I have made a feeble attempt to comb through forums to locate info on original fuel tap filters for the DT's, all I can find are folks that add inline filters. I'm not totally against this but I really like the clean look of the fuel line going directly to the carb. Aside of a company in Italy, OMG Italy, I cannot find any resources on filters for the petcock bowl, (short), and the in-tank, (long) cylindrical screen filters. Does anyone have a resource for these? I have found re-pro petcocks but cant rely that the filters are the right diameter to fit stock properly even if I bought the whole petcock. This is one of the last items I need to address on the 76 DT 250 restore.



Thanks in advance

I don't think the original bike had a "long" filter in the tank? I think that's something that started on newer petcocks. There was only a mesh filter in the little bowl of the petcock.

Anyway, Rick C. and others give good advice on the topic in this thread. I didn't read it again but remember that Rick might make or have the screens?

yamaha-enduros.com/index.php/forums/1968...k-net-filter?start=0

DEET is always a good person to check with on parts too...

I made one for inside the tank from fine stainless steel fine mesh. Just cut a small square of mesh, roll it up into a long cylinder shape slightly smaller than the fuel tap hole and keep hold of it to stop it unraveling. Crimp one end and fold it over and poke the open end into the fuel tap hole and it will expand to keep it in place. Search ebay for 400 or 600 mesh count stainless steel mesh.

You can buy brass mesh screen and make them yourself.

I am also looking for original filter sock for my 465. Original is not a brass mesh ,I am thinking about chevy 70 sock in my PU truck as it is far closer to OEM.

I have a couple oem petcocks from a DT2 and DT3 here, neither had the long screen but do have a screen for the reserve. Not sure that's ideal, so I'm going to add screen for the long stem. Not sure how restrictive the typical brass screen is, so a little creativity is needed. Can't just cap the inlet. Also, needing the sediment bowl gasket. Can't find that, so I'm going to buy a small sheet of Viton and stamp a few. If there's a need for these, please pm me.

Bowl "gasket" was probably an oring?

From what I have seen from images, scrap yards, etc. is that a screen was used at the bowl and at reserve. The bowl some have shown a large flat screen which is incorrect since it doesn't allow sediment collection in the bowl. Reserve is clear since it draws at base of petcock, so a screen is required. Normal flow from long tube no screen required since it is elevated away from tank sediment.

Great suggestions, where I'm at is that I will be soldering my own using 200 mesh brass screen and brass fittings. I have decided to tap petcock reserve and sediment bowl with M10X.75 so I can thread the filters in rather than use plastic with interference fit. So far on old junk valves the tapping is working out, just need to set up mini lathe to cut threads on the mini brass fittings I have made. Going a bit far but looking for a long term solution to make sure I can run all bikes without inline filters. Only reason is I don't like the looks... I will post some pics when complete.

Thanks everyone for the input.

What you are saying depends highly on what type petcock you have... flat screen was used on most and as far as I remember only later model (or replacement) petcocks had a separate reserve filter up in the tank.

You might be rebuilding a "replacement" and not an "original"... can't tell as I don't remember that you posted pictures.

Or maybe it's just that I don't remember the petcock designs accurately... which is VERY likely.

In any case it doesn't matter... as long as you get the filtering you want! Please post pictures of your work so we can learn from what you are doing!

Good point on the pictures, will get some for this topic tomorrow. Confident it is stock. Fortunately I have a great resource an hour away, motorcycle salvage yard with tons of great stuff. All of the petcocks pulled from this vintage show identical scenario, reserve screen, bowl screen. Both cylindrical at about 8mm. The bowl screen is shorter to fit, both plastic framed filters. I was the first to get to these so that raises confidence as well.

Will post some pics tomorrow and next week of the completed replacements. Hopefully that will help to shed additional light on the subject.