The 1967 Triumph T120 evolved from the first models that rolled out in 1963. The bike features a 650cc Bonneville engine with dual, Amal concentric carburettors and dual exhaust. Restoring the motorcycle to showroom condition requires mechanical expertise and dedication to authenticity. You can elect to perform a bench rebuild of the engine, gearbox, clutch and carburettors as part of the restoration. With many vintage motorcycle projects, finding replacement parts and accessories is a challenge. The manufacturer's workshop manual is a must when you restore a 1967 Triumph T120 motorcycle.
- Skill level:
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Things you need
- Triumph workshop manual
- Standard gauge tools
Inspect the motorcycle frame for structural defects, such as a cracked weld or rusted sections. Repair the frame by welding or brazing. Sand the frame, fenders, side covers and chain guard and apply two coats of epoxy primer. Repaint the parts with two coats of the factory colour and a clear coat.
Remove the rubber knee pads and chrome logo trim from each side of the gas tank if repainting is necessary. Recondition the inside of the gas tank using a gas tank sealer before repainting. Disassemble and service the fuel petcock.
Send the rider's seat out for reupholstering. Provide the upholstery shop with two-tone vinyl covering in the stock colours.
Frame, Tank and Seat
Service the wheel hubs and axles and replace the bearings if necessary. Attempt to restore the chrome finish on the wheels and spokes using a mild pumice cleaner and chrome polish.
Select the front tire and rear tire that are compatible with the stock wheels. Mount new factory TR tires or aftermarket tires with inner tubes on the wheels.
Refer to Section F in the workshop manual for drum brake information. Resurface the drums and install new brake pads if necessary. Otherwise, disassemble and clean the drums and pads with fine sandpaper.
Assemble the wheels and drum brakes and mount the wheels on the motorcycle frame. Elevate the frame on a repair stand.
Wheels, Tires and Brakes
Compile any replacement accessories, such as the exhaust pipes and mufflers, hand levers, hand grips, lights and foot peg covers. Include a new drive chain, or recondition and lubricate the existing chain.
Mount the engine onto the frame. Refer to the appropriate sections in the workshop manual for installing and connecting the ignition coil, ignition wires, battery and battery cables.
Install the carburettors and air filters and attach the fuel lines. Connect the throttle cables to the throttle grip. Install and connect the new clutch cable and brake cables at the hand levers.
Install the drive chain and the chain guard. Connect the rear brake arm. Mount the fenders and lights and connect the light wiring. Mount the gas tank and attach the fuel line to the petcock. Attach the seat on the motorcycle.
Accessories and Assembly
Tips and warnings
- The extent of restoration depends on the condition of the motorcycle. Attempt to restore as many original parts and accessories as possible.
- Lubricate the motorcycle components and cables as recommended in the workshop manual.
- Use the recommended SAE motor oil.
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