[GZ250]

You bye a new bike, if its yours second or third than you will know much about everything. Only difference is that heavier bikes are more complicated and need more attention and more oild and parts need to be checked, replaced or changed.

For GZ250, its the simplest of all. The more you do is your own choice, if you keep it to bare minimum it is equally good. When you complete the 600 miles and take it to dealership what they should do is change oil and filter and check the valves. This is the part that needs time and should cost around $150 or so. If anyone is asking more its not good. I paid the same because I had no idea about what valve adjustment is and I did not want the dealership to say afterwards that I did not have my valves adjusted. After that I never had my vales adjusted because it is going ok and I never hear any sound (15000 miles on 05). I ocassionally use (2-3 times a year) the carb and inhector cleaner with gas. I buy the suzuki brand and use that bottle three times. Do not add all at once becaue its is a lot for 3 g tank (i think). Keep an eye on the oil and lube the chain.

If you have adea about valve adjustment than I would say even the first time you do not need valve adjustment. Some guys on this forum do on their own but I never dared. So be sure the dealership does valve adjustment when they charge for that because its the thing that you can't see and feel (if you are not having any issue).