Not a 4 speed model they were not available at that time on the Trail 70, Late 1970-73 you could get the 4spds. They were only ran for three years here in the USA with four speeds and all other's were three speeds if there still original and the frame numbers will tell you if it is the a true four speed. Looking at the pictures its a three speed bike. and is that the one you hack the neck off of.