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Regulator/rectifier Question


Guest nummy

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Guest nummy

Hello everyone -

Does anyone know if a regulator/rectifier from other Honda models will temporarily work in a 1998 VFR 800?

It seems like I'm still having an occasional charging problem because when I connect my Battery Tender after riding, sometimes it shows the battery fully charged in less than 30 minutes - sometimes it takes 4 hours.

I did the electrical test covered on this forum, as well as the diagnostic steps in my shop manual. From my limited background, it appears that it is a regulator / rectifier problem.

I have a pal with a few spare R/Rs sitting on his shelf from a Honda F3/F4. Are they essentially all the same?

The reason why I'm asking is I would like to confirm that my problem is in fact the R/R before I purchase a new replacement. It would be great if I could hook-up a used R/R temporarily just to see if I am able to put voltage back into the battery. It would be a waste if I purchase a new R/R, only to find-out later that the stator is bad.

Can anyone help me with this question?

Thanks for your time !

nummy

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Spud786 -

I did all the stuff you mentioned below - I also said what generation it was.

I merely am asking everyone if the R/R from other Honda models can be used temporarily to verify that I have a bad R/R. From what I have determined, it is not a bad stator.

Thanks for the input anyway.

nummy

------------------------------------------------------------------------

5th 6th gen ?

6th gen

What voltage were you getting across the battery just above idle , it should be above 14 volt. If you dont see 14 plus volt, under any throttle condition, you have an issue.

Assuming all the electrical connectors have no resistance , if your were getting say no more than 12 plus volt under any throttle condition across the battery. then it rr or stator, 6th gens rr issues are not High failure , and even stators have better longevity than most models.

So I guess where are these simple voltages, your issue may be a case of just a weakening battery. My o6 battery got really weak at 45,000 mile, I couldnt even turn the headlights on for 2 minutes without running and there would be not enough juice to turn the motor over.

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just about any, you mentioned will work fine, but the plug will have to be reconfigured, a gsxr 1999-2006 works, a yamahama r6, r1 also works, a gold wing also works, just the plugs and mounts are diff.

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most any modern R/R can be made to fit. The older CBR models would be hard because their plug is molded into the R/R, and has larger sized wires on the positive and negative terminals. If you have a picture I can help more.

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  • Member Contributer
Hello everyone -

Does anyone know if a regulator/rectifier from other Honda models will temporarily work in a 1998 VFR 800?

It seems like I'm still having an occasional charging problem because when I connect my Battery Tender after riding, sometimes it shows the battery fully charged in less than 30 minutes - sometimes it takes 4 hours.

I did the electrical test covered on this forum, as well as the diagnostic steps in my shop manual. From my limited background, it appears that it is a regulator / rectifier problem.

I have a pal with a few spare R/Rs sitting on his shelf from a Honda F3/F4. Are they essentially all the same?

The reason why I'm asking is I would like to confirm that my problem is in fact the R/R before I purchase a new replacement. It would be great if I could hook-up a used R/R temporarily just to see if I am able to put voltage back into the battery. It would be a waste if I purchase a new R/R, only to find-out later that the stator is bad.

Can anyone help me with this question?

Thanks for your time !

nummy

'98 ? -- I'd put money on - it's the R/R anyway. The '98s seem to be the worst year for R/Rs on 5th gens.

MD

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  • 3 weeks later...

It was in fact the regulator/rectifier.

All is well !

nummy

Hello everyone -

Does anyone know if a regulator/rectifier from other Honda models will temporarily work in a 1998 VFR 800?

It seems like I'm still having an occasional charging problem because when I connect my Battery Tender after riding, sometimes it shows the battery fully charged in less than 30 minutes - sometimes it takes 4 hours.

I did the electrical test covered on this forum, as well as the diagnostic steps in my shop manual. From my limited background, it appears that it is a regulator / rectifier problem.

I have a pal with a few spare R/Rs sitting on his shelf from a Honda F3/F4. Are they essentially all the same?

The reason why I'm asking is I would like to confirm that my problem is in fact the R/R before I purchase a new replacement. It would be great if I could hook-up a used R/R temporarily just to see if I am able to put voltage back into the battery. It would be a waste if I purchase a new R/R, only to find-out later that the stator is bad.

Can anyone help me with this question?

Thanks for your time !

nummy

'98 ? -- I'd put money on - it's the R/R anyway. The '98s seem to be the worst year for R/Rs on 5th gens.

MD

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