First Cafe Racer Mod! 1983 XJ750 Maxim

Are these things chrome plated? (Touching with finger)
It’s badly cracked all over and looks terrible!
Sprayed with aircraft paint remover and nothing happened...

 

The outer two are chrome plated, the inner ones plated with something else (zinc I think). The inner ones are not nearly as visible with the tank mounted.

 

xj4 catalog says polished chrome and natural zinc plate

also golden chrome for midnights

 

still have some of that nickel plate stuff? try it on the zink plate ones.
chacal used to have rechromed ones that looked like they should be in a jewelry store

 

I think I'll Nickel plate them!
I did one of the inner cap, hit it wheel wire wheel, 1200 grit, then polishing wheels and White Diamond Polish like I did for the rear brake cover, I'll go back and hit it with 2000 grit, plate, then polish up again, it'll look REALLY good at that point!
I have a sanding wheel with multiple strips of sand paper on it that seems to work decently with taking it off the chrome, chemical removal seemed too harsh...

Any easy ways to clean up the carb body to make it look nicer??
It would be great if they were also painted black but I feel like that would require breaking the racks again and being a major pain..

 

https://drive.google.com/open?id=0B4j6bf_0WGweZ21LZHFZckJIVzA

 

Are the wires connected to the coils replaceable?
Don’t want to break them while inspecting it...
These spark plugs are odd, easy to pick up at local auto store?

Any recommendations on filling in the holes for the air box from the chrome covers installed by the PO? I have liquid electrical tape at the moment.

 

The chrome covers on the airbox came on the bike standard: https://www.yamahapartshouse.com/oemparts/a/yam/5004238ff8700209bc787a9c/air-cleaner
The plugs, you can get from the local auto-parts store. I'm not 100% sure, but I think the coil wires are not removable from the coil end.

 

They are not "easily" removable but a determined individual can grind out the channel with a dremel or similar tool and epoxy replacement wires in place. Other options are to splice new wires to the old near the coil or simply replace them with good/new coils. There are some threads that state the 81-82 CB750 coils PN 30500-422-013 are a direct replacement but I do not have any experience with that so do your homework.

 

Interesting, they’re just screwed into the box where it appears to be after the filter...

 

Ive seen some mentioning in here but your reply is the most specific!
I was going to change the wires as a maintenance thing but I’ll have to figure out how to test these then...

 

they sell splices for the spark plug wires the splice screws in like the caps then you tighten the compression nut
https://www.ebay.com/itm/NGK-SPARK-PLUG-Wire-Cable-Splice-Connectors-7mm-Wire-/311196846125
xj4ever sells them too

I have used these
https://www.ebay.com/itm/NGK-ALTERN...804194?hash=item1ec0b063a2:g:nuYAAOSwTglYkOxs


nylon screws would fill the holes in the air box or try to fill with abs glue for black abs plumbing pipe

how to do surgery on coils
http://www.xjcd.org/x-wires

 

There’s quite a few models that that specific coil fits, use the partzilla lookup and you can see the cross reference.

 

https://newmotorcycleparts.net/

this is where the coils come from if i remember the original ost about them , you can buy just the coils or a full setup . caps wires coils. they are a direct bolt on.


http://www.newmotorcycleparts.net/electrical/coils.html

 

When installing LED turn signals do I have to use resistors or is there a flasher/ relay??

I think I read each turn signal would need its own resistor.

anyone have experience with certain resistors if some are better than others?

 

resistors are if you want to keep oem flasher. you need to get an led flasher at the autoparts store.
one with adjustable flash rate would be good


using resistors consumes wattage defeating the energy saving leds.

 

But you’re producing your own energy so it’s not really “saving energy”

 

then saving wear and tear on the alternator, increasing gas milage with less drag on alternator or saving wattage for adding accessories with out exceeding amperage rating of main fuse or output of alternator( adding accessories would negate saving alt wear and tear and milage)

 

My main reason for using LED is for visibility and style.
I suppose I just have no idea where a pronged flasher would go, it would be the easiest!

I checked the wiring diagram so this is a guess...
Is this it?!
(4 prongs inside)

or this?

Under the coils