I put that up because a guy with a 50 asked how to hold the Variator when taking the nut off. Of course I said that most get an Impact Wrench but if no tools here is a way to do it. And that is what it shows which you will only find on a 50cc scoot.
But like anything you have to have some noodles up there know what I mean. If you don't then no matter how you do something the Odds are you will make it worse than it was to start off with(HAHA). Alleyoop
the best way i've found is to remove the spark plug feed some rope in there turn the motor till the rope stops it then you can take the nut off variator. then put back on same way. then pull rope out of cylinder, and put plug back in ! worked good for me THIS WAS ON A 2STROKE MOTOR DON'T TRY THIS WITH A 4 STROKE MOTOR THE ROPE CAN GET CAUGHT IN THE VALVES AND BE A BIG PROBLEM Derail
My pulley cover has two holes cast in it for what looks like a tightening tool. I took a piece of 3 inch bar stock, 3 feet long and drilled 3 holes in it at the far end. One large center hole for the bolt. Two smaller holes to match the cast holes in the pulley. Two bolts in the holes, and 2.5' of bar for mechanical advantage. Now I have a "cheater bar" that makes it easy to pull the nut. Only had to do it once actually. I use the "Compress and slip over the pulley" method now to change belts. No need to remove the pulley bolt on my scoot.