you dont relly need to tune these engines as they are not like nitro engines that need tuning often. Unless youve fitted a tuned pipe/second gears etc then the factory settings are fine, only adjustment you may need to do is after you have ran-in your engine but even then its not 100% needed & if you do its only a small adjustment of the mixture, thats whats great about largescale. no re tuning every 5mins like nitros \o/