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Rebuild a 250 Alpina 1974 type 115

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  • Author

Primer is done, I have seen some impacts to be done before the final color 😁...

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  • Finally, from (without registration):  To : New  seat New OKO carburator New tires Tank restored  with new petcock New chain and sprockets Bottom engin rebuilt

  • I use a socket with the OD machined down to fit onto that nut. Yes a clutch holding tool is required the way you are doing the work, but if you are going to pull a Bultaco motor apart again, cons

  • Engine is out 🙂, I wish to open it asap but the frame is the priority...  

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  • Author

New ignition arrived today 😃...

Next will be the piston, if needed 😆.

Then I will have all to renew my engine: ball bearings, seals, new connecting rod (by experience, I always change bearings for old bike to prevent a reopening ).

I never keep engine open, you never know what could happen (loose elements, corrosion)...

At first to finish my gas tank, but the temperature drops to winter season 🤥: difficult to paint in such condition.

 

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  • Author

Thank you, the fuel tap was probably out of service and repair with US thread... 

I already ordered the one from Ebay. 

Painting is on way, stickers and clear coating to come ..

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  • Author

Exhaust / muffler: not the central part.

This bike seems to be done with a "standard" from the web.

I don't want to put 250USD for this silencer

I love this example, any idea ...🤨

 

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  • Author

I received the petcock, the gas cap is redone (waiting the new  "O" rings)...

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  • Author

Otherwise I got my new carrier, I did some improvements (lights / Turnbuckles replaced by 2" straps).

It's a very good solid product , but expensive 😒

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  • Author

To come back to previous question, this seems to be the original design:

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  • Author

To come back to previous question, this seems to be the original design:

IMG_0130.thumb.JPG.f812fb9075da8ac4388ec88e1bf6a60e.JPG

4 hours ago, Divouneh said:

To come back to previous question, this seems to be the original design:

IMG_0130.thumb.JPG.f812fb9075da8ac4388ec88e1bf6a60e.JPG

Original Exhaust for the US.

  • Author

Cleaning from my workshop for the next phase 😗...

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  • Author

Cooling blade: I will keep as it is (any advices ?).🙂

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  • Author

Top end open: original 72mm diameter.

It looks very clean inside, no scratch, very little carbon deposit: seems to have low hours 😏...

This bike has no head gasket ?

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