I bought a beautiful 1973 Yamaha dt250 all original. The headlight didn’t work so i tried taking the headlight apart and I saw that someone on another forum said you have to take the glass out to replace the bulb and I tried and broke the original glass. It hurts me cuz it was all original. So my questions is do they make replacement glass and was that the actual correct way to take it out? And I still can’t even get the bulb out it’s like stuck in there. Do I have to just buy a whole new housing?

Original headlight is not meant to be repaired... and yes, the instructions you got were incorrect.

Some have pried the bulb out of the back of the reflector... which obviously would require breaking the actual bulb as the hole in the back of the reflector is too small... they dump out the broken bits and then glue a new bulb like a modified H4 into the hole. Total waste of time in my opinion because the filament has to be in the right place for the reflector to focus properly. Light might be "bright" after, but usually useless pattern and you can't see anything with it.

So long story short you really didn't screw up... when original headlight burns out you're supposed to replace the entire assembly.

You can probably find an original new bulb on ebay or maybe contact members Enduronut or DEET to see if they have one... probably very expensive but "original" seems important to you.

Other options are replacement sealed beam from ebay seller pobit or even a 5 3/4" lens with replaceable bulb can often be used. Search the forum as it's been discussed many times.

Last comment is consider installing a factory Yamaha one-wire regulator (OEM, not aftermarket) or one of the aftermarket three wire regulators DEET recommends. There is a service bulletin in the tech library on the Yamaha regulator and posts on the forum about DEET's. If you don't use a regulator, chances are you may blow the headlight again... especially if your battery goes bad. (Long story as to what the battery has to do with the headlight)

Welcome & agree with everything MarkT says & will save me having to write it lol. single wire regulator is a 'must'. Not sure on the three wire type so must have a read up myself. Down here [in NZ] we only got the replaceable bulb type headlight which was a bit of a blessing but do remember Hondas we sold in the early days having fully sealed beam lights but don't recall replacing one as most were 12 volt battery lights & battery ignition so fully regulated. Maybe they were only big 6 volt electric start but anyway, was a long time ago Bring back the "60's & "70's, well i suppose we're re-living them now anyway.

yamaha-enduros.com/index.php/forums/how-...lator-shootout#43886

Pheww well that took a huge load off my back. Thank you so much for that reply. I’m just a young kid trying to ping his dt. Is there anyway you can send me a link to the guy selling headlight assemblies on eBay can’t seem to find him. I saw deets besides showing the lot loads on the regulators. So the higher the volts will make the headlight blow? I’m still learning about elitrical stuff

Hard to imagine but back when these bikes were new, semiconductors were somewhat new and expensive. So the electrical system was designed to be "balanced".

Think of the magneto as a water pump, the electricity as the water, the voltage as the water pressure, and the lights as "water leaks" where the electricity goes.

If you plugged all the "water leaks" in a piping system, the pressure in the pipes would go up.

Same thing with the original Yamaha electrical system... if you remove a bulb or electrical load, the voltage in the system goes up... which will often blow out the remaining bulbs.

The Yamaha voltage regulator (started coming on the bikes in about 1976) senses the voltage and allows electricity to "leak" to keep the voltage from getting too high.

That's kind of a simplified explanation and obviously water is not the same as electricity. Bottom line is a voltage regulator is a very good idea. Here's a link to Pobit's light bulb:

That's a fully sealed unit above on ebay, or was it meant to be?.

Some bits to start with but i'll keep looking. Here's a bulb
Heres a rim for the very early model but later might be just clipped in not sure, just showing you sort of roughly what you need to change. Bulb holder socket Still need the glass unit reflector.

I give up, but here's a complete light for a smaller trail bike for not much cost. Chances are it's a 6 volt bulb looking at the bikes it's listed for, but has a replaceable bulb. the bulb will be a different fitting to what i linked to before. This will have three ears where the yamaha one will have 3 pin slots to locate. Anyway, was just a cheap option to play with if all else fails & bulbs should be cheap. Doesn't say what bulb is in it at the moment.

Just doodling googling finding things maybe of no use, have to note how it mounts, or modify it. says 6 volt bulb & socket which make it sound replaceable bulb but no pic of the bulb type.