I have a 2008 CBR600RR and I did an oil change at my dealership at 600 miles and found out a week later that the oil they put in was 20w50. So I ordered amsoil 10w40 and put it in my bike at 740 miles and my oil filter is the Honda oem. Now my bike has a hard time shifting from first to second. It feels like it is sticking so I have to force it in to second and also there are times where my bike hits neutral instead of second. It always alternates between shifting it hard to second and goes straight into neutral. All of the other gears from second to six shifts smoothly. I never had this problem when I first got the bike and after the dealership did the service. Now I have this problem with the amsoil. Any ideas?