Sunday, May 13, 2018

1948 Triumph Tiger 100 Restoration


This 1948 Tiger 100 came my way back in 2004 but sat waiting in the wings for many years awaiting restoration which was eventually started back in 2015.
Here is a shot of the bike after a dry build. A really nice core to work with.
Alignment of the rear subframe looks a bit off. The axle slots happened to be tweaked so the frame was off to Dr John for alignment.
Back in 1948 Frame and Engine Numbers did not match. The Engine number started off with the Model Year, then Model and number. Frames for the Heavyweight Twins were Prefixed T.F. and the Lightweight models T.E. Numbers can be found on the left side of the Headstock.

Hardware prior to Cadmium Plating.
Pure elbow grease brings the Crankcases back to life with several steps involved to get the finish I like.

3 Piece bolt together Crankshaft was already polished, a nice discovery during the Engine disassembly.

The original Babbitt lined Connecting Rods, with help from Leif Lewis they were re-sized to spec. Leif as well as Dan at Franz of Grubb are always part of the team, those 2 know there stuff when it comes to these parts that are now hard to find. Gone are the days of easily replacing parts, now we have to make good what we have.


1948 Was a crossover from the Screw in Breather to the Pipe Breather. This motor had neither! I had to fabricate a pipe and press it in.

Early Triumph Twins all came with BTH Magnetos, some say superior to Lucas.


Speedometer was driven from a Drive bolted to the rear of the Gearbox that ran off the Countershaft Sprocket. This took some hunting down.

Lots of NOS Parts go into a restoration, some on the outside some hidden within the Chaincase. Shown is an old stock Clutch Center.

New Head Races and Ball Bearings, 2 sizes were used on the Rigid Frames.

New Fork Bushings and Felt Seals, These felt seals do actually work.

Wheels are another lengthy process. Rims are stripped and Plated, then the centers get painted and lined. Buchanan's Stainless Steel spokes has the "B" ground off of the Spoke Head, then they were bead-blasted and finaly laced to the Hub/Rim with Chrome plated Nipples.

A choice of the Rigid Rear Wheel or the Sprung Hub was available in 1948 so has this came with the Rigid Wheel that is what I went with. Axles were thinner on this application and Tapered Roller Bearings were employed as standard.

Don't even want to get into the headaches encountered with the Tank restoration. Lets just say it was all done twice or was it 3 times!

The Thrower plate which bolts on under the Sprocket Bolts and covers the gap between the Brake Drum and Anchor Plate on theses early wheels. This was a part that I had to source and proved a challenge, never seen a spare one before then and have not seen one since.

Lovely riders view.
Showing the tidiness of the Rigid Rear Wheel. Note how the Stay Tabs on the Fenders get painted black.

19" Wheels front and rear.
Another hard item to locate was the Lucas MT110 rear Lamp.

On display at the Quail Motorcycle Gathering 2017.

Was great to see this on the lawn of the Quail, a long road was travelled to get this machine to where it is today.

Ended up winning the "Spirit of the Quail award for that year. A very proud moment in my life.


This was the 1st run around the block after completion of the restoration.

1 comment:

  1. Lovely labour of love and sounds good to boot.I have the same year and model awaiting resurrection.

    ReplyDelete