Idle mixture screw O-ring needed

[willie]

Like the title says, I'm in need of the o-ring that goes on the idle mixture screw. The problem I'm having is that its for a '77 RD400 and is no longer available. FWIW, I've been to NAPA, hardware stores, Yamaha dealerships (Parts guy there told me IF it was available the o-ring was $5.99) and several auto parts places. No one has a selection of o-rings that I could pick from. So, does anyone have any ideas where else I should try?
I posted a similar question in the Brakes section looking for a dust boot for the rear master cylinder. As I explained there, I know I'm not looking for help with a GS but I'm posting here anyway because my experience with this board has proven that the members are incredibly resourceful (no pun intended) and extremely helpful. Especially when compared with every other board I've interacted with. We rock! LOL
Anyway, I sure appreciate any advice I can get.
Willie

[steveb922]

Same people - but check the o-ring is included.

http://www.economycycle.com/servlet/the-255/Yamaha-RD400-Carb-Repair/Detail

And ask for a shipping discount!

[willie]

Thanks again Steve. I found the same kit after searching the link you posted in the Brakes section. I don't mind being called cheap for not wanting to spend over $30 (incl shipping) to get an o-ring. I'm tempted to go with the 50 cent option available at the hardware store. Problem with that one is that its the wrong material and wouldn't stand up to the gas. However, and this is my rationalizing skills speaking, I doubt it'd see enough gas to be a problem. And, even if it does breakdown, a) it'll probably swell, making for a better seal and b) for 50 cents a pop, I wouldn't mind replacing it every now and then. lol
Willie

[Agemax]

try cycleorings.com Robert Barr is a member on here. he will sort you out

[willie]

Thanks. You have a response to your response to my PM.
Willie

[Nessism]

Do you have a set of calipers? If so, measure the needle then go to McMaster Carr and look for an O-ring that will fit. O-rings are sized by ID and thickness. You want an ID about .5mm smaller than the part it installs on. Select the thickness based on how much space you need to fill in the carb. I have a section of O-rings so ping me if you figure out what size you need. I may have some.

[willie]

AWESOME!! Thanks alot! I'll measure it tomorrow (my calipers are at a friend's house) and PM you.
Yet another example of why the members of this board are so friggin great.
Willie

[bomber737]

I got my little o-rings from fastenall. There might be a store near you or look at McMaster car, they might also have them. IF there is not a fastenall near you I think you may be able to order them on their site. If you can find the size that would be the best way to find them on their sites. You will also have to order 50 but they are quite cheap.

[bwringer]

There are a several shops that specialize in RDs. One of these should be able to sort you out, but you'll likely have to call or email.

http://rdsonly.com/

http://rdsonly-fremont.com/

http://rzsunlimited.com/

http://www.mikesxs.net/products-110.html

http://yamahard.us/

[willie]

Thanks alot BW. Robert Barr responded to the PM I sent him last night. Doubts he has what I need but offered to look at what he's got if I give him the dimensions for the 0-ring I need. I just measured it and will PM him with them. I really appreciate the links you posted and will be checking them out.
Willie