You should be lubing/cleaning your chain more often than at each oil change. Chain slack needs to be checked/adjusted too. Changing the spark plugs ain't that hard to do on your own either.i was wondering what kind of matenance you guys do on your own bikes.
every other time i add oil i do a full filter oil change and every oil change i grease my chain.
is there anything else im missing
oh and i check my coolant from time to time