If you are using the Denso motor on a collecting device you may want to have some speed control to optimize the efficiency of the collector vs power utilization - hence a Jaguar is the best choice - available from Digikey:
http://ordering.digikey.com/Promotio...mpetition.aspx
Spikes will not give you this speed control.
Solder to the leads on the motor connector and then heat shrink.