Being in so cal I would use Eric at Empire Industries to build a 18mm dmx with a set of his billet cyclone carbs and a set a custom shears built for the motor,he builds some fast bikes and will go out to the dunes with you to race and help tune not many other shop owners will do that but he is a true racer and hill shooter,for a chassis you could use fireball engineering they built nice super light chassis,Matt shear builds nice chassis and the best custom pipes that you can buy