I got about 170 miles on my new WR so far the mods are as follows, Throttle screw, Grey wire, exhaust silencer in tip removed and uni air filter (main reason for air filter is so I have one ready to go at all times). Soon to do rejet, extended fuel screw, AIR removal, maybe a promoto billet tip or some type of slip on. Today I was riding around on flat ground I did a few runs just to see how fast the bike felt. I hit the rev limiter for the first time. My concern is while the bike pulls hard all the way up It don't sound healthy for a big thumper to wing that high . I have read just about everywhere that these yamaha engines like to rev but will they take 12000 rpm for long or do ya think it will grenade . Now I come from the automotive world when it comes to engines about 25 years as a professional. I know you can take just about any newer production auto and it will live all day on the rev limiter without really hurting anything in the engine. Is it the same for bikes .Any opinions on this welcome Thanks!