2006 Arctic Cat DVX 400 Engine Issue

[toomanytoys]

My 06 dvx 400 has a Suzuki engine in it. And for the second time it has dropped a valve (2 different cylinder heads) Each time it was the valve locks that let go. Is this a common problem with these engines?

[swampcat07]

From what I understand it is from the heat build up in the valves and the seats. It appears that the factory materials used does not help dissipate the heat efficiently. Look to some aftermarket suppliers for kimblewhite or Ferrea valves and Ampco 45 or Beryllium Copper seats.

I would check the timing chain and cam and see if they are within spec.

[quadnut20]

I had the same motor in my 03 suz 400 ! The valves went out in it and upon tearing it apart I found a bad timing chain ! Fix all the problems and sold it to my buddy and still runs strong to this day !

[Ajmboy]

Check out this thread: http://www.quadcrazy.com/atvforum/arctic-cat-atv-forum/9200-2006-arctic-cat-dvx400-blown-engine.html

* Added year and manufacturer to thread title.