Motor was twisting in other chassis , pulled out put in a lightened stock chassis with all the same bearing supports . Chain snapped when I finally loaded clutch up with a significant amount of spring rate to get on bar . I have since gone Regina drag chain couldn't be happier stretch once set it and forget it , like all the rest of their chains I've used . I see a whole lot of people using ybn chains is why I asked I can't fathom how a 30$ chain is holding hp most likely put one in Stock as a spare .