Why so cold blooded

telecasterguru

telecasterguru

Full member
Location
Sydney Australia
I took the RGS for its first official run yesterday. Let it warm up for what I thought was a considerable time maybe 5 minutes and then rode around 5 kilometers where the bike slowly stalled at a red light. I should have kept the revs up to it.

Petrol was also coming out of the overflow while warming up and riding after I had put 15 litres into what I believe was an almost empty tank. The fuel warning light was on.

To get the bike restarted at the red light I had to use the choke as it was not going to start without it.

Is it normal that the bike should take such a long time to warm up? I suppose I will learn all the bikes foibles as I ride it but thought I would ask.

Frank
 
Hi Frank

no, not normal for an RGS.

you are about to learn a bit about Dellortto carbs...... pretty good once sorted. I am short of time at the moment, and various of us have posted lengthy instructions at various times in the past. You are going to need to at least remove the float bowls to see which pilot/idle jet you have, choke plungers, and idle screws to check and see if the tiny little O ring is still one ach idles crew or whether it is sucking air.

Search variously    idle circuit, choke plungers, carb synchronization, idle screw, etc.

after you install fresh tiny O rings on the idle screws, if it still is cold blooded, and if you have 55 pilot jets, you are likely going to have to install 57.5, 60, or even 65's. Idle screws one and one half turns out.

Paul LeClair
 
As I understood your previous posts, the bike has stood for a number of years.  Taking it out and relying that everything will work satisfactorily without a thorough service beforehand is simply naive.

Although these bikes are robust, they really do not like standing dormant for any length of time.  Rubber parts perish, gaskets dry out, rust appears where it shouldn't... not a good recipe for a reliable bike.  If the service history of the bike is unknown, it should be treated to a very thorough going through before use.  There are lots and lots of trouble sources that need to be looked into.  The most obvious, which you have found out for yourself, are the carbs.

piet
 
Thanks for the info guys.

Yesterday I just thought I would take the bike for a short run to see how it would go after sitting for so many years. All in all I was happy with how the bike went but I did expect some problems to show up.

The bike does need a good going over and the carbs need sorting that is for sure.

It was great just to be able to have my first ride on my Laverda. I was a bit impatient I suppose.

After the new tyres go on next Thursday the bike will be going in for a thorough service.

Frank

 
telecasterguru said:
Thanks for the info guys.

Yesterday I just thought I would take the bike for a short run to see how it would go after sitting for so many years. All in all I was happy with how the bike went but I did expect some problems to show up.

The bike does need a good going over and the carbs need sorting that is for sure.

It was great just to be able to have my first ride on my Laverda. I was a bit impatient I suppose.

After the new tyres go on next Thursday the bike will be going in for a thorough service.

Frank
Click to expand...

Hi Frank

who are you taking the bike to for a "thorough service"? Some are much better than others......

Paul LeClair
 
Don't use the choke for any length of time after it starts,
and it should be good to go within a minute or so of starting. Nice and steady till it does warm up though.They can and do foul plugs with too much choke.
Well at least you got a quick spin and know how it does go
 
It's not a Choke on a Dellerto - It's an Enricher.

And once the engine approaches temp - It has to manually seat and seal with your Bar Lever.

You require a perfect cable adjustment and suggest the mechanism sprayed with Red Rust Check.

The Enricher "0" Ring has to be in perfect condition.

If it leaks your in shit.

As for that matter I always play with my Dellorto Enricher Cables to ensure the plungers are seated before every ride.

Breganies tend to run rich at idle, spitting fuel stand off, but love to run lean at Hi-Revs but not too lean pending the main jet.


 
Frank

First if the petrol is coming out the overflow then either the hose aint connected as it should go to a catch tank or the oring which should seal it on the spout is shot.
If it was coming out the cap and running down the inside of the fairing and onto your right exhaust. then the rubber seal around the cap is toast.............go one from Wolfgang a good while back for the Californnia bike or you can Frank's Pitstop Motors in Ashfield as early Fiat's used a very similar cap ...........I got one from him years ago... ( another old school shop as it goes )

If it sat for 15 years then was it with or without fuel in it. I note you said that you put in 15 litres as you thought was just about empty.
Does that mean some stale fuel was still in it... after 15 years would be way way stale.
Lav's dont like stale fuel and also the inside of your fuel bowls would be well lets say ugly at the least.

Here's what I think you should do and reckon a bloke like you ( though never met ya ) would be able to do some simple things after all they are Dellorto's and are same as Ducrappy and Guzzi used back in the day... Also Check the breather hose and make sure its connected. .
Drop the fuel bowls off and see how much growth and crud are in there. Drop out the slow speed jets and have a squiz maybe they are blocked.
If you feeling more adventurous then remove the tank ( though now with 15 litres will be a bit heavy ) as now you own one your gunna have to learn how to remove it at some time  :o there is a knack I can do it very quickly these days... and check the balance hoses across the carbs as these also get old and can crack.. you also whilst its off want to check the fuel enrichment ( chokes ) cable cover rubber grommet's there probably cracked and perished too.
With the tank off, again with 15 litres a bit of an issue you should drop out the fuel taps and see what crud is on the filters there.
Oh and if the bike has sat for 15 years then you are up for a new air filter too I would guess. I go with paper ones.. very hard to find but can be had... or the NSW club has foam jobbies which are OK

Where in Sydney are you located ??

Cheers and good luck
Catch tank hose... and yes correct original was black plastic but it split and died years ago... ( rivet counter never picked that last audit by the way think the colour had done him in )

vent%20hose_zpsh1di9gky.jpg


catch%20tank_zpsfkdm59y4.jpg







 
Whatever your experience is with carburetors, I like Delortto's compared to Webber's, MIC's and heaven forbid Holley's as long it's not an Amal.

Guess what the Breganzie 750 SFC came with ;o)
 
Laverda SF said:
Guess what the Breganzie 750 SFC came with ;o)
Click to expand...
Umm OKO nope, Bing nope... well how about Dellorto flat slides, nope well that leaves well hmm lets see ANAL oops meant to say AMAL 36's if memory serves correctly.
 
Amals are so dirt simple what's the problem? The only thing that goes wrong with them is they wear pretty quickly. It's not like there are air jets and pumps to fiddle with. Kind of a one size fits all and they work ok, sorta.
 
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