Mikuni VM Fuel mixture screws (up close example)

[badfish]

I have been tearing my carbs apart on my 79' GS 1000 to find all the bad parts that need replacing. Obviously almost every O-ring is either cracked, brittle, or torn. All of my fuel mixture screws have some funky waves in the taper. Hard to see with the naked eye. I can feel the difference by running my fingernail down the taper. So I took this up close shot to show how badly these can be worn on our 30 year old bikes. Enjoy!!

http://www.flickr.com/photos/shadzshutter/8415542114/

[hampshirehog]

They don't suffer from wear that causes anything to go wrong. The problems arise when they get broken and the tips snap off. Plus the worn o rings leak petrol of course.