OEM gas shocks

concours

concours

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I remember when I had the 1977 T140SJ, I learned the rear shocks were gas charged, and meant to have the reservoir end up, the spring/piston end down.


It just came to mind, as I took a Y-junction at 50mph, the swale between the roads caused the suspension to travel, it fealt like NO damping.
Bike has only done 7200 miles.

Did the T160 have the gas shocks?
OEM gas shocks
 
Shit.

Any trademark of a savage. I know the shop it was restored.

Thank you for noticing that.
 
L.A.B. said:
Note that the T160 through 'bolts' are stepped and are only 3/8" where they pass through the disc but are 7/16" where they pass through the sprocket and hub.

Rear hub bolt 3/8unf x 5.75ins

Rear hub bolt 3/8unf x 5.75ins
www.triumph-spares.co.uk www.triumph-spares.co.uk
Click to expand...
Thank you. Looks like the heads were ground to clear the speedo drive.
Hopefully that was my buddy who owned it.
 
9F4F95D9-8311-40CF-9932-E6D4E12C2BDF.jpeg
E4B9D53B-0D8C-4B61-8C6F-A7A81176CC41.jpeg
D1F09F79-6803-4EED-9C03-809E16C78D26.jpeg


And a PISS POOR grinding job, done assembled because the dish of the sprocket limits grinding wheel access.
That had to be my buddy (a former factory trained Mercedes Benz mechanic). 'Cuz Tony wouldn't have done that.
 
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L.A.B. said:
Note that the T160 through 'bolts' are stepped and are only 3/8" where they pass through the disc but are 7/16" where they pass through the sprocket and hub.

Rear hub bolt 3/8unf x 5.75ins

Rear hub bolt 3/8unf x 5.75ins
www.triumph-spares.co.uk www.triumph-spares.co.uk
Click to expand...
The image at that website show a special long shank bolt, but I can't see a reduced shoulder. Is it just the THREADS reduced?

Not challenging your knowledge here, just want to FULLY understand what has happened.

I guess I'll see when I rip it apart. But I like to have new parts on-hand, to limit the down time.
 
The ground off "bolt heads" look like a nut on a stud🧐
9EF03CD8-1AD8-4005-92DB-3E6392693BFA.jpeg


As do these listed for sale by Baxter's. No doubt, easier to produce low quantities.
8BE58E23-0E73-4D4D-BE0D-94FC628EF70A.jpeg



A mutual friend remembers this bike being a victim of having a 16" hawg wheel on it when the previous owner had it restored.
A lifelong Triumph dealer, with access to all the parts, I'm baffled here.

The speedo drive appears to be in good order, speedo is accurate.
 
concours said:
The ground off "bolt heads" look like a nut on a stud🧐
Click to expand...

Yes, that's how these large bolts were often made.
The rear axle is made the same way.
The 'nuts' however were not available separately although it may be possible to change them.
 
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concours said:
I remember when I had the 1977 T140SJ, I learned the rear shocks were gas charged, and meant to have the reservoir end up, the spring/piston end down.


It just came to mind, as I took a Y-junction at 50mph, the swale between the roads caused the suspension to travel, it fealt like NO damping.
Bike has only done 7200 miles.

Did the T160 have the gas shocks?View attachment 113473
Click to expand...
I had a 1980 t140e with upside down gas shocks
I turned them up the other way and found the damping didn't work
 
L.A.B. said:
OEM gas shocks
Click to expand...
I don't think mine were damaged because I never rode it with them inverted
I popped the spring off of one and worked the damping rod by hand I was surprised to find the shock definitely had damping it's correct way up but none when inverted
 
Touching back on the ground off bolt heads, does anything jump out, like a non-standard spacer, etc.?
OEM gas shocks
OEM gas shocks
OEM gas shocks
 

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concours said:
Touching back on the ground off bolt heads, does anything jump out, like a non-standard spacer, etc.?
Click to expand...

No, I don't think so but the axle would normally fit from the left-hand side.

Note that the T160 chain adjusters are different (the left has a spacer attached to the inside face) but look to be correct as they are.
 
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