RazeOrion

**UPDATE** I can start the bike with the battery hooked up, and she stays running with the battery disconnected. Tested the battery...

Well the battery holds a charge fine. Wouldn't the battery at least maintain a charge if the charging system was working, even if the...

So, I recently got my 1980 XS400SG running after replacing my spark plug cables and all my fuses. My new problem is that she isn't...

Can't wait to get her road worthy. Plan is to ride until my younger brother gets his license, buys her, and start the process again on a...

Main reason I checked it. We tested from battery to ignition switch, coils to the battery, etc, etc. Finally narrowed down the fuses...

*UPDATE** I got her running! You'll never believe the problem...a bad 10A fuse for my ignition system 😑 In any case, my next course of...

I will definitely give this a look over my weekend. I'm definitely buying a new one anyway, just due to how worn/old the assembly looks...

Thanks for the tips! My younger brother has electrical engineering experence and hes wants some more soldering practice. Time to pass...

I removed the board and took some new photos of the aforementioned potential problem areas. There don't seem to be any burn marks on the...

Thanks for the scan. I'll definitely give them a better look after some sleep

Yeah, most likely. I pulled it roughly 20m before I left for work, so I didn't have time to really break into it. I'll check it out...

Well that would explain my potential electric start issue. But the main issue I have is no spark on kickstart either. I pulled my TCI...

I'll give that a shot next weekend

Primary and secondary ignition coils testing well within their parameters. Battery charged amd putting out at least 11.7 volts. Got my...

Thankfully, the parts are only 4 days away. Also charged up tue battery and got a 12v reading after, so I'm c9nfident I've at least got...

Hey, how's that for coincidence! I'll try getting a reading tomorrow before the party I'm having!

Thanks a ton! Retested everything and the coils are testing at almost exactly 3 Ohms and 8 kOhms respectively! Upon inspecting the...

I got the gas tank off and testing the ignition coils. I'm not sure which is the Primary & Secondary, but they're both testing at 3...

Thanks! I appreciate your help

Can you clarify what a TCI Box is?

New Owner of an old 1980 XS400. Brought her home and I couldn't help but start troubleshooting before work. I replaced the spark plugs...

I absolutely will. I pick her up tomorrow afternoon, and I'm getting her towed home. It's gonna be impossible not to tinker with her...

From what I saw during my initial inspection of the bike, PO installed an Inline Fuel Filter himself. Fuel lines seem old though, so...

I definitely will. I'm on my way to pick up some new fuel line at this very moment haha!