If you have a moby, and you truly want to blast, here you go.
The infamous Doppler Clutch Pulley. When you get this, make sure you break it down, grease all the bearings, and locktight everything back together. There are tons of rotational force put on these rip engines.
This one is made for Motobecane.
This is the new 2019 version now, photos shows previous version but you will receive the new one that just came out in 2019.
New Pics Coming Soon!