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  1. NINER

    Engine Build

    I only paid about $90 shipped for it with the filter, so it didn't break the bank by any means. Within 2 HP is close enough for me. Just looking for the most economical, reliable, daily rideable combo possible.
  2. NINER

    Engine Build

    The vortex airbox is an aluminum airbox that is basically like doing a 4x4 mod instead of a 3x3 mod. I don't know if the extra airflow CAPABILITY is really needed, but I got it cheap for around the price that I would have paid for a K&N filter and it looks cool. 12:1 runs on 93 or can 89 or 87 be used? So stage 2 hot cams, some ferrea valves, and some nice valve springs to make sure the cams don't beat them up too bad and I am good.
  3. NINER

    Engine Build

    So i have read a bunch of threads and figured out most of what I want to do to my DRZ. My ultimate goal is to make as much or a little bit more than a CRF450, buying parts and going up in power as the money becomes available. Here is my plan: Step 1- Vortex airbox with K&N filter (already have) FCR MX tuned for stock pipe Step 2- Above with Yosimura Stainless exhaust Rejet carb Step 3- Athena 94mm big bore kit Hotcams Maybe some mild headwork and valve springs My questions: Does this sound like a good plan of attack? Is Athena the best bore kit for the $? What compression ratio should the big bore kit be. It must run on pump gas. Will that compression ratio require 93 octane? What hotcams should I get? From wehat I hear there are stage 1, stage 2, and newer cams that have no stage designation Is headwork, valves, springs really required? I am looking for 45-50HP. Anything else that I am forgetting?