Application: motorcycles， ATVs and dirtbikes， all 4 stroke or 2 stroke gas engine.100% Brand New Hour Meter Tachometer Yz 250 Raptor Yfm Wr Wrf Dirt BikLarge LCD Display Tachometer/Hour MeterGreat for Cart Engines operating in the 25，000+ RPM range，Outboads， Quads， Jetskis， Motorcycles and Dirt BikesResetable to Zero HoursFor all spark ignition enginesSplash ProofEasy Install: Wrap black wire around sparkplug wire - will work on most engines. Some engines will require hooking up the white ground wire.This hour meter reads up to 10000 hours and then resets to Zero The tachometer reads to 99，999 RPM Programable Maintenance hour setting with Service Icon， a reminder when to change oil or other service Works on all spark ignition engines by selecting engine type using S1 and S2 buttons SpecificationsDisplay: Large 3/8 inch LCD displayReading: 9999.59 hours/minutes Reading: 99，999 RPM Accuracy: 1 minute or 10 RPM， Quartz Lead Wires: 5 1/2 feet， plenty to work. Includes single shielded wire with two internal leads. One is to be wrapped around a spark plug wire and the other is a ground wire.Voltage Supply: Self Powered with internal battery rated for 35，000 hour of operationTemperature Range: -4 to 158 Fahrenheit; -20C to 70CDimensions: Main Body is 1 15/16" wide x 1 3/4" high; Overall width， flange to flange， is 2 7/8"， Height is 3/4" from flat surface