57.Honda CX500 Cafe Racer- Wiring-Ignition & Charging systems

Honda CX500 Cafe Racer: In this video I start to do the bloody wiring. Like the song says..."Fun fun fun fun...". Using the Honda CX500 factory service manual wiring diagram for the Transistorized Ignition system, and all its errors, I have adapted it to work with the M-unit Blue. Check out the wonders of cutting wire, crimping and soldering connectors, sleeving cables, and deciding...which colour wires go best with my shoes. Checking all specifications, tolerances, oil clearances for excessive wear, before starting rebuild . I will be checking pistons, rings, oil bearings, crank shaft, con rod big end bearings, crank shaft bearings, cam shaft, rockers, rocker shafts, oil pump, clutch, gearbox, and every other part to check against specifications in the factory service manual (FSM). I will be replacing all bearings, oil seal, o rings....you name it, I'll be checking and replacing as required. Please continue to watch as I rebuild this 1982 Honda CX500 engine, documenting the whole process in great detail, and discuss what I plan to do to convert the Honda CX500 form a stock bike to a cafe racer, with a GSXR front end fork conversion and full engine rebuild, spoke wheels, as well as other modifications. This will be a very detailed video series that will show how the Honda CX500 is dismantled then reassembled, and all mechanical aspects of dismantling and rebuilding the Honda CX500 engine will be detailed and documented. I aim to do things like key relocation under seat, relocation of the battery, removal of the air box and rebuilding of the carburetors to include velocity stacks, removal of the H box and replace with straight through exhaust pipes, fitting Motogadget components like the M-Unit Blue, Motogadget Mini, instruments, and a whole range of other mods.The end result should be a unique Honda CX500 Cafe Racer.

[@mateochavez8885]

Great channel! Each of your videos are so helpful - I’m aspiring to accessorize my cafe racer to this degree and wouldn’t be able to do it without your help here!

[@georgeknox]

Thank you, I'm right behind you with my CX500 Cafe Racer. I'm also going MotoG with all of it. one time build done right. I cant wait to here yours run. Cheers from the Northern California

[@Gus-cg9yp]

Hi,well done tidy job. that's a bit of a nightmare, hope backing the souffle is easier...lol thanks . Gus

[@andyperks1878]

Many thanks for this ,its really helping me

[@alanpegg3112]

Great to see you back:) Cracking job as always!! I love wiring, I too made my own harness for my CX, it works out a lot easier than chopping the original. I was lagging behind you in my build, but because of your fowl hot temps where you are(you lucky Bxxxxxxxxd, it freezing here in the UK) I've caught up. Keep up the good work

[@TheOdontologist]

Thanks Alan. Still too hot. Some parts of Australia will reach 45 today. Still can't get a full days work.

[@alanpegg3112]

@@TheOdontologist We can only dream of those temps!!! Its going to be 4-5 degrees here today if we're lucky!!

[@carlosgooglemaps94]

WOW!! Paisano, such a great job, very detailed as usual, one of the very best job on a CX (almost like mine🤣🤣)our models are a bit different, mine does not have sparker units,again; great job!!

[@0tt00tt00tt0]

Hi, great channel. Just acquired my own CX500 and I've been learning a lot about these bikes from your work. Just wondering about the relay you have connecting the neutral light and clutch. Is that a standard relay or did it come with the bike? Curious as to why there are only 2 cables coming out of it? I also have the same m.unit setup, but not that there yet with wiring it up. Thanks

[@PaulFitzgeraldMusic]

great vid.. Can you confirm if that MOSFET reg is genuine? seem to get a lot of phonies. Also what size wire is needed for battery to ground connection? cant seem to find anything - just 6mm2 needed for positive side. cheers!

[@TheOdontologist]

Same for negative would be a wise choice. As far as reg/rec...I genuinely purchased it. How would one know if it is genuine? And what does genuine really mean? So I can't answer your question.

[@jompaswilliamson3438]

Is it possible to get that nice picture in the beginning for print so i can have it in my garage beside the build?

[@albertkamminga5647]

What’s up with the welding?

[@niche.photography5832]

maybe you have an answer for me not sure 1980 gs450L it appears to have a cdi not sure if its the same as cx500 would you happen to know if the m unit blue wiring would work ?

