Vader BD125-10 Gearshift Linkage?

[Big Bird]

They have strait cut gears so they need to be broken in before the shifting smooths out. They also have a very long range of clutch adjustment so the typical freeplay at the perch setting doesn't really work on these cause the cable has tension well before it starts to release the clutch. You have to adjust the freeplay based on the actual clutch spring tension and not the clutch arm spring tension. A good way to check is if it bucks hard when dropped into 1st gear its probably not disengaging the clutch enough when you pull the lever. And it will also want to move forward with the clutch pulled. And finally the oil, I had to repetitively change the oil which normally would be considered excessively during the first few hundred miles. And each time the shifting was better till the oil deteriorated at longer intervals until about 500 miles when the shifting finally became consistent and way better than when new. Although it will never be as good as the CG engines.