Ineffective blipping!
 

Recently, since the temperature really dropped, my bike's got a few issues. Firstly, it feels a bit like it's dropping to one cylinder at low revs but as soon as the revs are up, all's well. :?
It's also stalling at standstill.
Another thing is that blipping for downchanges is useless, this has been a bit of an issue since I put the new can on & took out the baffle, there seems to be a pause before anything happens, more so in the cold.
Any ideas? I have it in my head that putting the baffle back in will improve things, is this likely and if so, why? Obviously I'd rather keep the baffle out so is there somethiign else I should be changing to counteract this?

Any advice appreciated.

Could be carb icing that's causing the stalling. Adding Pro-FST or something similar to your petrol helps a lot with this.

I thought of that but it's been colder in the past (riding home in the snow) without the problem, is carb-icing worsened by more open pipes?

It's not just the temperature that affects carb icing.
Amount of moisture, air pressure, bad luck, fuel or whatever else you care to mention.

Saying that I'm sure somebody will be along shortly with the exact solution to your problem.

Hmmm, I don't know really. Mine was always OK when it had the micron on it, so I'm not sure.

You're brave riding in the snow! I hate doing that!

In practise, there are 4 factors that effect Carb-icing:

1) Air Temperature
2) Dew Point
3) Carbs
4) How much your crank the throttle!

Points 1 and 2 combine to indicate the humidity; and matters such as air-pressure only become relevant inside the Carb, and really we're talking about the change in air pressure that causes the air's temperature to drop.

Why do I get so attached to this subject... I always seem to end up writing a few paragraphs about it to no avail! ;) Oh well... my understanding of carb-icing is from an aviation point of view. However I am led to believe that due to the construction of the SV's carbs, it can affect the system in ways other than the classical induction icing usually found on carb funnels.

its funny I've been having alsorts of trouble with my bike, which apears to have gone away till today. When it was very cold and a bit damp in the air, though the other days I had been using some fuel treatment. So I wasn't sure which one was related, it just seemed funny that when I stopped using it the problem came back.
But it could have been the fact that its so bloody cold lately and normally I don't ride it in the cold.

Bagazee, I was having similar probs recently and there was some advice on here about turning up the tickover. Mines at 1500 warm and I haven't had a jot of bother since.

i haaaaaaaaaaaaaaaaaaaate the cold. have the same prob on cold damp days, roll on summer.

Hmmm, I may just crank up the idle a bit then, cheers Scoobs. :D

Yup, me too, nearly came off yesterday due to an inch of salt across the road.
Only a few months to go!
:?

Yes I agree with Scoobs, turn up your idle and see if it makes a difference. 1500rpm is a good starting point and then see if you can get away with a little less - different bikes will behave slightly differently largely because the carbs will have slightly different levels of tune/sync.


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fist day i rode my bike it was stalling coming up to jucntions and clutch in stuff had my tick over set to 1000-1100

this is too low its now set at 1300 and happy :D

IIRC mine's at about 1300 but I'll up it to 1500 for until it's a bit warmer.
I'll let you know how I get on..
Cheers folks!

Someone should design a carb-heat system like there is on piston aircraft to redirect some of the engine heat to melt any ice.

I remember when I was doing my pilot training I suffered an EFATO (Engine Failure After Takeoff) in a PA-28 due to carb icing in the middle of summer. The dewpoint depression was about 10 degrees C at a temperature of approximately 18 degrees C - prime conditions for icing. Fortunately I landed back onto the same runway.

Now that I fly the bigger type of silver birds - all we have to worry about is bird strikes and terrorists. ;)


I suppose one other way of reducing carb icing would be to lean the mixture - as an over rich engine means the fuel acts more as a coolant which increases the chance of ice. From what I've read the carbed SV is slightly over rich - maybe this is for longevity and cooling reasons?

-waves as he tootles off into the distance - on his 'orrible pointy" bike ...............with FI ;-)

Smug git :D

Mwahahaha I have a pointy devils bike as well....

Sadly.. the only thing freezing up in this weather are my nads

cARB iCICNG
 

Dont all the carburrated bikes (SVs) have carb heaters, little brass nipple in the bottom of the float chamber from memory and a thermostat in ther LHS wiring loom??????

Yes but they don't seem to work too well.


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My bike has been doing the exact same thing since it became really cold, I even had my throttle freeze open whilst going to work one freezing morning which was frigging nasty, so I tried some fuel additive to stop carb icing and that was problem fixed straight away. I use some stuff from halfords called " Dry Fuel" , comes in a purple bottle , costs about £5 and does two tankfuls.

Upped the idle speed & it's problem solved (assuming that conditions aren't significantly different to yesterday).
Cheers Scoobs. 8)

No worries