[@TheOdontologist]

M unite will work with any ignition system. Some rewiring will be needed for peripheral items like turn signals etc, and kill switch will be disabled. Revival Cycles has a good video on wiring up an M unit.

[@Yellowfootprints2011]

Your channel is great and has helped me so much!! I'm trying to figure out the ignition wiring part right now (my last part of wiring) but I have an ignitech. I see you have the neutral wire split - one to the neutral switch, the other to the clutch switch, connecting both to the relay. Is there a way to do it without a relay? Would I just connect the wire from the 4th pin of the solenoid to the neutral switch and clutch switch? Thanks so much!

[@TheOdontologist]

Hi Stephanie and thanks for comments. If you're referring to a solenoid switch on the the ignitech, I'm afraid I can't help. I have no experience with the CDI versions of the bike and how the Ignitech relates to them. My CX is a transistorized ignition machine. The clutch neutral circuit is the same on both though, so if both wires pass throught the same switch it should work. Cheers.

[@Yellowfootprints2011]

@@TheOdontologist Thanks so much, and I appreciate your help!

[@EnatorV87]

Excellent channel. I have a Honda CX500 of the year 79. The CDI does not work anymore. How can I buy this ignition system? Can you guide me?

[@TheOdontologist]

Thanks EnatorV. This ignition won't work on your bike. You will need an Ignitech, which uses your old stator, but better is to buy a Rae San ignition that relaces all your 40 year old components. Have a look at this site www.rae-san.com/products/cx-500-cdi-ignitions/

[@EnatorV87]

@@TheOdontologist thanks for your answer. I will see this site right now!

[@arnoldo24]

Awesome video! It helps a lot. Can’t wait to see your bike when is complete. Can I ask if you put a electrical fan or you still using the mechanical one? If is an electric fan would you mind sharing with us how is wire? Looking forward to seeing more of your videos. Thank you

[@TheOdontologist]

See video #45 for electric fan install. Wiring coming soon.

[@arnoldo24]

The Odontologist That’s a great video, I was hoping you show how did you wired it to the m unit. Do you have any suggestions on how to wire it up? Any comments would help. Thanks

[@chrisdavie4660]

Great video, learning a lot watching these.... Your under engine battery box; can these be bought as mine is a very poor DIY effort.. Thanks. Chris

[@TheOdontologist]

I bought it from CRK in the UK, but there are others that make them.

[@kingyair]

hey can i ask where you got the front bracket mount for the seat?? I am trying to find something like that for mine. custom made?

[@TheOdontologist]

It came with the seat I bought. Just an S shape...wouldn't be hard to make.

[@alejandromichel4876]

a question my cx does not want to enlighten before I did but I leave and ask the neutral light does not turn on could be the the neutral point sensor?

[@TheOdontologist]

Could be sensor....but if all warning lights out maybe dead battery?

[@TheOdontologist]

....or main fuse.

[@richienicholls2988]

Nice job on the video you have put a green red wire from the solenoid for the neutral light , I was wondering witch pin you came off with this wire as I have a similar solenoid but all the four pins are taken up with 1red wire going to m unit,2 red wire going to regulator ,blue wire going to start on moto gadget unit and black to earth so no space for the red green wire. Your help would be very appreciated thanks richard

[@TheOdontologist]

Why 2 red wires to regulator ? Are they twins? Only need one I think. But I'm not a guru....just a hack playing with a toy. So don't take my word for it.

[@richienicholls2988]

Sorry ment from the 4 pin plug there is 1st red wire to m unit 2nd red wire to the reg 3rd blue wire to start 4th black wire to earth You mentioned on your video that you brought a green and red wire out of the 4 pin plug to keep the same colour as the original honda wire diagram I was wondering what pin you come off. Red and green cable is for clutch switch so engine won't start with out clutch engaged and also neutral light

[@TheOdontologist]

@@richienicholls2988 ...have a look at wiring diagram at start of video. No earth.

[@richienicholls2988]

@@TheOdontologist hi there On the next video 58 there seems to be an earth coming out of the solenoid on the electrical diagram at the start of the video Thanks Richard

[@TheOdontologist]

@@richienicholls2988 ...oops...mistake. no earth should go there.

[@rustynutrestoration2170]

Hi mate what regulator do you use ?

[@TheOdontologist]

12 v MOSFET....www.sparckmoto.com/Content/images/products/103/1.jpg