750 TSCC Rebuild or Replace?

[Rich82GS750TZ]

See Destroy-Rebuild part Deux of this GS750 where I tackle a broken valve and valve-seal replacement:

https://www.thegsresources.com/_forum/forum/technical-forums/-4-cylinder-engine-drivetrain-clutch/1731205-valve-stem-seals-or-maybe-throw-in-the-towel

Copy of Signature.
Rich
1982 GS 750TZ
2015 Triumph Tiger 1200
BikeCliff's / Charging System Sorted / Posting Pics
Destroy-Rebuild 750T/ Destroy-Rebuild part deux

[93Bandit]

Looks awesome! Quick turn around for sure, now get out there any enjoy the bike!

[Rich82GS750TZ]

Thanks Norm, Scott, Dave, Big T, Ed, rphillips, Bob, Glen, et.al. It means a lot. It really is a testament to this great site, and more so, the great folks who contribute.

[dorkburger]

Rich, I think I said before, but in case I didn't congrats. Your journey is a great example of how wonderful this site is when a fellow member is in need of help. And untimely, don't be afraid to pat yourself on the back. After all YOU were the one turning the wrenches.

[Baatfam]

Honestly, there aren't too many things more satisfying than hearing a motor start, after doing major work.

[rphillips]

Dang, ain't it amazing how much you've learned since March 23? Knowledge you'll be proud of forever. Job well done, well except for the little cable bracket you made. Congrats.

[Rich82GS750TZ]

Yes it does, Scott. It really does.

[cowboyup3371]

Congratulations on getting it back to a fully operational status; it sure feels good doesn't it?

[Rich82GS750TZ]

Thanks Rob. I had a shop put that rack on for me years ago when the boys were little and I worried about them falling off. I didn’t discover until a few years later that they not only kept (tossed?) the original grab bar, but also ground off the forward mounting brackets for said grab bar. Since then, I’ve replaced just about everything that needed replaced. If I ever find another grab bar, I have a buddy that can weld up new brackets for me. The bear cub is carries my lunch, some tools, and rain gear.

[Rob S.]

I regret to inform you that something has attached itself to the rear of your motorcycle. Is a bear cub hibernating in there, or is that the fabled child transport/rear spoiler?

Dude. I mean, dude. That's Twin Swirl Combustion Chamber, not shaft drive.

It looks like it's quick release, which is good. Luggage rack looks bolted on, so you'll need a hammer.

Seriously, great job in turning a disaster around.

[Grimly]

Excellent. It's really satisfying when it works.

[Baatfam]

Awesome...Nice work.

[Rich82GS750TZ]

Pained the frame? A double entendre if I ever saw one

See, nothing to a simple top end refresh

Did it give you a chance to buy new tools?

er...Freudian Slip? Anywho, “nothing” to you and a lot of others, I’m sure. Kind of a big deal for me. I consider myself moderately handy, but a mechanic, I am (was?) not.

Tools I bought due to my idiocy that caused this calamity (that I can recall without reference it my eBay and Amazon orders:

Impact screwdriver. The type you hit with a hammer. (don’t know why I never bought one before, WOW!)
67mm cylinder hone brush.
Piston ring spreader.
Terminal Crimper from Vintage Connections (used once still practicing).
Soldering Iron. (used once still practicing).
and a whole bunch of scotchbrite pads and WD-40 for cleaning gasket surfaces. Should have added up the hours I spent doing THAT!

[Big T]

Pained the frame? A double entendre if I ever saw one

See, nothing to a simple top end refresh

Did it give you a chance to buy new tools?

[Rich82GS750TZ]

I am very Happy to report I now have a bike that I believe is better than it has been in at least 30 years. I’ve owned it for the last 15. It has never run nor looked so good.

Big thanks to all who helped me with this (for me) Huge project. I had never actually seen a real live piston before. Much of it was daunting. You all really helped me through it.



To recap: on March 23 I destroyed my engine, or at least half of the rockers in the head, due to me routing a new clutch cable incorrectly and interfering with the throttle linkage. Afraid of what I’d find tearing down that engine, I was able to source a nearly identical mileage engine from fantastic forum member Storm64 (Norm).

I cleaned that engine, honed the cylinders, installed pistons and rings from original motor because they were in better shape. New gaskets all around. Painted the frame, reinstalled the engine.

While I was at it, installed an AGM battery and cleaned every electrical connection.

A few loose ends: still waiting on triumph connectors for the SH775 that I had previously installed. Will redo all the connections around Stator/RR/battery/fuse box. Not because mine are bad, but because with the right connectors and tools, I can now make them better.

Have also been waiting for 3 weeks for a partsoutlaw order for new choke and throttle cables, and new Cush drive wedges.

I still may completely tear down the original engine and rebuild it and make it really pretty. So thinking vapor blast everything maybe. Paint. We’ll see.