Is there a ball/spring assembly that keeps the gears engaged? I have an extra shift linkage and it has three indentions in the rod that looks like it would be how it stays in gear, mine keeps poping out of gear at full throttle. At low speed it doesn't pop out, just a full throttle and it take a few minutes for it to pop out it doesn't do it as soon as it is throttled up. Could this be the clutch dog?