MRC Forum- brought to you by www.morini-riders-club.com

That will be dificult to buy only a 501 motor in Spain. Like Mickey said, it would be easier to find a complete (no running?) Excalibur

As far as I know, the L5 was only in motors of the 501 (Camel and Coguaro, not in the customs). The cams of the 500 and 501 have a samller "ground diameter" (350: 20 mm, 500/501: 17,5 mm). 350 cams like the M don´t fit in a 500 motor because they woudl hit the connecting rods, meanwhile yo...

The L5 (II) is very nice as well and obviously the best for 500/501 (a M won´t enter in them) I´ve never tried a L5 in a 350. I know some people who prefer the M inspite of the S in their 350 circuit runners. The great advantage of the M is a good tourque all the way without any leak at mid range, i...

For me the M-camshaft is the best one

That´s true.
Since decades I only use the all aluminium ones.

Normaly I reuse the gaskets several times as well.
In former times I checked the torque after 500 km. To save some work (taking off the rocker blocks etc.) lately I do the same: a bit more torque, leave it some hours and then the torque recomended.

That´s great, grazie mil!!!!!!!

After a 50ccm Zündapp scooter my first real bike was a Suzuki GT 250. Two years later in 1980 my first 4 stroke bike a Morini Tremezzo Sport. Since then up to now only Morini 72°V (1988-1999 without bike). And probably I´ll keep on like this. Don´t realy need other thing. Actually I´m going to build...

Afriend of mine had this problem with another model (Scrambler?) on the motorway leavin the tunel in Hamburg. He was lucky not to fall. There has been a long long dicussion in the german forum also with specalists envolved and invetigacton in the labatory of an university (not ofically of course) It...

You can try a thread file if it is not damished en all the thread. Don´t remember the tread an in the moment I´m in Cadiz so cannot look. But I´ve cured the thread of a 500 with this file

If it´s only one or twoo nuts that are locked I prefer destroying the cups of the springs with a rotaflex instead of using too much force with the danger of loosening the studs in thebarrel. To find a barrel in good conditions is much more dificult and expensive than a pair of theses cups. Cutting t...

To me the 140 ohms sounds like the main problem. A lot of carb issues turn out to be ignicion ones. My experience says that starting problems begin with less than 170, 180 ohms.

I also would suggest the Surflex set! They nearly last forever and you need a good dished one, as Steve said.

Yes, the Polinis require smaller main jets than the K+N replicas I used before (115 to 130 more or less, both with slides 50 and 268T atomizers). To fit the Polinis I had to add some O-rings on the carbs. Rocinante with the 350 airbox (no matter if there are filters inside or not) needs main jet 130...

Norbert. Where did you get the aluminium clamp rings for the rubber manifolds? cheers Paul Years ago one guy of the german comunity has made some of them. I regret having bought only one pair of them :roll: Especially the one for the cilinder conection is very useful. I´ve had a lot of broken 501 m...