Hi, I did a search on the forum and didn't find my answer so sorry if this has already been discussed before. I'll do my second oil change on my Hammer soon and I would like to have some inputs from K&N oil filter users here. I want to know if the tickling noise at the start-up is quieter. They are build with an anti drain back valve so I guess that it should be better at start-up because the oil don't return completely at the base of the engine. I always used them on my cars and bikes before without any problems. I first tried K&N on a Chevy V6 3,4L and it really helped with the valve noise at start-up due to the hydraulic lifters, especially during winter so I'm curious to know if they can do the same on a Victory engine. Thanks !