Startup time again

I have been starting up the renovation again. Wheel rims were cleaned and new tyres and tubes on. After a lot of though, tyre testing of Schwalbe on my Vespa and some Indian brand called nylogrip zapper, on my other Lambretta, together with recent bad info about Schwalble. I ended up ordering Michelin SM100. I’ll see what they go for next summer.

Next up a rebuild of forks and front inboard disc that will get a hydraulic semi conversion! Pics to follow!

Cheers

Transmission

With the engine out of the bike and the piston and cylinder removed it was time to get into the actual transmission. 
It still amazes me how clean and well shaped everything is. The engine seems to have hold together well under it’s lifetime.

I’ve seem to have great difficulties removing the clutch arm, the circlip holding it together is very tight and awkward placed so that I’m not able to grad a hold of it and drag it out. As soon as I try dragging it I lose my grip of it.

My biggest problem though is the front sprocket:

I’m definitely not an expert; this is my first engine rebuild. I hope everything I see is ok. 
I did remove the whole clutch and gears with no problem. But I cant remove the front sprocket, I tried various tools, power socket drive, I bought an conrod holding tool but nothing helps to aid me to remove the bolt that runs through and holds everything together. Did check the complete spanners, did check the web. No one seems to have had any problem removing this. Any Ideas?

Piston

Today the piston saw the world again after decades!

The piston in the cylinder

Fairly dark from the carbon deposits.

It looks fine with some small marks on the side, will have to clean it up and check the rings.

Piston

Piston

I wonder if I should try to reuse this, what do you people think? Otherwise I’ll have to source a good tv175 piston.

Engine removal

Today I took the engine out of the frame so I can more easily work on it. It looks like it’s definitely been stored in a barn sometime under it’s life since I found hay on it!

Barn find, engine with hay on it

The engine also showed a crack on a stud for the crankcase cover. I saw the same on the rear brake hub, I figure some former owner must have dropped the bike while trying to change rear tire, or it was that now famous repainter.

The crack on the engine cover around the thread for engine studs

rear hub showing the crack in the hub corresponding to the same on engine case

Hopefully I can weld the aluminum case so I can rebuild the metal around the thread and if the hub is nice and strong otherwise I can still use it. Since Spanish ones are dead hard to find and Indians are mostly ok I prefer to keep my original.

The whole point of this resto is to not unnecessary throwaway stuff that actually does still work fine.