He used to drop into my chambers once in a while to smoke, and was first-rate company. When I gave a dinner there was generally a cover laid for him. I liked the man for his own sake, and even had he promised to turn out a celebrity it would have had no weight with me.
The owners manual on every vehicle should state how often the manufacturer recommends that you tune up cars, but as a general rule it is every two years or 30,000 miles, whichever comes first. Driving under extreme temperature and weather conditions will make parts wear out faster, however.
Many shops say that after 30 days you should get the new bike tuned up. The shifter and brake cables stretch, spokes loosen and some parts may rattle loose. Basically, when your braking power fades and/or your bike won't shift smoothly anymore, it's time.