bigstu, except for ringing around UK Yamaha dealers to find a breather, I have put two links below where you could find this part.

The first is in Holland and appears to have expensive postage,

http://www.xs650.biz/

This one is in the U.S., and you may have import tax etc

http://www.mikesxs.net/products-40.html#products

Reggie wrote:bigstu, except for ringing around UK Yamaha dealers to find a breather, I have put two links below where you could find this part.

The first is in Holland and appears to have expensive postage,

http://www.xs650.biz/

This one is in the U.S., and you may have import tax etc

http://www.mikesxs.net/products-40.html#products

From what I can tell it's not actually a Yamaha part so going to the dealer isn't going to do any good. My best guess is that Mike from Mikes XS found a breather from something (could be anything from another bike, car or tractor) and sells it to the XS crowd.

Hi ,Big stu thanks for that explanation just what I was looking for, understand it all now Brian

bigstu wrote:Thanks for the advice. It is time to fit a breather. I am intending fitting the XS 650 breather when I can figure who to buy from in the UK. I think I will replace the seal anyway after fitting the valve. Does anyone know where I can scource this over here?

I got mine from here http://www.xs650.biz/p/28/2501/mo8-cg|txt=*breather* 13 Euros + shipping

Brian,
Before you pry out the old seal, look for the ring that retains the seal on your 850, it is very thin and hides just inside the casting.

Bill