It may not be that hard, I have done it on mine. However I was a Suzuki mechanic in the late 1970's, GT185 2 minutes to replace the plugs, 10 minutes to remove clean and replace air filter. GS1000, tappet shims removable with depressor, V Strom you have to remove the cam. Progress?????????? Don't get me wrong I far prefer to ride new bikes to the old ones.