Yamaha motor noise roadliner 1900 - Yamaha 1900 XV 1900 A Midnight Star

SOURCE: 2006 yamaha roadliner 1900 rattle under gas tank

You will find using a premium fuel or an additive will rectify this is over time. If using standard Unleaded fuel will dry out the valves making this noise. Noise is more noticable after using Ethanol / Blended fuels.
Regards,
Alex

SOURCE: I HAVE A 06 ROADLINER 1900 FIRST OIL CHANGE I USED

I also have an 06 Roadliner. I use 20w50 Lucas sythetic motorcycle oil with great results. Will later switch to Rotell T Synthetic 5w40 (Dark Blue Jug at Walmart) as it costs alot less than Lucas.

What the heck is a Husaberg?

SOURCE: can i lower the seat height of my 2006 roadliner?

best way is to take your cover off your seat and shave it down about 2-3 inches...then put some memory foam in it and recover...its more comfortable and it will lower your seat height.