hello all ! im having trouble with my bike (2001 honda f4i), i been riding it for 6-7months now. The battery died out on me so i bought anther battery, i rode it for while and it started to keep on dying on me. The battery wouldnt hold charge i brought it to the shop and they would test my battery and said it was low, and they also mention about the regulator rectifier on it..and maybe it would be the problem. They also test the bike with the engine is on, the Voltage would stay around 12's, i read on other forums that if it would stay around 13-14's and thats what the guy at shop told me too. They Helped me charge the battery again and it start right up. i rode it home from the shop. At every stop, it will idle down and cut out on me. I can start it back up but it keeps doing it unless i rev the throttle to keep the bike on. i was wondering if its a regulator rectifier problem...please help.

 

it could be the rectumfire

 

theres a couple things it could be, stator or reg/rec. if you know how to use a multi-meter, BIKE OFF just unplug the stator, do not remove the stator cover from the bike (the plug with the three thick yellow wires) that plugs into the reg/rec. now looking into the stator plug, set the multimeter to ohms/resistance and test all three connectors to eachtoher (left to middle, middle to right, right to left, any order, doesnt matter and nothing can be hurt in any way at all) you should get about .03-.04 for each reading, if any of the readings are way wrong like a four digit number, something crazy, its your stator. another test you need to do on the stator, in the same ohms/resistance mode on the multimeter, take one lead and attach it to the NEG battery cable (GROUND) you shouldnt get any numbers at all. if you get any numbers your stator is grounding out, meaning its bad. the last test for the stator is a running bike test, start the bike, then unplug the stator, have your multimeter in the AC setting and go from post to post on the stator plug (dont worry no damage can be done and no shocks) you should get pretty high numbers, i want to say around 140 ac volts, either way if you get low numbers like around 50-60, it most likely no good. as far as the reg/rec goes, you want to check and see if your stator is crap first. if the stator checks out good, try and get ahold of someone with a known good reg/rec swap em. then do the same running bike voltage test the shops did. start it, it should be around 13-ish at idle and rev up to about 4-5k should go as high as 15.3 (15 is high but still useable) as long as the battery is known good and full of water/acid those are the only two charging parts on the bike you can test with out taking the stator cover off to test the flywheel/rotor. (rare to go bad so not worth testing unless the other two are for sure good)

let me know if i missed anything!!