Drain Screw O-Rings

I have just put my 77 KZ650 carbs back together after a cleaning, and one is leaking at the drain screw. It turns out that the o-ring is bad. Anyone know where I can get replacements? If not, McMaster Carr has a huge selection of sizes and materials, but I don't know what I need. Anyone know the specs of the o-ring I need?

Thanks.

6mm I.D. for the "O" ring........ I went to a farm/auto supply outfit and bought a couple of those plastic, multi departmented boxes with a gazzilion different sized "O" rings from tiny to huge. They don't cost much and are very handy. They have saved me several trips already.

I found the exact size at Home Depot. Just be sure to take one of the originals with you to compare.
Ed KZ650C1

Thanks for the info. I've struck out at the local discount auto part stores. And motorcycle shops for that matter. Turns out they can only find a part if they have yr, make, & model of something they sell and can look it up. At least the guys at the auto part stores went into the back to try to match it up. The guy at the Honda/Yam dealer asked what bike it was for. When I said Kawasaki, he said "we don't carry hard parts for Kawasaki's". I said "it's off a Mikuni. There's a lot of Hondas with Mikunis". I got a blank stare. I'll try Home Depot, and if that doesn't work, I may order some 6mm o-rings from McMaster Carr.

Thanks.

del

this guy is great and supply's every o-ring that you could need.

www.cycleorings.com/

this guy is great and supply's every o-ring that you could need.

www.cycleorings.com/