2008 TRX250ex won’t start

First, you know that the battery is not part of the ignition system? The engine does not need a battery to run. The battery is just to power the lights and electric starter motor.

Power goes to the key switch via the red wire - when the key is turned to the on position, the black wire becomes 12v+ - the black wire goes to the neutral and reverse lights - a green and a light green wire with a red stripe goes to the neutral/reverse switch - when the lg/r wire is grounded the neutral light illuminates - when the green wire is grounded the reverse light illuminiates.

Now the lg/r wire goes to a diode - on the other side of the diode is a light green wire - the lg wire goes to the CDI unit and the starter solenoid - the starter solenoid has no ground until the neutral light is grounded - fix the neutral switch or the wiring to it and it will function as designed again.

The neutral/reverse switch is internal to the engine and the rear cover has to be removed to access it. Yes, first inspect the wiring to it - a short in the wire will simply turn the light on all the time.

bidlatata11 said:

Have not been out to get some starting fluid this morning. Is there a certain brand you recommend buying? Also where should i be spraying it once i do have it?Thanks for the response!

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Welcome to the forum


I use PJ1 PRO CONTACT CLEANER as starting fluid and I spray it into the intake duct while cranking the engine or directly onto the air filter for a longer lasting temporary fuel source - sprayed into the intake duct while cranking will result in the engine dying almost as soon as the fuel source is removed.