It is time for the chain-case to be assembled. I decided to go with a Granturismo chain guide. The old chain still looked fine so it got reused.
Clutch is built with GT springs and Surflex plates. I tried the BGM clutch plates first but they were a tad to thick and required thinned inner plates. After trying lots of different combination with thinner metal plates without success I took the BGM cork plates out and bought some good old trusty Surflex cork plates. Stick to what always have worked is probably the key here.
I really liked the Granturismo chain tensioner. It is solid and robust in it’s construction. Assembled right, it was easy to set up correctly and push the chain.
Next step is to look at the top end side. Some new barrel studs were added in order to get some high quality items and get rid of the SIL ones. Because of the dimensions of the GT KIT and it’s porcupine head longer head nuts or multiple head nuts will be needed. The gasket came with the kit and is probably the best base gasket I’ve ever seen in my life.
The piston is also a work of art as expected by the Japanese manufacturers, It’s the same piston as in the Yamaha 350 LC bikes.
Next I slided on the cylinder, with some light taps with my palm it went all the way in.
Fantastic inlet for the special reed. The reed is lowered in to the cylinder making it possible to use large carbs on the standard side. Thus not needing to sacrifice the battery tray.
Lastly the porcupine head went on. It has a special porcupine patterns that’s supposed to aid cooling far better than the standard Lambretta heads.
This head also gives you the option of using a central plug if you like, The blanking plug has a thread that takes a K type heat sensor for CHT readings. Neat!
That’s it for now. Next It it will be time to get the engine back into the bike, stick the carburetor on and try it out.
Lambretta TV175 Series 3 