Wednesday, November 26, 2014

Taking the Yamaha LS3 apart

Although the frame was still solid it was covered in rust and the black paint was peeling on several spots. This bike is in desperate need of some TLC. A couple of days before I started the disassembly I soaked all the bolts and screws daily in WD40. They all came out pretty easy and undamaged, the only two screws giving trouble are the ones holding the ignition coil, Grrr...
Before you can take out the engine remove the fuel tank. Don't forget to empty it, or put something in the fuel hose between the left and right side of the tank. Same story for the separate oil tank.

Removed circlip of the shift pedal Yamaha LS3 1972
Removed circlip of the shift pedal Yamaha LS3

Taking off the shift pedal mechanism Yamaha LS3
Taking off the shift pedal mechanism

Removed crankcase cover Yamaha 100 LS3
Removed crankcase cover, remove it together with the clutch cable

Original chain Yamaha LS3 100cc
Still the original chain see the yellow dot

After a bit of cleaning
Next thing is to remove the throttle cable together with the valve, disconnect the air filter joint and all the wiring connected to the engine.
Normally you also have to remove the oil pump cable but mine had been removed years ago.

Removing the throttle cable and valve Yamaha 100 LS3
Removing the throttle cable and valve

Oil tank Yamaha LS3
Oil tank Yamaha LS3

Engine and frame separated Yamaha 100LS3 1972
Engine and frame separated

Getting there


After taking a lot of pics from the wiring I disconnected all the cables. It looks like they are all still original with the right colours.

Disconnecting all the wiring

Handle bar and wiring Yamaha LS3

Original cable harnas Yamaha LS3, and a bit of rust...

 Actually the rust gave me some trouble... When I tried to remove the left inner fork it wasn't moving at all. It was rusted into the upper triple tree. It took me two days of WD40, wiggling, hammering and @#$! to separate it from the triple tree.

Rusted inner fork and upper triple treeYamaha LS3

Front fork in bits Yamaha 100 LS3 1972
Front fork in bits

Frame Yamaha LS3 100
Almost done



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