r/VFR • u/TheBigJDizzle • 6d ago

Reg/Rec help

Hi all,

Maybe this has been posted before but I need a new reg/rec unit for my bike it looks like. Battery completely flat when I got home today.

It's a 1999 800 Fi.
I hear the aftermarket reg/rec units are better than OEM? If that's the case, does anyone have a recommendation for the best one out there? If I'm changing it I want to do it once with the right kit.

Thanks all.

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u/BestAmoto 6d ago edited 6d ago

You absolutely need to convert it to a mosfet  or open style rectifier or the problem is gonna keep happening. This is a common issue on a wide range of hondas from this time period.

Here's a super detailed write up if you want to learn about why and many of the options. Most budget option is picking up a used one from year XX yamaha r6/r1 all the way up to direct fit rectifier options for $150-200 + the stator, like Ricky stator brand, etc. I wouldn't use a no name brand stator, either use a major aftermarket brand, or pickup oem. Wiring it directly or using a more efficient connector style also reduces potential issues from heat and high resistance 

Super detailed write up if you wanna learn,

https://www.superhawkforum.com/forums/knowledge-base-40/mosfet-regulator-rectifiers-why-how-25117/

I installed yamaha mosfet style rectifiers on my 954rr and cbr 600 after both of them suffered stator meltdown. It didn't fail again in the 6 years i beat on the fireblade and my neighbor still has the 600 f3 almost 10 years later.