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16 Dec 2020
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1973 125 Arcore recommissioning 2 years 11 months ago #8099

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Hi
As promised in the welcome mat section here is a thread covering the recommissioning of my pal Tom's 125 Arcore.

Thanks for the English manual in the files section - very handy. I got hold of the early Italian manual with the diagram for my wiring loom from oldtimerworkshop.com/

We bought this bike blind except for some photos and I was happy to find everything looked better in the flesh that it did in the pictures when the bike arrived. Missing bits are the little grab rail, the front section of the chainguard (if there is such a thing) and the metal cover for the Superpratic throttle. The brakes seem pretty well adjusted and it came with a spare condenser. With most of the wiring unplugged as well I'm thinking there is an ignition problem. This bike is early so comes with the moped-like minimalist wiring and no battery. 25k Kms should be ok but there's not a lot of compression at the kick start. The paperwork suggests it was put on the historic register or maybe last used in 1979 and then might have been used again in 1990. Tom is Italian so he can try and unpick the truth!

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1973 125 Arcore recommissioning 2 years 11 months ago #8100

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A few problems to start with

Modified snuff box switch with with no mounting plastic fitted with nicely polished wood screws.


Missing throttle cover


Curious end of silencer


Missing passenger footrest

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1973 125 Arcore recommissioning 2 years 11 months ago #8101

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Carburettor

Nasty throttle cable needs trimming back and a proper bend added to the carb end.

Wayward floats. I could not find the float height setting in the manual so have gone for 25mm. Does anyone know what it should be?


Interesting washers holding the choke on can only help keep it open


Cleaned up like new with the ultrasonic. Idle mixture passages all clear. Float needle replaced. Stubborn leaded petrol deposits

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1973 125 Arcore recommissioning 2 years 11 months ago #8102

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Front fork

Drained the fork while looking at the electrics. Much water and mayonaise but the fork action is really smooth and the sliders look like new under the gaitors. I wonder if this is due to the hygroscopic ATF fluid they specify acting like a dehumidifier and pumping water out of humid air? They say this is what happens with the ethanol in our fuel tanks. Kind of looks like the nougat from a milky way.

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1973 125 Arcore recommissioning 2 years 11 months ago #8103

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Removing the magneto rotor

Made a not very good puller as I couldn't be bothered to wait. Flywheel popped straight off after I realised the 19mm nut needed unscrewing clockwise as it is left hand thread.

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1973 125 Arcore recommissioning 2 years 11 months ago #8104

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Dellorto VHB ?

Same as a Morini - they are set at 24mm for a VBH25 according to Dellorto.
"Do not adjust your mind, there is a fault in the reality"
1957 175 Sport
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