Check Point Motor
 

Huy guys,
sunday I have race first "Italian Championship" in Collegno where in July 2006 raced the word champion.
I have used for the first time the Check Point motor 12x1 but I have a lot of problem with the final ratio.
I have a Tamiya 415msx and normaly with all motor 12T in Collegno track used the final ratio 7. But with Check Point motor is not a final ratio correct and I have an explosion of my motor.
Can you help my to find the right final ratio?
Thank you at all and excuse me for my better english.

Enrico from Italy.