I'm like richC, been working in engines since I was 18. Had an uncle, who would stay over on weekends, and then leave on Monday morning for his second shift job. In the summers, we kids would watch him try to get his car started. We didn't know any better. My dad couldn't afford a car, so we thought all cars needed to be wrenched after a weekend, in order to start. Once he changed his brake linings in the morning and while yanking on a brake cylinder, the cap popped off and I caught a stream of fluid in my face. So I followed in his footsteps, but unlike him, I had better tools, and the shop manuals. I have torque wrenches. Don't need them for bikes.