An hour meter is an essential part of your maintenance schedule.  It is powered by an internal lithium battery that will last 8 to 10 years.  It is easy to fit within 5 to 10 minutes.  Fix it to the bike with the double sided tape or screws supplied then wrap around the outside of the spark plug wire or coil the external wire that is supplied.  It can be used on any engine with a spark plug lead.  Size is 55mm long x 35mm wide  x 15mm high (thick).