We did this on another bike forum and it was fun. The intent is to get out and ride to complete the challenge before someone else does. All you need to do is take a picture of your bike with the challenge item in the background.
The rules here are simple. Be sure to note them before creating the next challenge for the rest of us.
1 - Has to be YOUR motorcycle.
2 - Picture has to be taken after challenge is made.
3 - Challenge is good for 2 weeks, if it is not met, the previous picture poster picks a new challenge.
4 - Nothing illegal to be challenged.
5 - Keep comments to a minimum, if you comment, post the current challenge after your comment. In Bold Italics
6 - No repeat challenges.
7 - All challenges must be of your bike and a landmark, something most people can ride to or find in their area.
8 - No other bikes can be used in a challenge, ie. your bike next to a Ducati. Some exceptions allowed, ie. you bike next to a bike cop.
9 - All challenges can be removed by moderators. At which point the postee of the challenge will be asked to change his current challenge. After being asked once and there is no change or challenger posts another crapy challenge then the prior challenge winner will pick a new one.