DMalikhain
CB750 New member
Hi, i'm new around here and i'm sorry in advance for my english 'cause it's not my native language. Anyway, i've recently purchased a 1983 CB750C DOHC, at first when i brought the bike home it lasted solid 30 minutes, then i came back to the garage and it stalled down. Gone through all the posts and found out my rotor, stator and regulator were way all out of spec. I've recently replaced all of 'em and right now i have a digital voltmeter attached to the handlebar that gives me the current battery voltage (i know it's not safe, i've only gone through empty street as of right now for test purposes). The meter reads ~14v when in 2nd gear and pushing above ~4500rpm and ~14.4 - 14.6v when above 3rd gear and pushing at least 4500rpm again. Could that be an issue and be depleting my battery? I've done those tests with the headlights on low and cruising for 30min max. Any suggestions will be highly appreciated, i've read a lot of times about rotor going bad when running due to centrifugal forces and resistance going up when hot, but that doesn't seem my case 'cause when going above 35mph it seems to be charging well and holding charge, also the Honda service manual gives ~14v spec when above 5rpm but i found a guide online where it says that i should get around ~14.4v even at 3000rpm so i'm scratching my head right now. Thanks in advance to anyone who'll try to help!