Be sure the flywheels go back on the same side they came from due to the offset weight being on opposite sides. There are some NOS parts around but usually at prices for the wealthy. Also be aware of India parts being sold in LP boxes. I wont tackle that subject publicly but if you want to know who and what then send a PM. There are zero quality issues with most India parts that are made in actual factories. Pistons, rings, bearings, valves , fuel injection are all good stuff.
I'm not trying to alter your direction or pull a sales pitch for my parts business, just adding knowledge for you.