17 inch rear wheel

[jetmechmarty]

Sprocket removal tool.

I have this one. It works for removing the sprocket. It did for me.

 

[Kevin Werner]

Th
They are usually reputable in the custom bike scene but mistakes or oversights do happen.
It's a 39t sprocket, not ideal but should be okay for the street. The studs dont hit the swingarm but there is enough clearance for it.
I'll try the in gear and impact but it seems to be on tight.. once I've got that sorted I should be able to take it for a slow spin down the street. Fingers crossed wheel centreline alignment isn't an issue

I used my cheap Harbor Freight 1/2 impact driver and the sprocket nut came off easily. (...It's a 39t sprocket...) Up 5 or 6 teeth means approximately 15%-18% increase in revs in the same gear at the same speed.