I found a guy selling a 92 VFR 750 but he says that it not running. He thinks that it might be rectifier issue. I can do work on bikes but don't know much about how things work. How hard is this part to replace on this bike? How can I know if it is actually a rectifier issue? Could anything else have been damaged from trying to start the bike with a bad rectifier? Can anyone tell how much this part might cost? A lot of questions a I know but I dont want to miss out on a good deal if it is an easy fix and nothing else was damaged. Thanks. I have been a member here but sold my VF700 last year and really want to get riding again! Seller also said that bike turns over but doesnt want to start.
It's a simple device that takes the incoming AC current (yellow wires) and converts it to DC current (red & black wires) Rectifier/regulator/RR failure on the VFRs is pretty common. There are up-rated units on ebay, but they will cost you a fortune. I got one from a 2006 CBR600, removed one frame bolt and it dropped right in, just had to do a little re-wiring. The CBR unit has a nice big heatsink and cost me less than $20 off ebay.
I could be wrong, but I think the bike would start even if the rectifier was dead. So test it with a good battery, maybe?
If I remember correctly, my 91 wouldn't start without the regulator. ...but I may have been dealing with numerous other problems at the time, including a ton of water in the muffler from being left outside ! The early VF/VFR models have seperate red/black outputs from the regulator that go to the battery and the electrical system where the later models have just one pair so it stands to reason that you might be able to run the bike off the battery alone on a later model.
bike should run with regulator unplugged as long as battery is good. if you need to buy a new one, figure about $125 to $140, and it's very easy to change.
correct, but to clarify, there could be a closed short in the RR which would prohibit the engine from starting. If the RR is connected, disconnect it. If the bike doesnt start from there, check fueses. If all fuses are intact, and the RR is unplugged, and it still doesnt start, check the battery. Here's a stent where Mario98 needed some help. http://vfrworld.com/forums/how-articles/21756-5th-gen-rr-swaps.html also, I have a thread in the Mechanics section all about R/R's
