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Hello all. I have just bought a kdx 200 1989. I want to convert it from AC to DC add a full loom ignition and battery so I can have indicators etc. Has anyone done this and any help would be appreciated. I'm in the UK. Cheers Tim.

Hi, Tim. I think you'll find everything you need to know in this set of forum posts:

viewtopic.php?p=165057&hilit=float+ground#p165057

Tim, Many riders that make the elerictrical system you want to use rectifier/regulators like this one (link below). However, some are using China--made to save a few bucks and experience the fun of seeing whether or ot they work.

https://www.rockymountainatvmc.com/part ... gJB8fD_BwE

Thanks guys much appreciated good with mechanical work but not the best with electric

Timbarber wrote: 04:31 pm Feb 17 2026 Thanks guys much appreciated good with mechanical work but not the best with electric

Then you fit right in. There is a series of wiring diagrams in the above linked forum page. These diagrams are very good and should help you a lot.

billie_morini wrote: 03:14 pm Feb 17 2026 Tim, Many riders that make the elerictrical system you want use rectifier/regulators like this one (link below). However, some are using China--made to save a few bucks and experience the fun of seeing whether or ot they work.

https://www.rockymountainatvmc.com/part ... gJB8fD_BwE

I have that exact regulator rectifier on my 1997 220. My other KDX220 has the AC voltage regulator and a Cyclops Adventure Sports inline rectifier. Oddly that regulator rectifier is not shown on the Trail Tech website any longer for some reason, yet I can find it all over the Internet for sale. The $29 AC voltage regulator that I have is shown on their website still. Odd.

The one you linked is definitely the nicest one on the market for our purposes, and is the one necessary if running a battery to power lights and cooling fans when the engine is not running.

Chuck, in part said, "...running a battery to power lights and cooling fans..."

Fans?! That's neat!

Chuck, please tell me what this feature is about for the hyperlinked Trail Tech rectifier/regulator. Why is aautomatic shutoff bneficial? What happens if you don't have automatic shutoff?

"Built in relay activates switched 12V DC output line only when engine is running, with adjustable shut-off delay"

billie_morini wrote: 11:49 am Feb 18 2026 Chuck, please tell me what this feature is about for the hyperlinked Trail Tech rectifier/regulator. Why is aautomatic shutoff bneficial? What happens if you don't have automatic shutoff?

"Built in relay activates switched 12V DC output line only when engine is running, with adjustable shut-off delay"

I believe that is for bikes which run a battery, so the battery somehow doesn't slowly discharge? That's just my best guess but I believe that to be correct although further research would be necessary to guarantee that assumption.