Honda CB750 K2 - Primary ignition circuit upgrade with new relay Ep. 8
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- เผยแพร่เมื่อ 3 ม.ค. 2021
- On the old Japanese motorcycles the current for the ignition system (coils) runs through both the main ignition switch (key) & also the kill switch - not ideal & will, over time, cause damage to the internal contacts to to arcing etc. So, as part of the ignition system upgrade on this old Honda CB750 we are going to make a number upgrades, & the fitting of an ignition system relay is just one of them....
The video shows a step by step process of installing a relay into the wiring system of the motorcycle together with a detailed explanation of how to wire up the 4 pin relay & the fitting of each of the wires onto the motorcycle.
In the next video we will be fitting the new Dyna Ignition coils!!
Andy
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Andy - ยานยนต์และพาหนะ
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Good video. Exposing the connection in the loom where you had to attach a different colored wire was the professional thing to do. It is so frustrating troubleshooting for the next guy if the change isn't easy to spot. Cheers..
Thanks Connor :-) on a side note.... I ordered your jacket today, thanks for the measurements. Cheers Andy
@@AndyMechanic I saw a video where Tool Girl Holley was wearing your jacket. In my opinion, I am pretty confident that it looks much better on her than it ever will on me. Cheers.
Haha! Now I 100% agree with you on that one Connor :-)
I really like you are showing the complete video! Thanks
i watched the vedio from start to the end it was realy helpful and professional thank you andy
Andy a long video but hell what else can you do during this damn pandemic. Always pick up some new techniques watching any of your videos. Thanks for sharing all your information and hope you stay well and safe Artie 😊
If I ever do another CB750 I will do this upgrade.
Nice work on the connectors. I don't haveva lot of confidence when I do them. I tend to crush them.
I bought a Milwaukee m12 ratchet and it cut my maintenance time by an order of magnitude. I dont trust crimps because of oxidization and corrosion. Even the bad solder joints still intact.
top job . that was some soldering that was lol the crimps for the loom splices are called Crimp U Joint
Thanks Simon....back in the workshop today....fitting the Dyna electronic ignition :-)
Just did this to my gl1000.
Best vids brother
Hey Andy , you've probably already done this ...crimp/tighten all those connectors onto the relay , the main feed red was almost falling off too.
Looking forward to the next bit ..peace and love brother 👍🏻☮❤
Thanks, yes, I took another look after & to be honest the metal on the female spade connectors is a little too thin & not maintaining the clamping force - I'll have to replace them unfortunately....
Well spotted! Cheers Andy
Well I watched the hole video m8
And like you sed it amazing what you find when you start taking look tape off every used bike I have worked on has had sum dodgy wiring on it it's all fun and games
Good morning Brenden, I agree, it's amazing what 'alternative repairs' you find! This bike definitely has more than it's fair share of bodges though! Great for the videos :-)
Have a great day, Cheers Andy
Hi Andy, I just googled the Bosch RE55: It’s an external solid-state electronic voltage regulator for alternators.
Well that's rather odd since the bike has a regulator rectifier fitted?? I need to investigate further. Thanks for the info :-) Cheers Andy
I have a question? I have no kill switch .. How would I do this .. Just skip the black lead to kill switch.. And go straight to the coils?? Any advice would be great.. Thanks cheers keep it up
Yes, that will work just fine :-)
damage to the internal contacts DUE to arcing? to to :)
No link for the connectors?
What size wire is that you're using?
What about doing it with a mosfet?
Hey Andy. I have a 77 gl 1000. If I use the 3 ohm Dana coils in do I need the ballast resistor that’s on the bike. Thx in advance
I'm guessing the bike still runs points?
@@AndyMechanic hey. No electronic ignition
No , it has electronic ignition
Getting famous off of comments day 220, so I can live the dream, live every day like it’s your last!🤙🚀🤙
What kind of ignition relay is that you used? I wanna do this to my bike.
It's just a 4 pin 20 amp standard relay. Just check its rates for continuous use
Cheers Andy
wonder why someone drilled three holes in the frame above the starter solenoid ?
Hi John, yes, Definitely doesn't look standard & something that could cause the bike to fail the NZ Certification so I'll have to weld them up, flat the welds off & paint over. I won't be putting that to camera though! Lol
after market seat belts i bet ? good vid will try your mod on mine when i get to the loom part if the build
Hey Andy. Put the relay in my gl1000 primary circuit. I ran the kill switch wire(18 gauge) back to the relay and to ground as u showed. Then ran a 14gauge wire from battery to relay through relay to the coils with the same size wire (14 gauge). At hard throttle the motorcycle losses all power and turn back on as the rpm drop. Any ideas why?
Hmmmm....There is a voltage induced into the primary coil when the field collapses. This can be up to 200 volts - it may be messing with your relay. Just to test, bypass the relay (connect the circuit feeding the ignition coils directly, taking the relay out of the circuit). Go for a test ride & see if problem goes away...
Let me know
ta
Andy
@@AndyMechanic hey. I’ll try it. Funny thing I ran this bike all day, no issues
@@AndyMechanic hey. I rewatched your #8vid and see that u put the red wire on the starter solenoid and not the battery positive. Would that make a difference?
No, I don't think so. This was just a more convenient place to pick up battery +
Relays secondary circuit (key on power/ground) might need a diode across positive and negative to prevent electrical interference feedback
where can i get the relay
any auto store
andy has some one all so removed the main fuse box ?
Golly, I haven't noticed one on the bike! I'll check the Service Manual to see where it's supposed to be located. Thanks for the heads up :-)
SO sorry i was looking at a k7 fuse box k2 has just one fuse@@AndyMechanic
Phew! That's good news, you had me thinking I may have to fit a new fuse box! Lol
Great video, why didn't you just buy a new $90USD wiring harness? Seems that wiring harness is not only very old, but what's worse is it seems to be butchered.
3 months delay on supply due to shipping & I wanted to modify to fit the ignition relay too so that's what I did :-)
Pleased you enjoy the videos. Cheers for now
Andy
@@AndyMechanic sounds good. Yes I am really enjoying these videos because I am bringing a 1978 Honda CB750K back to life now. It had been sitting in the previous owners garage for over 20 years. The engine was seized from sitting so long. I got it unseized and have been bringing it back to life with help from your videos. I will be doing the electric ignition and the starter relay that you have done. You are meticulous with your work like me. It's nice to see there are still guys out there that truly care about their work. 🤟😁👍
Hey Andy, Like your videos but cannot sit through multiple hour ones like this so do not watch. Perhaps you can look at condensing them into 20-30 minutes? Must be my short attention span.
Hi Steve, sorry, it's difficult to pitch the video length, some viewers prefer the longer, more detailed videos whilst others prefer the shorter, straight to the point type. Personally I prefer the shorter ones as they are easier to produce but sometimes the video needs the detail in order for the viewer to follow/understand the full process.
Definitely shorter videos are on their way....promise!
Cheers for the feedback. Andy
@@AndyMechanic Cheers, Steve. Auckland NZ