Hi Guys, did anyone ever noticed that the front cylinder exaust sounds very different from the rear cylinder?

Also while adjusting the intake valves clearance , I forgot to take out the sparks and noticed that the compression (when moving the crankshaft) was escaping trough the timing sprocket case is this normal? Should I be able to move the camshaft without removing the plugs? Sorry for these questions. but I'm not used to 4 stroke engines.

There's a theory that when balancing the cyclinders, the front one should run a little hotter than the rear one, as the latter gets less cooling airflow... but it's just a theory. Not something I've ever tried.

Interesting