lawnmowerman 0 Posted October 15, 2019 Share Posted October 15, 2019 hello im not a home for a couple of days does any one have the actual numbers that the manual says the voltage should be on a 1998 honda vfr 800 fi , my honda mechanic told me the voltage should drop while the bike is running , from like 14.2 to like 13.2 at 5000 rpms , i dont believe that i think he just cant figure out the problem. than lawnmower man Quote Link to post Share on other sites
Member Contributer Terry 561 Posted October 16, 2019 Member Contributer Share Posted October 16, 2019 Excerpts from the manual are attached. The voltage should start at whatever the battery is putting out, and then rise up to the regulated voltage as the alternator puts out more and more energy as it spins to higher rpm. If the voltage is dropping back to the battery voltage then that might suggest a failing regulator/rectifier. Quote Link to post Share on other sites
lawnmowerman 0 Posted October 16, 2019 Author Share Posted October 16, 2019 Thank you for this reply. I am a EMT and i work for 60 hours straight, so i could not get home to get my manual. Now do i confront my local power sports dealer with this and tell him that he is wrong and to read the manual ? I don't mean to be a know it all but it should not idle at 14.2 and 13.2 at 5000 RPM. i am angry because i am paying him for his knowledge and expertise. thank you Lawnmower man Quote Link to post Share on other sites
Member Contributer Terry 561 Posted October 16, 2019 Member Contributer Share Posted October 16, 2019 I can tell you with confidence that my two bikes with voltmeters fitted show a lower voltage (the battery voltage) at idle (low 13s) and then hit a steady higher voltage (usually around 14.2V) once the revs rise, and then don't change at all with any higher revs. Are you sure you're getting the right info and that the numbers have not been switched around? 1 Quote Link to post Share on other sites
Member Contributer Grum 782 Posted October 16, 2019 Member Contributer Share Posted October 16, 2019 3 hours ago, lawnmowerman said: Thank you for this reply. I am a EMT and i work for 60 hours straight, so i could not get home to get my manual. Now do i confront my local power sports dealer with this and tell him that he is wrong and to read the manual ? I don't mean to be a know it all but it should not idle at 14.2 and 13.2 at 5000 RPM. i am angry because i am paying him for his knowledge and expertise. thank you Lawnmower man I'd trust Terry's info and experience long before most dealers. Also the service manual doesn't lie. 1 Quote Link to post Share on other sites
Member Contributer jdmtrinidad 5 Posted October 16, 2019 Member Contributer Share Posted October 16, 2019 14.5V constant no matter what engine speed. 14.4V when the radiator fan kicks on and high beam. LED lights all around. Wire my bike vfrness, voltmeter, fuse block with grounding block, and Rick's electric reg/rec. Quote Link to post Share on other sites
Member Contributer interceptor69 50 Posted May 25 Member Contributer Share Posted May 25 That's a very tidy job. Wish my plastic looked that good. Sent from my GT-N5110 using Tapatalk Quote Link to post Share on other sites
