Peugeot 103 70cc, cylinder head, decompression valve, CDI, Timing, Dellorto

I install a Polini 70cc decomp head to match the jug on my 103. I build up and install a new decompression valve for it, and get that installed along with a cable so that it's easy to start! I used a full metal headgasket. I pull off the flywheel to show an important modification if you run the Treatland Le Partie CDI kit, machining it so that the crank won't strip when it's torqued. I get the timing set and fix the choke on the Dellorto carburetor as well! I included torque specs also.
Stay tuned as I get this thing dialed in for maximum rippage.

[@miguelpagansr6128]

I built a motobecane with a 70cc kit and I was able to tune it with a 74 jet and it's a sweet ride.

[@10mm]

nice that's awesome

[@clovis1979]

hi Ben great modification with your polini cylinder head and on the flyweel. i had almost the same setup and had a 72 jet on it, a bit rich but just enouth. and for sure get another pipe then you will be surprised

[@10mm]

Thanks for watching man! Funny you mention jetting, I just finished editing a video on that too haha. I'll look into pipes for sure, love to get a fat expansion chamber on there

[@andrewbobroff3187]

Good work, rock on

[@10mm]

Thanks man!

[@miguelpagansr6128]

I have a 103 sp and I have the same problem, what thread pitch is it? I'm still running the stock crank on it, thanks.

[@StephanoAnamalay-bh6pj]

What alumage you put on?
Motobecane?

[@tuberider2077]

Hey did you get it up to 60mph

[@10mm]

On a downhill maybe