If you ride the motor regular keep an eye on the woodruff key on the camshafts.
They are cut so only half of the raised part is left,the other removed section, is for clearance on the timing plate with the drive pin ,which sets the cam timing.These have a tendency to shear,because of the direct cam to valve position any failure on the key can lift the cam housing from the head casting.I was lucky when mine went ,I was "pulling back" the engine when it sheared.Other than having problems cleaning dirt from the head to change the spark plug it gave me great service for two seasons racing.
Have fun and enjoy it, I still think it was one of the best motors ever.