i just got a new 400 4x4 grizzly and the owners manual says i can not go above half throttle for the first 10 hours and dont go above 3/4 throttle for 10 more hours then i have to take it back to the dealer to have the valves adjusted... is all this really ness??

 

well its kinda mess just dont give it hell while breaking it in dont top it out yet

 

My wife rides a 07 Grizzly 400 and its a great bike. If you vary the speed you'll be fine. Don't worry too much about it. There are many schools of thought about break in on a motor but I feel as long as you don't keep to a constant speed for 20 hrs or so it will be ok. I would get the oil changed at 20 hrs and the valves checked but I doubt they'll need adjustment by then. Enjoy!

 

The first 10 hours are the most important. I just changed the oil in my Raptor. I would suggest that as well, although not all people will say the same