Has anyone ever had a cdi box go bad? I have one that I suspect is going bad. My quad sputters at high end rpm's and the other day at the sand dunes, as I was running at top end for about 3-5 minutes, it just died. I was able to restart it and limp it back to the parking lot. After checking the valves, (thought I burnt one) every thing looked OK but now it just misses at high rpm's again. I've been told to replace the CDI box and the regulator at the same time so I don't burn the new CDI box out if I do have a bad regulator. Also, where is a good place to get a stock CDI box for a 89 warrior? The stock number is 3gd-85540-00-00? Prices I've found are around $300-$375 (ouch) Help!!!