I have a 2009 DRZ400SM..... hot cams, 39mm carb & JD jet kit, full FMF exhaust, K&N air filter, and just this week a JD Big bore kit (Soon to port head). First question is a $300 investment in a Dyna FS CDI Ignition, worth it in my bike combo. This is the one I am looking at; http://cgi.ebay.ca/DRZ400SM-DRZ-400SM-Dynatek-Dyna-FS-Ignition-Rev-Box_W0QQitemZ250566838775QQcmdZViewItemQQptZMotorcycles_Parts_Accessories?hash=item3a56f289f7#ht_500wt_1182 I have heard horror stories about guys spending $300 and more on CDI boxes that are crap and just cut out when rev limiter is hit. Question 2, I have also been looking at the AMR MONSTER COIL to go along with the my mods. Will i notice a difference with that bit better of a spark? It says 34% better spark so thats a bit stronger, but enough????? ANY INPUT! preferred from experience no "he said she said" would be much appreciated!