ninjette.org - View Single Post - The classic issue - Bike wont start

DannoXYZ · March 9th, 2018, 05:49 PM

Yes, those are diodes underneath the metal strips. And they tested fine if you have power on one side and not the other. Being solid state electronics, they rarely go bad. I have never, ever heard of one going bad in a Ninja 250 on its entire production run from 1986 to now. Never heard of one going bad on any other bikes either; that's millions and millions of bikes! And I've been riding 35-years. They don't go bad on any other automotive applications either, except for overdriving too-small alternators.

How Diodes Work
https://en.wikipedia.org/wiki/Diode
https://www.electrical4u.com/diode-w...types-of-diode

You're on the right track in that you've narrowed it down to the interlock circuits. Now you should just work out the AND/OR logic of which of the ignition, kickstand, neutral, kill, clutch or start-switch is causing you problems. In programming, there's a table known as a finite-state-machine that lists all possible states of a circuit based upon the inputs. Make a table like that with ON/OFF states of ignition, kickstand, neutral, kill, clutch and start-switch and the corresponding states of voltage at starter-relay and it'll point you in the right direction...

... or you just test the switches...

March 9th, 2018, 05:49 PM	#10
DannoXYZ ninjette.org certified postwhore Name: AKA JacRyann Location: Mesa, AZ Join Date: Dec 2011 Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C Posts: A lot. MOTY - 2018, MOTM - Nov '17	Yes, those are diodes underneath the metal strips. And they tested fine if you have power on one side and not the other. Being solid state electronics, they rarely go bad. I have never, ever heard of one going bad in a Ninja 250 on its entire production run from 1986 to now. Never heard of one going bad on any other bikes either; that's millions and millions of bikes! And I've been riding 35-years. They don't go bad on any other automotive applications either, except for overdriving too-small alternators. How Diodes Work https://en.wikipedia.org/wiki/Diode https://www.electrical4u.com/diode-w...types-of-diode You're on the right track in that you've narrowed it down to the interlock circuits. Now you should just work out the AND/OR logic of which of the ignition, kickstand, neutral, kill, clutch or start-switch is causing you problems. In programming, there's a table known as a finite-state-machine that lists all possible states of a circuit based upon the inputs. Make a table like that with ON/OFF states of ignition, kickstand, neutral, kill, clutch and start-switch and the corresponding states of voltage at starter-relay and it'll point you in the right direction... ... or you just test the switches... Last futzed with by DannoXYZ; March 22nd, 2018 at 05:51 PM.