Topic: CycleX carb system and Idle

[mlinder]

Hey folks,
Finally getting the old girl running, and started her up today.
Firing on all 4, prretty damned smooth, however, the old girl idles at about 2.8k

The idle screws don't seem to do much of anything. seriously, like nothing.
What I'm running:
CycleX twin carb setup.
Unkown 4 into 1 exhaust (haven't seen another one like it, actually)
New plugs (autolite 4163, supposedly the d8ea equivalent.)

So, apart from the high idle (and amazingly stiff throttle action, or mebbe I'm a puss), it runs well, revs up to 6 or 7 k smoothly, and has good throttle response.

What am I missing here, as far as idle is concerned?
Only thing I can think of is that perhaps the carbs are not closing completely. I'll have to check that tomorrow.

[mlinder]

#$%*, meant for this to go in the real forum :/

[ElCheapo]

Contact them, They will walk you through the goods right on the phone. Great bunch of guys that will help you will all of your questions unlike some sellers.

[sparty]

Sounds to me like your throttle cables aren't adjusted correctly... possibilities:  Your throttle cables are too short preventing the slides from closing fully or you have the cables hooked up to the carbs incorrectly.  You mentioned that the throttle was stiff, you therefore have something incorrectly hooked up.

Sparty

[mlinder]

Sounds to me like your throttle cables aren't adjusted correctly... possibilities:  Your throttle cables are too short preventing the slides from closing fully or you have the cables hooked up to the carbs incorrectly.  You mentioned that the throttle was stiff, you therefore have something incorrectly hooked up.

Sparty

That's what I'm thinking too. Like I said, runs beautifully cept for idle. No stumbling, racing, anything. Smooth and nice.

[Pinhead]

Do those carbs have a fast-idle setting when it's choked? I've wanted to try the twin-carbs since I saw them a while back. Once you get it up and going the way it should, be sure to post some pics! I'm really looking forward to hearing first-hand how well they work.

[mlinder]

Do those carbs have a fast-idle setting when it's choked? I've wanted to try the twin-carbs since I saw them a while back. Once you get it up and going the way it should, be sure to post some pics! I'm really looking forward to hearing first-hand how well they work.

I do believe so, yes.
I think everyone who has mentioned that the cables are not adjusted properly are probably correct. When the throttle is closed, there is a good 3/8 to half an inch clearance between the bottom of the slide and the throat of the carb.

[Jinxracing]

When the throttle is closed, there is a good 3/8 to half an inch clearance between the bottom of the slide and the throat of the carb.

That's probably the problem then. Looking at the instruction booklet that came with my set, it says that there should be a 1mm gap between the bottoms of the slides and the carb bore when viewed from the back side. Have you tried slacking off all of the cable adjustments?

I'm looking forward to hearing how these work out for you too...I haven't installed mine yet.

[mlinder]

I don't have a day off till next Sunday, so won't be able to till then, but yes, that is what I will do.

[heffay]

i would suggest oiling your throttle cable (they sell a great little tool for that)
don't just slack off your cables UNTIL you figure out why it is binding.  if the throttle control is stiff there is something wrong with your routing.

that was a period after routing 

[mlinder]

i would suggest oiling your throttle cable (they sell a great little tool for that)
don't just slack off your cables UNTIL you figure out why it is binding.  if the throttle control is stiff there is something wrong with your routing.

that was a period after routing 

It doesn't really feel like it's binding. Just feels pre-loaded. WHich makes sense, since it' not being allowed to close as much as it should. the springs are loaded from closed throttle, which should be fixed by adjusting the cables. I mean, it snaps closed easily and very quickly from full throttle.

[heffay]

yes... in that case.  it probably is just preload. 

carry on 

[Jinxracing]

I put mine together for mockup, and noticed that the carbs' internal springs seemed awfully stiff. I'm hoping that with a grip on the throttle tube it will get a little easier to twist.

[mlinder]

I put mine together for mockup, and noticed that the carbs' internal springs seemed awfully stiff. I'm hoping that with a grip on the throttle tube it will get a little easier to twist.

Well, these carbs are kinda designed for single carb setups, far as I can tell, so we have twice the spring action. Might see if a 'softer' spring does the trick if this one is too much of a pain.

[MRieck]

I put mine together for mockup, and noticed that the carbs' internal springs seemed awfully stiff. I'm hoping that with a grip on the throttle tube it will get a little easier to twist.

Well, these carbs are kinda designed for single carb setups, far as I can tell, so we have twice the spring action. Might see if a 'softer' spring does the trick if this one is too much of a pain.

Something else has to be available. Sudco would know

[mrbreeze]

I bet you figure it out shortly after you look at it. It should be pretty straight forward.

[brimar6]

I think your on the right track. But like elcheapo said give Cycle Exchange a call, they are great to deal with an I'll bet they've seen it all with these carbs.