Why Honda rancher green light wont come when in netural and wont start2008

Check the manual. Some have an interlock involving holding a brake on, hand brake, foot brake or parking brake. Or ask the local guy?

https://www.google.com/search?q=2005+honda+rancher+400+manual

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Starter solenoid needs a good clean or re-pacing also chek you sater is ok take off and test with battery

Battery, starter, carb or wiring

Hey Leonard,
Take your battery to O'Reilly, Autozone, Advance Auto and get the CCA (Cold Cranking Amps) checked.. this is a load test.. and the only way to get a battery checked to find out if its really good.
Make sure the battery connections are CLEAN and tight.
12+ volts will make the lights work.. but it takes amperage to make the engine starter work!!
Do this and repost/respond on here..

What clicks is the solenoid for the starter. I pushes the starter gear into the flywheel, then the starter motor is supposed to spin the flywheel and it starts. If you hear the click, but nothing else happens, there is a good chance that it is the starter itself. Check the wires going to the starter and make sure that the red one is 12 volts. The black one should go to ground. If it has 12V on it, then it is the starter motor. If it DOESN'T have 12V, then the problem is that power is not getting to the motor.

Hi Howard find thd neutral switch on the left hand side near the sprocket it should be a single wire (light green) earth it to the frame or battery and se if the light comes on. If it dose make sure it's in nethral then try to star it. Regards Jim...

Actually it sounds like the solenoid is working fine. The clicking you are hearing is the solenoid when it's energized by you turning the ignition key and giving it power from the battery. I would trouble shoot the starter. Start by checking if there is 12 volts at the terminal on the starter. If you're getting 12 volts there, your starter needs to be replaced or rebuilt.
Good luck

Check that you have a spark .
The gap may be lost on the flywheel

Disconnect the battery. Take out the air box. The starter is under the air box and is bolted on with three bolts.