Clutch diode

**JerryHawk250** · 11-12-2016, 07:37 PM

Where is the clutch diode located on the hawk? Neutral light comes on when I disengage the clutch. I believe the clutch diode is bad.

darmst6829 · 11-12-2016, 09:37 PM

I would be looking for a problem switch not a diode.

**JerryHawk250** · 11-12-2016, 09:47 PM

Quote:

Originally Posted by darmst6829

I would be looking for a problem switch not a diode.

It's not the switch. It's the diode. I just can't locate it.

Bruce's · 11-13-2016, 08:25 AM

Never heard of a clutch diode before ,can you tell us how you came to this conclusion ? .The only diodes common on a bike are in the rectifier and the turn signal circuit .The neutral light circuit typically consists of a switch and a bulb ,with the switch being located around the countershaft sprocket area of the bike .Often the wires get pinched under the engine cover .I can think of no reason to have a diode in the circuit unless the idiot light does multi functions .

**JerryHawk250** · 11-13-2016, 08:44 AM

Quote:

Originally Posted by Bruce's

Never heard of a clutch diode before ,can you tell us how you came to this conclusion ? .The only diodes common on a bike are in the rectifier and the turn signal circuit .The neutral light circuit typically consists of a switch and a bulb ,with the switch being located around the countershaft sprocket area of the bike .Often the wires get pinched under the engine cover .I can think of no reason to have a diode in the circuit unless the idiot light does multi functions .

The clutch safety switch is tied to the neutral safety switch. The diode only allows current to run one direction. If the diode fails it will allow current to run both ways. So now when the lever is pulled the neutral light will come on. This was common on older Hondas. There is one on there some where. Just not sure if it is hard wired in there or a plug in diode like on a Honda shadow. The Zongshen rx3 has a clutch diode according wiring diagram.

Merlin · 11-13-2016, 09:59 AM

Quote:

Originally Posted by JerryHawk250

The clutch safety switch is tied to the neutral safety switch. The diode only allows current to run one direction. If the diode fails it will allow current to run both ways. So now when the lever is pulled the neutral light will come on. This was common on older Hondas. There is one on there some where. Just not sure if it is hard wired in there or a plug in diode like on a Honda shadow. The Zongshen rx3 has a clutch diode according wiring diagram.

Iam not sure if my Blaze is the same but seeing how no one else is stepping up mine is under the gas tank by the rear of the tank on the left side soldered not plugged and taped up in the main wiring harness. You might be able to find the diode by squeezing the harness. Good luck.

Ariel Red Hunter · 11-13-2016, 10:13 AM

Quote:

Originally Posted by JerryHawk250

The clutch safety switch is tied to the neutral safety switch. The diode only allows current to run one direction. If the diode fails it will allow current to run both ways. So now when the lever is pulled the neutral light will come on. This was common on older Hondas. There is one on there some where. Just not sure if it is hard wired in there or a plug in diode like on a Honda shadow. The Zongshen rx3 has a clutch diode according wiring diagram.

NOW this all makes sense. Thank you for the explanation. I was wondering why anyone would use a diode in a clutch safety switch arrangement, and now, thanks to you, I know.

**JerryHawk250** · 11-13-2016, 10:38 AM

Quote:

Originally Posted by Merlin

Iam not sure if my Blaze is the same but seeing how no one else is stepping up mine is under the gas tank on the left side soldered not plugged and taped up in the main wiring harness. You might be able to find the diode by squeezing the harness. Good luck.

I went out this morning and traced it down. It was taped up in the harness under the tank. Mine plugged in but if you take the cap off it it had a diode in it that was burnt in two. I pulled a diode off an old motherboard i had laying around and solder it in. Everything is working. Thanks Merlin but beat you to it lol

**JerryHawk250** · 11-14-2016, 04:17 PM

After I put everything back together I went out a took a little 78 mile ride and still working.

I forgot to mention that the clutch diode had stop working after I had replace the sending unit on the gas tank. The one that came on the bike had stop working the 1st trip I had made with the bike. I may have smashed a wire or something in the process that may have shorted the diode. who knows? Good news is now I have a working fuel gauge and I'm not guessing if I have it in neutral or not before I release the clutch.

Weldangrind · 11-15-2016, 12:07 AM

Thanks for the explanation. My Lifan has a diode and I wasn't sure what it was for, so I left it there. Glad I did.

**JerryHawk250** · 11-15-2016, 08:11 AM

Quote:

Originally Posted by Weldangrind

Thanks for the explanation. My Lifan has a diode and I wasn't sure what it was for, so I left it there. Glad I did.

