Had one myself & loved it. Were quite quick & had a smaller starter generator rotor than the earlier piston port AT1FE from 1969/70. This gave a lighter flywheel effect on this later model plus the reed valve etc. This motor was the first of the next generation of motor with that hardcase gearchange short shaft on the 100/125/175 that went into a grease filled small cover on the left to step it up to the main change shaft. Anyway--no need for me to tell you eh, you're there doing it now!!, i just have a soft spot for these old girls. [DT125EA over here in nz]. Put a 175 top end on & wheely off into the distance. Good luck. ps, the charging system causes quite an electrical drag [electric brake effect] while it's charging. Always was going to put a switch on the bars to break the charging circuit & double the horsepower when required [passing mates etc]. 12 volt battery would go for ages if only kick started, then flick the switch for the cruise home from trail riding to charge up battery. Cheers.
