Today I have recived the new gear ratio 8:2:1 for my avro nice package it comes with the following 43T drive pulley - engine spacers - new engine mount
ok i used to run the YS SR with the old gear ratio which was 8:00 the new gear ratio is for the os which is 8:20, as my kit is one of the first kits which had a wrong gear ratio so the os will like the new gear ratio more power and higher rpm to run
