I am a 5'4" female rider who has problems with the height of my YZ426. Any suggestions for lowering the suspension without sacrificing? So far I've had the seat shaved 1.5". I have heard you can lower the front forks about another half inch. Is there anything else I can do? Also, I'm in California so I need a spark arrestor on my pipe. Any suggestions there? And what kind of power gain or loss am I looking at?