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TOPIC: headlight for my dt discontinued

headlight for my dt discontinued 16 Apr 2019 13:39 #11

  • MarkT
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ScottMalv wrote: hey thanks guys, sorry, the bike is a 1978 DT 250,

i'm considering ordering the voltage regulator from Rex's SpeedShop RXS100 6V.

the battery is relatively new, and yes, i just started the bike, light was on momentarily, then out.

thanks for the link and advice.


1978 would have had a regulator from the factory... and needs one much more than the older models that were designed without one. Have you checked to see if your regulator is installed and connected? Should be around the battery/airbox/oil tank area. Single yellow wire to harness. Case has to be grounded so often there's a ground wire to a mounting bolt
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1963 YG1-T, 1965 MG1-T, Allstate 250, 1970 CT1b, 1971 R5, 1973 AT3MX, 1974 TS400L, 1975 RD350, 1976 DT175C, 1976 Husqvarna 250CR, 1981 DT175G, 1988 DT50, 1990 "Super" DT50, 1991 RT180, 2017 XT250

headlight for my dt discontinued 24 Apr 2019 20:27 #12

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well, i ordered a new regulator from Rex's Speed shop, went to install it tonight, and found that the VR had been disconnected ( yellow wire) near where i was fumbling to get the gas tank cross over tube connected. Reconnected the old VR, put some fresh 10A fuses in the holder, installed the new 6V H4 bulb and it worked great!

thanks for your thoughts and advice.
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headlight for my dt discontinued 25 Apr 2019 00:08 #13

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That's great news Scott, well done.

The nosey part of me would wonder why the original regulator was disconnected in the first place - possibly just by accident?

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headlight for my dt discontinued 25 Apr 2019 06:34 #14

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yeah, just by accident, or maybe while i was trying to connect the cross over fuel line? i have the original cable tie on it now holding it securely.

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