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.

Sunday, January 31, 2016

1962 Triumph Bonneville Restoration.

1962 Was the final year of the Pre Unit 650's, many significant changes were made for the '63 Season all of which paved the way for the next 2 decades of production. My passion is with Pre Unit construction machines and the '62 Bonnie was a fine example of the iconic T120. Here is a blog centered around a bike I restored in 2014 that now sits in the prestige collection of an important client of mine.
Pictured below is the bike how I purchased it back in 2013, still with many original parts and in running condition (despite a broken Crankshaft, see below). Click on the images for supersized versions.
Fitted with an Alfin custom Alloy Cylinder otherwise all as standard with the original Amal 376 Monobloc Carbs,
After chemical stripping the sheet metal was in excellent condition. The front blade was supplied by Pre Unit specialists Ace Classics as the one that came fitted was a custom aftermarket type
The Drive end of the Crankshaft was broke in two and was clamped together with a stud, amazingly it did hold together until teardown for restoration.
Replacement Crank was reground and then dynamically balanced
My least favorite job on a Triumph is removing and replacing the Swing Arm Spindle. After years of neglect rarely ever seeing a squirt of grease these are more often than not a real pain to remove. Anyway, new bushing were fitted as was a new Spindle.
The Alfin Cylinder was replaced by a stcok one and bored .040. Boring and Cylinder Head work was performed by Dan over at Franz and Grubb in North Hollywood.
A new High Gear bush is almost always required during any Gearbox overall.
New Shock Absorber Rubbers fitted to the Clutch Center.
A few shots during the rebuild.
Original Dunlop Rims were re-plated. The Dunlop stampings survived the process nicely.
Pre Units from 1960 to 1962 came in a Duplex Frame
 A neat assortment of finishes can be seen on a restored a bike. Chrome, polished Alloy, Cadmium Plating and so on.
 1962 Bonneville's had a unique Oil Tank mounting set up which rubber mounted the Tank at every point.
 I was able to reuse both the Lucas Horn and Rectifiers. A new old stock Harness was fitted.
376 Amals were refurbished.
Petrol Taps introduced for the 1962 models were stripped for Nickel and Chrome.
 And finally enjoy pictures of the finished machine.