I have purchased two Super Tigre's. One is a G51 and the other a G61. The G61 is used and I cannot get it to run. I noticed the high speed needle on the G61 was going into too far and I looked at the G51 which is new and there is a spring and a small o ring in the opening for the high speed needle. The G61 does not have this. I looked on the parts break down and the only spring I see is a barrel spring that is also missing. Can anyone with knowledge of these motors help me? Do I need to contact Super Tigre and see if these parts are available? Any carburetors that will work in this engine? I have been in this hobby for a long time and never ran into this problem with the Super Tigre. Any help would be appreciated. Thank You Rib Man.