[Sportsterboy1974]

Originally Posted by HOG maniac

My Evo has been blowing out oil for quite some time. I have fitted a breather kit as it made a mess on the bike.

Mine too...i have recently replaced the umbrella valves but still find that the bike is using up quite a lot of oil when ridden fairly hard. I also use a breather kit. I recently did a 1200 conversion using KB pistons and have put about 1000miles on the bike since. My mate said that the oil usage was maybe due to the bike running in? It's definetly losing most of it from the breathers and gets worse the hotter the bike gets. I put about 400 miles on the bike this weekend and was riding 80mph plus on motorways for long periods..the air was hot! I reckon it must of used almost a quart of oil! That seems excessive to me! I would be interested if Phil could explain about spacing the umbrella valves...what does this involve? Cheers