You need A new track period 15 wide challenger extreme works well for me.
A light skid is nice, take of cat skid or Mt tamer I have a zx2 that works good.
(I Got one for sale as well) The shallower approach angle is the deal
Bark-buster front end. Light weight seat is nice. Timbersled drop brackets
I found the free flowing bike pipes to make a bit more power at altitude not so much down low.
I use a Mt mod hood without lights and have a lead dog helmet light in my back pack.
Kick some weight out of the primary to just stay of the rev limiter on the hard stuff that will put you in the middle of the powerband in the deep stuff.
If you have a sled like that set up properly and the 2 strokes beat you they
have better riders on them.
If you look around the internet and use some used parts you can get away without braking the bank.
Start with the track and cluching and drop brackets. light pipe ( have one of those for sale ) and take of the none esentials.
A grand and a bit will get you started and if you scrounge arround two and a bit get you close to 100 pounds down.
That said you can spend way more if you go retail new with stuff.