... to be continued.
29-06-99: The bug report
Buona sera Friends,
I've got some bad news - at least for me:
Last saturday I decided to fix the leaking gaskets of the front cylinder.
Already during the strip down I noticed, that one of the four nuts keeping
everything together was fairly loose - but didn't care about it and
proceeded. The foot/base (?) gasket (paper) was damaged - as I expected.
Cleaning and polishing all the surfaces thoroughly took quite a long time
and ellbow grease. Additionally I checked the valves by pouring petrol in
the ports of the head - and they are perfectly tight. Although the piston is
still the original diameter, there' no excessive wear. The bearings of the
connecting rod show no noticeable radial play. So far the good news.
The holes of the new gaskets (aluminium) needed slight machining with a
knife to make them fit perfectly. I assembled base gasket, cylinder, head
gasket and put on the head, managed not to forget the washers while
attaching the four nuts, grabbed the small wrench to screw them down until
they're seated properly and .......... FUCK! What's that? One nut just
tumbled between the valves - together with a piece of thread! It took me a
few moments to realize, what has happened: The stud died - although I
haven't applied any noteworthy force. I haven't even looked at the torque
wrench.
The stud must have been badly damaged already beforehand, which also
explains the loose nut from the beginning. Maybe crappy steel. Maybe a
previous owner tried to fix the leakage by torquing a little bit.
I call myself lucky, that this didn't happen on the road at 6000 revs!
Now some problems arise:
So far - so bad.
Ciao Sebastian
1) Finding a replacement. Haven't tried yet.
2) I'm not shure whether trusting the remaining seven studs is a good idea
or not. I tend to 'not'.
3) Will it be easy to remove the rotten one. Haven't tried yet, 'cause I
was so frustrated and just closed the engine provisorily and left the
garage.
12-07-99: The solution
Ciao ragazzi/e,
friday afternoon I went to Luzzi and got the stud. He asked 18.000 Lit.
for one, which is about 18 Mark, 9 US$ or quasi 9 Euro. According to him
it's sufficient to replace only the broken one - of course after checking
the others. I bought two, so I have one in spare for future use.
I reassembled the whole stuff on saturday and had a hard time waiting for
the silicone to cure. Yesterday evening we had the first test-ride and
after approx. 100 km the engine is still tight. Looks good!
I also saw studs for the 500 - they look very weird (compared to the 3
1/2 ones) with thin and thick sections - but are cheaper for one reason:
There are much more left.
Ciao Sebastian
02-08-99: Remark
The extraction of the rotten stud using a small pipe-wrench was quite easy because I didn't mind further damage. I mounted the new one with the 'two nut on the upper thread' trick. Somebody from the list also mentioned a proper tool called 'stud remover' - but I was too impatient to look for it.
Even after almost thousand kilometers the gaskets are still tight, so I'm assuming that the repair was successful.
Buona sera,
my Morini seems not to like me very
much - but from the beginning:
last saturday I finally got new tyres (Pirelli MT65, front 3.25-18 and rear
100/90). The rear one is quite slim but the 4.10 or 110/90 is no longer in
production as a S-type - according to the guy in the shop. My first
impression was very good - no wonder, they replaced 10 year old tyres.
In the late afternoon I started for a nice trip and returned back to Perugia
in the dusk, moved the bike in the parking lot, unmounted and immediately
noticed that something has changed - the left side cover is missing!
Obviously the -BEEP- fixing screw became loose due to vibrations, fell off
and the whole cover with it.
It could have happened only during the last 40 km (It definately sat at its
right place at the last cigarette brake), unfortunately most of them are
4-lane motorway.
I immediately checked the streets I took in the city, but it was already too
dark to search in the countryside, especially with the not-so-bright Morini
headlight. So I got up quite early on sunday (dawn). Fortunately there was
almost no traffic on the roads and nobody cared about me driving very slowly
- looking left and right and hoping to spot the missing baby. Damned, you
couldn't imagine how many red things are lying beside the streets: Coke
cans, cigarette boxes, smashed tail lights, ....... but not the cover. I
arrived home frustrated, went to bed and slept until 11 o'clock. I'll try it
once again today after work - but I'm not very confident though.
So,
watch the screws and tight them firmly!
BTW, has anybody a surplus left hand side cover she/he would trade/sell? New
(angular shaped) version, preferably plain red with a white '3 1/2' badge as
seen on the picture on my website.
So long,
Ciao Sebastian
P.S.: After 400 kilometers I'm still convinced of the new tyres.
10-11-99: Remark
Thanks to a very kind reader of this pages who offered me exactly the cover I've lost the Morini is complete again. Grazie tante Nicola!
01-11-99: Remark
Now I'm quite shure that only the very old (>10 years) battery was faulty. I replaced it with a new one, checked the regulator and alternator assembly and after 300 kilometers the acid stays were it is supposed to: inside the battery.