I'm trying to synchronize the throttle and spark advance and I'm having trouble. I just reclaced the follower because it was cracked, so I installed a new one. I'm trying to get the butter fly to open by setting the wheel between the two hash marks, but I'm out of adjustment, the set screw is bottomed out. I used the old wheel, as it didn't come with follower. Could it be worn out? Any one run into this problem? Thanks.....Robert