Put the YZF jetting in the bike tonight and started it up to the same stumble as before. Just for grins I unplugged the TPS like the guys on the 250 forum are doing to check the CDI on their bikes and lo and behold the bike runs great. Then I pulled the tank and reconnected the grey wire to see what effect it would have. With the TPS and grey wire connected the bike ran like crap. Unplugged the TPS again and the bike runs good but not as good as the grey and TPS disconnected. After reading numerous post on the 250 side I feel my CDI box is toast. Any Ideas?