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To me that sounds a lot like air leaks concerning the rubber manifold head-carburator. Test it like Tom says with breake cleaner spray or something like this. When it is running at high revs at idle try to press the carbs towards the head or just moving their position a bit. When revs are changing, ...

My experience with the center stand bolt is, that the main problem used to be a corroded tube that should be free (and lubricated) inside the tube of the frame. The stand should not turn on the bolt itself that is fixed in the left part of the stand (and the frame?), but often it does because these ...

Take the spark plugs out, conect a Multimeter to the green cable coming from the alterator (AC voltage to ground). Sit on the bike holding it firmly on the center stand, 2nd or 3rd gear. Now a friend that have have had a good breakfast schould turn the wheel in direction of running. You should measu...

In a 350 frame the back will rise and change a bit the geometria of the chasis.
I´ve mounted some 315 mm Konis instead of 300 Marzocchis and for me it´s ok with clipons and self-made rearsets.

You can convert a left hand caliper to a right hand one just changing the posicion of the bolts

This is one of these plates that is mounted with twoo srews (a little one on the axle of the swing arm)?
If so, try Dieter Hoffmann in Germany morinicorse1@aol.com

I don´t know if he has the parts apart, but some years ago he sold complete Tarozzi rearsets

The length of the 350 (300mm) is not the same as for the 500 You took it off a 350 or from a 500?

And have a look at the little mixture screws. Especially the fron one may have lost the peak. There schould be the srew with its peak, the spring, a little washer and at least a small O-ring. the washer is to protect the O-ring towards the spring.

Going down with the bore of the master cilinder changes everything! I´ve put a 13mm Grimeca pump (two discs) and it´s a two finger brake. I think 14 mm would be the way to go with two discs, 13 mm will do perfectly with one disc.

I need both chokes on for a cold start but I have to be ready to flip one choke off straight away or it will rev at 5,000rpm. On one choke it's revving at 2,000rpm. Engine needs choke on for about 3 miles to stop it stalling at junctions. One of my 501 needs the same procedure, both choke, one kick...

I´m actualy delighted with Conti Road Attak (front) and Conti Classic Attak (rear). These are radial tyres! As long as they were available I used Avon Roadrunner. When they disapeared Avon Roadrider (the Roadrunners were better for me), then I tried BT45 (best tyre till then, but much less km then t...

Probably I have one of theses springs (I´m quite sure)
The problem is that the spring is in Germany and I´m in Spain til the end of may

So if you can´t find one ´, remind me. The easiest way would be if a Morinisti of GB comes to the german meeting and could take it with him

:lol: The worst thing of the Morinis (nearly the only thing) to me is the position of the footrest. This position spoiles that buityful and excelent bikes. Everythings changes tremendously mounting set back footrests! Even with Strada handlebars, and with clipons it is obligatorio if you don´t like ...

Try the Liebrabdt brothers, they are the successores of Wolfgang Tritsch
https://www.tremezzo.de/impressum.html

I would think that 520 front sprockets should be available in GB as well as in Germany from the usual dealers. I´ve never spend such an amount for it