1 ·
I have a 00 R1. Had to buy a battery.. Need some help..checking the charging system. Volts reads 12.9 with key off.. drops to 12.3 when starting then jumps to 14.4-14.5 volts @ idle.. and 15.0 Volts @ 5K RPM.. Is this normal. And Does leaving a trickle charge on all the time ruin the battery.
 

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15 is too high. Engine running it should be at no more than 14 volts but it might be slightly higher and still be ok. If you decide to replace the rectifier you can upgrade it to one from a newer R1. Theres lots of info on the froum about it.
 
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