Universal engine block mount chain tensioner for 3.5 HP to 7 HP gas engines. Fits Predator 79cc, Predator 212cc, GX180,GX200 and many other small block gas engines used on minibikes , go-karts , barstool racers. No need to adjust motor for chain tension when using this block mount tensioner., simply slide tensioner into the loose chain then and tighten the lock bolts for easy adjustment.
Used with, # 25 , # 35. # 40 , # 41, and # 420 roller chain