Rectifier on early bikes is not a regulator... it's just a diode which is like a "one way" valve that only allows the "+" pulse of the AC power to get to the battery... in other words the rectifier converts AC to DC for the battery charging.

A stock or stock replacement "6 v" rectifier will not restrict the voltage if you go to 12 volts.

Some later models used a rectifier/regulator combo unit but the one in the ebay picture is just a rectifier.

.

Bought 1974 dt360 last week ,bike runs well, the lights don't work and tryed to check the retifier with a ohm meter, didn't get any Reeding,. would that cause the lights not to work

No..... assuming all the electrical system is stock.
If someone rewired it, then who knows....

Since Photobucket is the worst group of crooks on the planet, I have reloaded the How-To photos to the forum storage.

hi
i had a question have any off you put an regulator on your dt1 ?
i had some troubles with my rear light on my dt1 i replaced my rectifier and now my rear light works fine
but am i better i also put an regulator in my circuit ?
i burned out 2 front light bulbs before thats why i was woundering

thanks

kenny

I'v used them on various yamaha's over the years but a long time ago. Think i used to hook it with the blue tail light wire if yours is magneto tail light not dc powered [different markets have different systems]. Blue gets everywhere that matters right up to the headlight & instruments where they all hook together in the switch. If you have a good quality one i think you could join it with the yellow coming from the mag & that'll get everywhere except it's getting a hard time with lights off. Think the IT series Yamaha finned alloy one would [could] handle it ok. I'd better give a plug for Rex's Speed Shop but any of this type single wire from an IT250 [or any of the same] would work. www.rexs-speedshop.com/Yamaha-TY350-1985-86-Regulator
Just to edit my thoughts--the only reason via the blue wire could be a problem is 'if' the dip switch broke contact when changing from low to high beam rather than overlapping as it changes for a fraction of a second but not a very likely problem.