vaccum holes on Delortos

andrew112_uk

andrew112_uk

Senior member
"Fit the vacuum gauges to the vacuum holes" says the manual.

Um I can't find the holes  :-[

Can anyone point them out to me?

Thanks, Andrew
 
Sort of brass sticky up things* either connected to a balance pipe/tube going to the next carb or covered with a rubber bung.

*Spigots!
 
Hi andrew,

And don't forget to put the little tubes with the t-piece back on. Look for cracks in those old tubes while yare are around there anyway. Must be tight.
All other parameters must be dialed in before sync'ing the carbs.

Cheers,
Jacques.
 
Good point.  The tubes on mine were rubbish and the vacuum was enough to suck them flat (or so it seemed) and affect the running of the bike.  A new set made it run a whole lot better.
 
Thanks chaps.. sync' went fine once I found the spigots... but not road tested it yet. I'll check the pipe tomorrow but it's a refurbished carb set so it should be fine  :)

Andrew
 
Anyone else remember the tiny little screws that plugged the threaded vacuum tap holes on the very early triples? Absolute buggars to get back in, M5 threads but only about 4-5mm long. Always fell down and under the starter motor so you had to take that off too. The spigots with rubber caps are much better.

Ken
 
Andrew,

They don't HAVE to be connected, it's just the way the factory did it.  You can block them separately if you wish.

Connecting them does seem to have its' advantages, though.  It will, theoretically at least, even out slight misalignment of the carbs at idle.  And it is easier getting a connecting hose on and off those tiny hidden spigots as opposed to seperate bungs!

Clever guys in Breganze... :D

piet
 
Yeah, it sounds clever until a tube splits on a red hot engine (which you don't realise until you start looking, ie tank off all luggage off, by roadside pissed off, like your fellow biker mate etc)as you pull off the ferry in Santander surrounded by a 1000 bikes all keen to go, while yours acts like a pig,stall refuses to idle etc etc. So put replacement of those tubes on the maintenance shedule, eh? Or carry a bit of spare..with those  throttle /clutch cables/inner tube ;)
Nick7
 
The other option is to have a backfire problem that you spend way to much time replacing and sealing the exhaust and get nowhere.

And then 500ks from home it starts to run on 2 cylinders,you investigate and discover 1 missing 5mm Vacuum port screw and the other 2 loose and ready to fall out.Damed if you do and damed if you don't
 
Fair enough Piet! It is quite surprising to me anyway how a gleaming chunk of Jota runs perfectly one minute and like sack of something unpleasant the next, all because opf a split in a small piece or rubber tube.These are fragile beasties in some respects...guess its the same with any crucial electrical wire of course. As for the maintenance, what shiocks me is how the years whizz by...those brake lines you thought you'd just put on are suddenly old and due for replacement. Like my DRZ400 Suzuki..I think of it as new..its 11 years old! Not to worry, just p/xd it for....wait for it.....A KTM  690 Duke R...mad as you like!(thats me and the bike)you've got to try one, before you die, as they say
Nick7
 
Well Nick, see it this way;

Run around your block as fast as you can, pretending you're a Jota.  Then repeat it while choking yourself..... bet you'll feel the difference almost imediately!! :D

piet

Already tried a Husqvarna 610 a few years back.... sore butt syndrome after only 50 miles!  Not a chance.
 
Piet,
Obviously not the same bike...if you get on a KTM Duke 690R, you won't be thinking about your butt, I can guarantee you. You will be gobsmacked, like me (er, by my wife within 20 meters of riding pillion) ;)
Nick7
 
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