Originally posted by Roger
Just broke in my sirio .21 for my buggy and the thing is wicked fast. I've got the engine temping at 210-230 and its still fast. There is one thing that questions me still. I did the adjustment on both my stop idle screw and radio. The thing im noticing about this sirio is the throttle response is sensative. When I hit 1/2 throttle, the engine sounds like it's maxed out. And when I hit full throttle, it sounds the same with the same speed at 1/2 throttle ??? Thx guys for you input.
Try to adjust the throttle end point on your radio.