Flooding Dellortos (for a novice).

V

verdelaverda

New member
Hi guys,

I recently shipped an SFC1000 from the UK.

The bike was serviced and running well before it left the UK (tank was drained).  However, the fuel I put in the tank at this end runs straight through the carbs to the overflow pipe at a flow rate that must be similar to that running through the fuel taps.  I cant see any gumming in the fuel bowl or anywhere else.  The floats seem OK (visual inspection only so far) and fuel valves look to be working. The carbs are the original type (Dellorto PHF 32 DD). 

I know that our Oz fuel also makes a good sheep dip and I expected the carbs could need some retuning but this has got to be something else. I am a novice at this so it is possible that I am missing something simple and basic.

Any suggestions would be welcome. 

Rob.
 
Float may be jammed down from sitting empty. Switch the fuel on and give the bowls a tap see if that stops it in the first instance.


    Keith
 
Had a similar experience with one carb a couple of years ago, Keiths spot on ,tap method did the job.

Shaun
 
it's coz the bike is in Oz and it's upside down.  You need to reverse the floats from UK fitment
 
Make sure the bores aren't filled with fuel before hitting the starter button or a leaking carby will be the last of your problems!!
Another Rob, from WA
 
laverlesmains said:
it's coz the bike is in Oz and it's upside down.   You need to reverse the floats from UK fitment
Click to expand...

It's just having a little winge as soon as it got off the boat, when you consider it's previous home it'll make sence.
 
Yea Rob, wot Rob said. Turn the motor over without plugs in to ensure bores are clear prior to 'real' start..

8)
 
with the ignition feed disabled, you dont want any sParks, as non earthed (but sparking) plugs may well bugger your ignition, as well as your fire insurance.
CLEM
 
Rob, in short: Turn off the fuel, Whack the crap out of the carbs, take the plugs out, diconnect the coils and test the starter motors capabilities. Put plugs back in, hook coils back up, open fuel taps , whack the bejesus out of the carbs again, turn on ignition, and lots of choke - no throttle, hit the little button on the r/h switchblock and ................. reort back  :D
 
"Whack the crap out of the carbs" "whack the bejesus out of the carbs again" "hit the little button on the r/h switchblock"

little or big hammer?

I can see the report back.....

Two lots of whacking and no progress.
After I collected the carbs from where they landed after they flew across the garage it looks like I will need some new ones all cracked and broken, Oh and that "little button" it's broke as well................ :D

 
Hey now I can see people here will use any excuse for a bit of whacking but didn't you say you the floats seem ok? If you've had the bowls off and checked that the floats move freely, no amount of whacking will sort this out.

You could connect a pipe to the carb fuel line connector, blow into it then lift up the float and make sure the air flow shuts off just to be sure the needle valves are sealing.

It really doesn't take much to get the carbs off - given the problem it would be worth cleaning out the jets and setting the float height at the same time.
 
chriskay said:
[It's just having a little winge as soon as it got off the boat, when you consider it's previous home it'll make sence.
Click to expand...

No, no, no.  It got off the boat after being 'transported', realised where it was and wet itself.  And can you blame it?  I mean, the slightest problem, and the advice is, hit it, whack it, beat the bejesus out of it............it will be scared sh*tless by now!

 
 
They are under the little veranda.

As an extra tip; get some rubber and cut it out like a key (x 3) put some bright coloured string through all three and use each rubber on top of the breather and under the veranda, this stops water from going down the breather hole, especially if you're using high pressure washer.

What's that you say?? Whats the sting for?? To keep all three together when you hang em back up in the garage, and the bright coloured string is to remind you to remove them after cleaning.

This tip was brought to you by a Sydney Swans supporter.
 
Jota1981 said:
Hi , The float chambers have breathers. Check these are not blocked.
Cheers
Click to expand...
I had an over flowing carb on my RGS that I traced to a plugged bowl vent. Not the plastic hose but in the carb fitting. If the bowl vent is plugged it does not allow the float valve to seat. I discovered this after whacking, new float valves, checking for stuck floats and setting float height did not solve the problem. It was not a small leak but a full flow. The other two carb vents were partially plugged.

Art
 
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