Which Vespatronic fits my motor?
I wanted to convert my Vespa GS160 to 12v and
improve the ignition at the same time, so I bought a Vespatronic 50004200.
It does not fit, despite me telling order people that my motor is VSB 1T
0053911. It is quite irritating that it does not fit. Smallest
part of my axel-cone is 16mm and the flywheel is 17mm.
I assume I have to pull off the cam shaft too when I get the right Vespatronic.
Who knows the best way to do
that?
Unfortunately I have to answer my own question thru
trial and error. Having a GS160 with Motor No VSB 1M 0054073 it is quite
obvious that I need a 50004200 Vespatronic. No no, only for Germans, Swedes and
some others, not the Italians. I measured the flywheel cone on the 50004200 and
it is 17 / 24 x 37,5 mm and my old flywheel cone is 15,5 / 19 x 18,0 mm. Moritz
at Sipscooter took a picture on both 50004200 and 5004100 flywheel hole and
came to the conclusion that 5004100 could be the right one despite frame or
motor number. Of course I had to send the one I first bought back and get this
new 50004100 instead. It arrived and I started to measure the flywheel cone. 15
/ 21 x 30,5mm will fit my axle except for the cone depth. The ignition cam ring
has to be pulled off. After 48 years it got really stuck and I grinded it off
instead of risking to damage the crank.
Could my old flywheel work properly with a cone depth of 18mm so could even
50004100 work with the same depth and avoiding removing the ignition cam ring. The Alfa Romeo engineers would have done that.
To defend the Italians you might say that my crank shaft have been exchanged. No Sir, previous (first) owner is a good friend of mine so I have 100% history information of my pearl.
Since I have been working with technical information
and written loads of literature all my life (50 years), I’m quite keen on
giving a customer accurate but simple information.
I therefore recommend Sipscooter to edit their information about these two
Vespatronic articles with information about the cone size and removal of
ignition ring. This mistake thrusting motor number did cost me 48 Euros to send
back due to lack of correct information.
I also have to say that Sipscooter is a very good negotiator concerning freight cost. 5,25 Euros is perfect for us customers. To send back my Vespatronic with DHL would cost 121 Euros
Regards
Martin Eriksson