'Twas not my innovation but I appreciate good ideas anywhere I find them and make an effort to share with others.
I totally understand being tired after work. I'm 59 and no spring chicken. If you order a cover they take about ten minutes to install and permit ya to work on the control circuit at leisure. If contacts look crispy you can attend to that another day. The one I bought recently was $14.89 with free shipping so don't pay too much.
Since you may not feel like doing a bunch of searching this may help. The info is fresh in my mind because I just assembled one starter of a bad Sporty starter and a free customer takeoff big twin starter. Shops in the US can't compete in man hours with new standard starters and the gaskets and labor to do it twice if you have a comeback is the main reason for replacing complete starters. I have "cash register eyes" and none of these parts listed are high.
Image search:
Pyramid Push Button Starter Solenoid Cover Harley Big Twins Evo TC #17758
They are widely available and both parts are cast, fit as they should, and not being stamped steel will pit more slowly over time. I have other covers including a nice Spyke (got off a used starter paid 15 bucks for or I wouldn't bother. Spyke are very nicely made but I wouldn't pay new price for one.) and any work well enough because there's nothing to screw up.
I don't care for the looks of the stock cover screws so I found the size (I believe it was on this forum) and bought a bag of stainless
M4-0.7 x 12 stainless socket head screws via Ebay.
Stainless in quantity is often cheaper or very close to local hardware store prices plus I get to keep the extras as bench stock. I use divided plastic tackle boxes from Walmart for small hardware and electrical connector/parts stowage.
https://www.flambeauoutdoors.com/FIs...s/Tuff-Tainers shows the style but the other containers they stock work well too. I place a sheet of typing paper under the lid to list contents. The time saving is more than worth it.
Some info on starter contact kits:
This is the comprehensive Standard Motor Products kit. It's listed for motorcycles but automobile kits with
same shape contacts will work as well. Note all the hardware in the photo and
the different contacts. Contacts vary by the position of the terminal holes in the starter which vary by the angle the engine designer places the starter. Other kits like this are available so you can play matchup using the photo. Your local auto starter rebuilder can get them easily if you need to go that route.
https://www.amazon.com/Standard-Moto.../dp/B0041CC0ME
Make sure the new contacts sit level and evenly when tightening the stud nuts. I hold 'em in place with my thumb and torque slowly. They need very little torque to stay put.
I prefer SIX point sockets for soft, shallow nuts and these sit in the plastic "cups" provided so you'll want all the engagement you can get. I ground the end flat to get rid of the chamfer (which is a manufacturing aid not necessary to using a socket, it locates the broach which cuts the internal flats) for better engagement but that's not strictly necessary.
Of course all Denso parts are metric but 9/16" gets nearly all 14mm fasteners and 1/2" gets 13mm. That covers typical connector stud nuts.
You want a tube of this stuff for many motorcycle and other electronic system uses. It's available at most auto stores. I coat my starter terminal threads to prevent corrosion and wipe a dab on the exposed parts after connecting battery cables. I also use it inside connector plugs and blade or bullet electrical connectorswhich makes them MUCH easier to disconnect and keeps out moisture. It's the "spark plug grease" sold in small packets for application inside spark plug boots to prevent moisture and carbon tracking.
https://www.amazon.com/Permatex-2205.../dp/B000AL8VD2
If you choose to remove the starter to swap contacts (less fiddly but adds primary cover R&I and clutch adjustment etc) you'll need a primary cover gasket kit. James Gaskets
34955-75K is listed for your year. Google the part number for best prices. The Cometic kit is fine too but costs a bit more.
In a pinch (for example if you must wait a long time for parts to ship due to not living in CONUS), typical heavy gray gasket paper or similar cardboard (it's not a high heat location) can be traced using the cover as a template then cut to make a primary cover gasket. Annoying to do but cheap and quick, and you can always install a new one later.
If you've any O-rings to replace I like to caliper the old ones (or even better, new ones) so I can order much less expensive Viton or nitrile rings by the bag online. Your Harley engine O-rings will be SAE spec (not metric) so I measure and convert to fractions then play matchup online.
BTW you mention "testing" your relay. Testing proves they function mechanically and that the solenoid portion of the relay works. It does NOT test how many AMPS the relay will pass. They are common Bosch style relays used in hundreds of millions of vehicles. You can take yours to an auto store and ask for a heavy duty 30A or larger relay. The pinout should be on the bottom of the relay (cast into the plastic) or marked on the side of the cap. If you pop the cap off your original relay you can observe the contacts with a magnifying glass and bright light. You'll see how they wear.
I would replace your relay because it's old even if it works.
To see if it's the relay, you can jump the connection between the female which gets hot when your starter button is pressed and the starter control lead from the socket to starter at the socket with relay removed. With everything else working correctly your starter will function as designed. Simple jumper is a short piece of wire. Cool guy jumper is two male blade connectors and a pushbutton switch. I just use a piece of wire. If joy, it was the relay but I'd replace the relay anyway as previously noted.
If looking up parts via a wholesaler or auto store unfamiliar with motorcycles. the starter is a
Denso OSGR Light Duty. Harley-specific parts are minimal.
The output shaft, end housing (where it bolts to the engine) and clutch rotation direction are HD specific. That means you can swap them to an otherwise matching car starter. Other makers produce them since the patents have probably expired but that's the OEM. Japanese auto dealers may have parts in stock. You have more supply otions than with any other motorcycle starter design.
I hope I saved you some time. Don't forget to post what solved your problem to help the next person.