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Mag flange question
Posted: Sun Sep 04, 2011 4:24 pm
by coaster
Are there any issues using a an Li S1 or 2 mag flange with a tuned engine? It's the one with the big circlip and the channel for lubricating the bearing.
Cheers
colin
Re: Mag flange question
Posted: Sun Sep 04, 2011 4:41 pm
by Supereibar
... Colin, this will mean that the crank on, lets say a ts1, will only get lubbed with premix on the Mag side.. I wouldnt think its a good idea. It does work on a standard engine, althou the best explanation in the history of Lambretta manuals is given on the Lambretta "Servicemans' Book" Third edition on page 45:
"With the earlier machines, the generator side bearing relies on petrol/oil lubrication, but this is only sattisfactory if the special two-stroke oils of the major oil companies are used. Even so the bearing gives a dry appearance and characteristic rattle which are quite normal."
Its British humor at its purest essence. Brilliant
J.
Re: Mag flange question
Posted: Sun Sep 04, 2011 5:11 pm
by byron
they're Series I, didn't realise they were fitted to Series II too.
Given the availabilty of later mag housings, i wouldn't use one, but have got one here you can have for free if you want to try it.
Re: Mag flange question
Posted: Sun Sep 04, 2011 6:46 pm
by Muppet
Is that how a vespa bearing is lubed; petrol oil mix,
Re: Mag flange question
Posted: Sun Sep 04, 2011 6:48 pm
by mark
think chris sturgess has an idea on this
Re: Mag flange question
Posted: Sun Sep 04, 2011 6:55 pm
by Muppet
drilled oilway in mag side transfer feed to draw oil fuel through the bearing; it lowers primary compression; with better coolant of magneto bearing with some additional work to the bearing seating to encourage fuel mix to draw through,
muppet
Re: Mag flange question
Posted: Sun Sep 04, 2011 9:57 pm
by coaster
byron wrote:they're Series I, didn't realise they were fitted to Series II too.
Given the availabilty of later mag housings, i wouldn't use one, but have got one here you can have for free if you want to try it.
Cheers Jarv but I bought one in the parts fair on Saturday, I wondered why it was so cheep, I was so fixated on the condition of the cowling threads, I didn't notice the cut out on the back leading down from the transfer cutaway.
Would it not be possible to just blank the cutout and fit a GP type bearing without the spacer?
Re: Mag flange question
Posted: Sun Sep 04, 2011 10:05 pm
by Muppet
only one seal on the maneto housing its total madness? or is it the future! dont tell or they will all want one,
muppet
Re: Mag flange question
Posted: Mon Sep 05, 2011 8:27 am
by Supereibar
Muppet wrote:it lowers primary compression
You got a point there pal. But then wouldnt this make it not elegible then?
J.
Re: Mag flange question
Posted: Mon Sep 05, 2011 2:08 pm
by coaster
Supereibar wrote:Muppet wrote:it lowers primary compression
You got a point there pal. But then wouldnt this make it not elegible then?
J.
I think it depends who's tuning theory you follow Jiamie