Well the wiring diagram that's in the Hawk owners manual is useless. The diode is drawn in but not labeled. It's a good thing I know electronics and knew what the symbol meant. I have built and repaired many computers in my life time. I'm still waiting to hear back from RPS. I don't think they know where or what it is. lol

Weldangrind · 11-15-2016, 11:18 AM

The diode on my bike is found in the harness behind the headlight, IIRC. I figured it had something to do with residual energy after shutting the bike off, but I never bothered to trace it. Like you, I pirated two diodes from an old PCB to enable the LED turn signal on my TW200, because I'm way too cheap to actually go buy some.

**JerryHawk250** · 11-17-2016, 02:01 PM

Update: APSCUSA has come through again.

New Clutch diode has been sent out. I'll have a back up in case it happens again.

11-12-2016, 07:37 PM	#1
JerryHawk250 Moderator Join Date: Oct 2016 Location: Houma, La. Posts: 11,554	Clutch diode Where is the clutch diode located on the hawk? Neutral light comes on when I disengage the clutch. I believe the clutch diode is bad. __________________ 2023 Lifan Lycan 250 Chopper 2023 Venom Evader 2022 Lifan KPX250 2020 Kawasaki Vulcan S 2004 Honda ST 1300 2016 Black Hawk 250 (sold) Keihin PE30 carb,125 main,38 slow.Pod filter,ported & decked head 10:1 CR,Direct Ignition Coil,15/40Sprockets,NGK DPR8EIX-9,De-Cat,Dual Oil Cooler,Digital Cluster 2016 Cazador180 XL 2014 Coolster150 JerryHawk250.com My YouTube Channel Last edited by JerryHawk250; 11-12-2016 at 09:06 PM.
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11-14-2016, 04:17 PM	#9
JerryHawk250 Moderator Join Date: Oct 2016 Location: Houma, La. Posts: 11,554	Update After I put everything back together I went out a took a little 78 mile ride and still working. I forgot to mention that the clutch diode had stop working after I had replace the sending unit on the gas tank. The one that came on the bike had stop working the 1st trip I had made with the bike. I may have smashed a wire or something in the process that may have shorted the diode. who knows? Good news is now I have a working fuel gauge and I'm not guessing if I have it in neutral or not before I release the clutch. __________________ 2023 Lifan Lycan 250 Chopper 2023 Venom Evader 2022 Lifan KPX250 2020 Kawasaki Vulcan S 2004 Honda ST 1300 2016 Black Hawk 250 (sold) Keihin PE30 carb,125 main,38 slow.Pod filter,ported & decked head 10:1 CR,Direct Ignition Coil,15/40Sprockets,NGK DPR8EIX-9,De-Cat,Dual Oil Cooler,Digital Cluster 2016 Cazador180 XL 2014 Coolster150 JerryHawk250.com My YouTube Channel
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11-15-2016, 12:07 AM	#10
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	Thanks for the explanation. My Lifan has a diode and I wasn't sure what it was for, so I left it there. Glad I did. __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
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11-15-2016, 11:18 AM	#12
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	The diode on my bike is found in the harness behind the headlight, IIRC. I figured it had something to do with residual energy after shutting the bike off, but I never bothered to trace it. Like you, I pirated two diodes from an old PCB to enable the LED turn signal on my TW200, because I'm way too cheap to actually go buy some. __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
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11-17-2016, 02:01 PM	#13
JerryHawk250 Moderator Join Date: Oct 2016 Location: Houma, La. Posts: 11,554	Update: APSCUSA has come through again. New Clutch diode has been sent out. I'll have a back up in case it happens again. __________________ 2023 Lifan Lycan 250 Chopper 2023 Venom Evader 2022 Lifan KPX250 2020 Kawasaki Vulcan S 2004 Honda ST 1300 2016 Black Hawk 250 (sold) Keihin PE30 carb,125 main,38 slow.Pod filter,ported & decked head 10:1 CR,Direct Ignition Coil,15/40Sprockets,NGK DPR8EIX-9,De-Cat,Dual Oil Cooler,Digital Cluster 2016 Cazador180 XL 2014 Coolster150 JerryHawk250.com My YouTube Channel
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11-12-2016, 09:37 PM	#2
darmst6829 Join Date: May 2016 Location: Redmond WA Posts: 42	I would be looking for a problem switch not a diode.
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11-13-2016, 08:25 AM	#4
Bruce's Join Date: Apr 2015 Location: Sudbury ,Ontario Posts: 855	Never heard of a clutch diode before ,can you tell us how you came to this conclusion ? .The only diodes common on a bike are in the rectifier and the turn signal circuit .The neutral light circuit typically consists of a switch and a bulb ,with the switch being located around the countershaft sprocket area of the bike .Often the wires get pinched under the engine cover .I can think of no reason to have a diode in the circuit unless the idiot light does multi functions .
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