Bike is a small thing and a piece of cake if you have been into rebuilds of cars then it would be very easy to get up to speed.
after a year observing mechnics and making timelapse of him assembling.. I was able to rebuild engine from top to bottom (using service manual) with 10/10 specs and that enigne did not needed any repairs untill it crossed 37k on odo..
i did not had any prior exp. of engines and it turned out really good.
u r right about 'sab fankaar' 99.99 'shodh' ustaad just work on engine without any underlying knowldge and do what there ustad told them to do...