My Motom project 2

Hello Morton enthusiasts.

Today I could do some work on the road going Motom
Have made some spacers to camouflage the top spring.



And I mounted the 18 inch wheels with new tyres to see how that looks.




Now I'm thinking what to do with the fenders.
I had planned to make a nice classic 180 degrees front fender,
But now with the original (big) fenders it gives the Motom some body. (looking good too)
Should I shorten the rear fender to make it less massive, ore replaces it with a little one?


I will wait on my ordered fenders to show how they look.

Kind regards
Louis

We had some time to mount the front fender.
Perhaps not the prettiest solution, but it will need to do the job.
At least she has the original front fender to keep the known Motom looks.

More info here: http://guzzi-cardellino.com/motom-front-fender-1.html

Some pictures off the build.




The next step is making some end stops for the steering angular.
Then I will take here apart and paint here properly, reassemble here again and start riding/ testing Motom engines.

Kind regards
Louis

Well, in big lines I know how the looks need to be, so it's time to take here apart and do a proper paint job.
Will fix scratches and damaged places so ones it will be painted, it should be OK

Going from this:


To this:



Here we have the new starting point. Will start repairing unnecessary holes. and weld thinks.


Here we go:








Edited by Louis Motom - 21/3/2021, 15:00

Have all frame parts at the painter, so with a bid of luck it will be ready next week.
This gave me some time to solve the problems with the test engine.

1) The front sprocket off a Zappa engine is different than a normal Motom so had to create something the get 17T
2) And needed to find a useful top end with a 15/15 setup

The front sprocket I solved like this:


Then weld, and machine it.


But to get usable top end that was a bigger challenge.
I looked trough all the parts I bought an found a good cylinder and piston 40,2mm (on the left)


Also found a 15/15 head.


But it was a strange head it had no center hole in it, need to drill it.


The next problem I had is a 40,2 piston is hitting the stock head, because the combustion chamber is only 39,8mm.
I could widen the combustion chamber to +/-40,5mm but found a 39,3 cylinder and piston.
Sadly, this set is not that good as the 40,2's but will have to do. Think it will last a 100km for my first testings
Cleaned the piston and mounted it all.


Hopefully I can finish the engine tomorrow, and it will be a plug and play when the frame comes back.

Kind regards
Louis

Hello Fabio,


Yes, you have full right, this is not a step I'm intended to do over and over again
But keep in mind this is my Test engine. (this engine is only build to give me a feeling what a Motom does)

For many of you guys the Motom is well known.
For me it is not, the only experience I have is:
1) A couple of blocks round the block at my place
2) A couple of runs at my parents place
3) Just some throttle responses in the garden.

So to get me some experience I bought myself a road going Motom.
And this engine will be my test engine it will need to hold (estimated) around 500km in total. (So the sprocket is not new but I think she will hold)

I like to know/test the following.
1) How does the engine react on changing ignition timing (therefore the zappa engine it gives me easy access to change)
2) How does the engine react on bigger valves (starting now with 15/15) nexst will be 15/17 and 15/18 also 16/19 and hopfully a 17/20
3) How does the engine react on bigger carbs (starting now with 9mm) nexst will be 12mm 14mm 15mm 16mm 18mm
4) How does the engine react on bigger pistons (starting now with a 39,3) nexst will be 40,2 also have 41+ etc

Hope to get my frame back soon so I can put it all back and make a running Motom.

Kind regards
Louis

Could do some work on the ignition system.
The idea is to make it easy for me to check the ignition timing with a timing light.

I made the following.




More and larger pictures here: http://guzzi-cardellino.com/motom-ignition-cover.html

Say one thing I noticed, I'm not happy with.
It looks like the inlet rocker arm is too large, but is the same as all others I have. So the intake valve is not pressed at center.


Hopefully it will hold a +/-50km

Kind regards
Louis

The Painter sent me these pictures, tomorrow it will be "fire red"

The painter sent me these pictures, its now all red
It looks great.







With a bit of luck, I can start mounting parts this weekend.

Also blast the aluminium parts, looking very clean

Slowly getting there, starting to mount parts back.
Got a rolling chassis again, but its far from ready. (head light and tail light will be painted black)

Also today I could make some small steps.
But still a lot of work needs to be done., for one thing I don't like the exhaust. (Pointing downwards) will need to change that.
Also the black cables will be grey to get one uni setup.

Bellissimo Louis

Hello Motomrrad,


Thanks

This is the idea in big lines, she still needs more work on the details.

Could do a tiny bit more today.
1) Changed the black cables into grey cables.
2) Mount a different ignition coil.
3) Fixed the carb (experimental) http://guzzi-cardellino.com/motom-9mm-experimental-carb.html



Mounted a different exhaust, this one fits much better but is very rusty. Need to findout witch type this is.


I need this type


Not this one

Ciao Louis,
le marmitte originali di fabbrica sono circa tutte uguali, anche se il numero stampato è diverso.
Cambia la curva per le marmitte più vecchie che vanno montare sulla serie 12, dove cilindri hanno la testa insieme al cilindro, sono i modelli più vecchi.
La cosa da sapere è che all'interno del silenziatore ci sono 2 ostruzioni (paratie, setti) di lamiera che ostruiscono lo scarico.
Se vuoi far girare bene il motore con lo scarico di fabbrica devi rompere queste due paratie, per farlo basta usare una barra di ferro piatto da inserire nel buco di scarico e colpire con un martello.
Quando sono rotte le ostruzioni il motore va molto meglio e non fa tanto rumore.
Allego schema della marmitta che cerchi.

CIAO