Start Relay Test -
Hey Evoyles - As mentioned earlier, the "Neutral Safety Diode" is pretty tough and normally does not fail - unless something in it's circuit path has caused an excessive amount of current to pass through it. I suspect that you will find that the winding or energizing coil of wire inside your "Starter Relay" has shorted and caused the Diode to melt.
As a precaution - Before installing the new Diode into it's socket - You should Test the Operation of the Starter Relay to verify it is not the root cause of the melted Diode.
This is called a "Bump Test" because you only want to "very briefly" bump the starter over to see if the starter relay itself 'Can Energize'.
1 Turn the Key to "ON"
2 Pull "IN" the handlebar Clutch Lever to close the Clutch Switch
3 BUMP the Start Button - to test the Start Relay
4 The Starter Relay Should Energize (close) for just a moment
5 The Starter should "BUMP" the motor over
If the Starter Relay is inoperative - they are simple to replace. One word of caution though - the Chinese Knock -Off Relays are notorious for having a short life and failing. Get an Honda Part for reliability - even a used OEM Honda Start Relay on Ebay is better than the Chinese part that can leave you stranded somewhere.
Good Luck - Michael
Last edited by JK McDonald; 12-04-2019 at 10:26 AM.