General Category > Bike Builds, Rebuilds And Restorations Only

1975 Moto Morini 3 1/2

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Canuck750:
I bought a decent 1975 Moto Morini 3 1/2 Strada about five years ago out of Arizona knowing the engine needed rebuilding; the PO had a leaking fuel tap that flooded the crank case with oil and washed the lube out of the big end shells, It has sat forlorn in the corner of my shop, always being passed over by another project. I had the tank and side cover painted when I brought it home, other than its just collected dust.

As bought



repainted parts - 1975 Strada colour scheme



Other projects await parts so I put the little Morini on the lift and tore it down. The bike was well looked after so it all came apart easily



a day of stripping down the engine and vapour blasting all the parts



One con rod big end shell scored



Crank will get reground with 1st over big end shells, I will replace all the case bearings even though most feel ok. Pistons and bores measure up tp spec, I will replace the rings and criclips



Forks are nice, the tapered bearings look new, I will just replace the fork seals and dust caps and the headlight ear rubbers



front and back wheels in real nice shape, good tires, I will just vapour blast the hubs and these will be good to go



I put on a new set of Italian shocks, Sebac I think



Frame components stripped, off to powder coater today for Carbon Black



All the zinc plated parts vapour blasted and rinsed in Muriatic Acid, off for bright cad plating

Antietam Classic Cycle:
 :thumb:

Canuck750:
Yesterday I dropped off the parts for zinc plating and today the shop called to say the work is already done! Talk about excellent servcie, and the shine on the pieces is fantastic.





Dropped the crank, rods and shells off today with the machinist / crank grind specialist, he took one look at the crank and said the crank oil openings had not been properly chamfered and that led to some small foreign debris getting hung up on the crank journal opening. He also ground my 500 Morini crank so he has some experience with them. The factory manual is missing the stock dimensions for the crank journals but the suppliment that Herdan Corp printed lists the main journal as 30mm.

Unfortunatly the shells I bought are standard size and not over so I hope the crank does not need grinding and the new shells I have can be used.

Scout63:
Great pictures Canuck. I love the plated parts. Interesting thread already.

Turin:
Looks familiar... did you post before pictures previously?

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