Is it possible to adjust idle mixture on CV carbs?
This is impractical for bikes with CV carbs, since the effects of the needed ¼ to ½ turn adjustments to one idle mixture screw are imperceptible to ordinary mortals.
Can a 600 cfm carb set curb idle?
Still having the same problem. The carb idles fine while warming up, but when choke is open & engine is hot, still cannot set curb idle.
What should idle speed be on Weber carburetor?
CARBURETOR SET UP AND LEAN BEST IDLE ADJUSTMENT Proper idle jets are very important to a Weber’s performance ( this assumes there is no vacuum leaks or other carb problems check here) Idle Speed Screwshould be no more than 1 1/2 turns in (Fig 1) Poor Idle Good Idle Mixture Screw Less than 1 turns out
Why are idle mixture screws useless on an 80457s?
If so, you’ll need to open the secondary blades a little bit, in order to close the primary blades (to maintain desired idle speed). When the idle transfer slots are exposed too much, it renders the idle mixture screws useless. Then view the “Idle Mixture Screws” video. View all their carb tuning videos.
This is impractical for bikes with CV carbs, since the effects of the needed ¼ to ½ turn adjustments to one idle mixture screw are imperceptible to ordinary mortals.
What’s the idle setting on a Weber carburetor?
To confirm settings with the engine running. Start by screwing in the mixture screw and count the number of turns it takes to bottom out and note if the engine dies. If Idle Mixture screws are with in ½ turn of base line setting then all is well and have fun.
Which is the correct size of idle jet screw?
Go down on the primary idle jet Mixture Screw more than 2 turns out Go up on the primary idle jet Mixture Screw between 1 and 2 turns out Primary jet is correct size It is important to follow all linkage and lever installation instructions.
What do you use to adjust idle speed?
What I’m trying to adjust the idle with is the curb idle adjusting screw: The Holley tuning video says “the curb idle adjusting screw sets the idle speed by opening and closing the primary throttle plate”. I did not adjust any screws that are internal to the carb, and in fact have not had the carb removed.
Can a CV carb get a Sportster to idle?
I recently replaced the accelerator pump and enricher on my 02 sportster with a cv carb. Now I can,t get it to idle unless I have the enricher pulled partially out.
Why does carb cough, CV, just off idle?
Checked the enricher early on, along with carb seating. Even replugged the air/gas mix screw access hole (chewing gum) because the dealer told me that it could be sucking a little wind through there. But it didn’t come together until I changed the jet. Difference is amazing.
Why is my Harley CV carburetor stalling after tuning?
Hesitation or stalling can sometimes occur after tuning or rebuilding your Harley CV carburetor or if your Harley carb has not been maintained. The following are common issues sometimes encountered after tuning or rebuilding a Harley CV carburetor.
I recently replaced the accelerator pump and enricher on my 02 sportster with a cv carb. Now I can,t get it to idle unless I have the enricher pulled partially out.
What are the symptoms of a carburetor air leak?
An increased and steady idle speed can be one of the best warning symptoms for detecting a carburetor air leak. If attempts to turn down the idle speed adjusting screw have failed (old-make carburetor), it means the blend of air to fuel ratio has changed in favor of too much air passing into the intake manifold.
Why does my car run at too much idle speed?
If attempts to turn down the idle speed adjusting screw have failed (old-make carburetor), it means the blend of air to fuel ratio has changed in favor of too much air passing into the intake manifold. This leans out the fuel mixture which raises the engine speed. The change could be as noticeable as twice the normal engine idle speed.
Why do the Revs go up when the throttle is off?
As you slowly turn it out it should begin to idle smoother and the idle speed should come up. If you have the correct pilot jet then before you get to 3 turns out on the fuel screw the idle will go up, peak, then start to slow down again. Set the fuel screw near where it idles the best.
Why does carb Stix bounce up and down at idle?
That carb stix would just bounce up and down as the engine loped at idle. Thanks krusty, your a veritable cornucopia of information. The factory
Can a bike idle perfectly all day long?
It will idle all day long at idle, even a very slow idle…but when you hit the throttle….nuthin……blaaaaaaaaaa then it will idle perfectly again. I am running K N aftermarket air breathers. same prob on or off
What are the symptoms of rich carb settings on a motorcycle?
Rich Reduced Power – It has less power but seems to be OK and runs. Reduced Fuel Mileage – Your using more fuel per cycle so your mileage becomes worse. Rough Idle – Combustion takes a just a bit longer with more fuel and at lower RPM’s the engine can idle rough.
What are the symptoms of lean idle on a motorcycle?
Spark plugs are clean – No residue. Insulator may be white. Runs better at higher altitudes – AFR becomes normalized due to reduced atmospheric pressure allowing fuel into the venturi easier. Backfires – Popping on deceleration for a lean idle circuit or backfires in general.
Why does my Eddy 1406 carb keep popping?
I’ve checked the timing and that’s fine, I’ve even swapped carbs (from an Eddy 1406 to a Holley 3310-3), but the popping persists. So I’ve come to the conclusion that this must either be a compression issue or a cam issue, or something else I’m just not thinking of.
When does the carb pop during engine compression?
Popping/crackling through the carb during acceleration, cam, compression, or what? Discussion in ‘ Engine Topic ‘ started by Penix, Feb 14, 2009 .