Lil' CB350 Can't Get it Right! - Page 2

blaine.hale · 08-20-2012, 08:25 AM

Quote:

Originally Posted by ThadeusVenture

hmmm . . . these are slide carbs . . . so the one that is too hot has the sticking slide? Could check to see if something is making it stick . . .

It's quite the plausible situations. There's also the cables to consider. It could also be a clogged jet on one side or they're just terribly out of sync. At any rate, I'd give the carbs a good go before moving to other things.

Al Tuna · 08-20-2012, 08:33 AM

If the right side is rich and fowling plugs the plug will not recover without a good cleaning and dry out. I suggest picking up new plugs to rotate in until you get it tuned.
I am suspecting carb sync and idle jet circuit still dirty. Providing you are sure of the timing, spark to both cylinders and fuel flow.

Give us a description or pic of the plug colors.

anonny · 08-20-2012, 08:24 PM

Measure how high the carb slide is off the bottom of 1 of the carbs and see if the other measures the same which should give you a rough and dirty synchronization if you don't have any other sync equipment.

Just find something that will just fit under the slide such as a drill bit.

ThadeusVenture · 08-20-2012, 08:57 PM

Quote:

Originally Posted by blaine.hale

It's quite the plausible situations. There's also the cables to consider. It could also be a clogged jet on one side or they're just terribly out of sync. At any rate, I'd give the carbs a good go before moving to other things.

Smart! I'll give that a try. The cables are new, but as I mentioned there's a sharp bend under the tank, so maybe I should find a better way to route them.

ThadeusVenture · 08-20-2012, 08:58 PM

Quote:

Originally Posted by Al Tuna

If the right side is rich and fowling plugs the plug will not recover without a good cleaning and dry out. I suggest picking up new plugs to rotate in until you get it tuned.
I am suspecting carb sync and idle jet circuit still dirty. Providing you are sure of the timing, spark to both cylinders and fuel flow.

Give us a description or pic of the plug colors.

Good tip. I did look at them when I gave up last night, and it was wet. I have an extra set.

I will get a picture when I give this another go tomorrow.

Thanks, everyone.

dan-c · 08-21-2012, 07:12 AM

IIRC the owners manual says to turn down the idle screw on one side until that side quits, then adjust the other side to a slow idle then repeat. Fine tune as necessary with the idle screws.

blaine.hale · 08-21-2012, 07:15 AM

Quote:

Originally Posted by dan-c

IIRC the owners manual says to turn down the idle screw on one side until that side quits, then adjust the other side to a slow idle then repeat. Fine tune as necessary with the idle screws.

That's generally a good tip for syncing any carbs if you don't have a manometer. I use that one a bit :)

ThadeusVenture · 08-22-2012, 04:58 PM

Well . . . checked timing again. Spot on. Checked valve clearances--in spec. Everything is in order. Cables are adjusted properly. Slides in sync. Rode it around the block a few times, but I still can't get it to idle. I suspect maybe the pilot circuit is not jetted properly. I ordered a set of pilot jets in various sizes #25-#50. Will report back when they come in next week . . .

LashLarue · 08-22-2012, 07:40 PM

I have several SL350s and have had similar problems that turned out to be jets. One time I had the jets cleaned by a pro and installed them after a tank cleaning, new lines, clean carb and it would not idle well. I checked everything and finally came back to the carbs and a plugged idle jet. It does not take much to plug them.

Other than that, the cb and cls were always having problems with holes in the rubber diaphrams.

MacNoob · 08-22-2012, 08:20 PM

No one has directed you to hondatwins.net yet? The specialists are there.

ThadeusVenture · 08-22-2012, 09:36 PM

Quote:

Originally Posted by MacNoob

No one has directed you to hondatwins.net yet? The specialists are there.

Yep, I was over there. Got some good information. Seems to be coming down to the jetting.

Lomax · 08-22-2012, 09:39 PM

When you get this all dialed in you can come over and do my CL350, That is if it ever arrives.

Marc

ThadeusVenture · 08-22-2012, 09:40 PM

Quote:

Originally Posted by LashLarue

I have several SL350s and have had similar problems that turned out to be jets. One time I had the jets cleaned by a pro and installed them after a tank cleaning, new lines, clean carb and it would not idle well. I checked everything and finally came back to the carbs and a plugged idle jet. It does not take much to plug them.

Other than that, the cb and cls were always having problems with holes in the rubber diaphrams.

I gave them a quick cleaning with carb cleaner solution and compressed air, since they had been sitting for about 3 years. But before I start the tuning process with the jets, I'll probably take them apart and really give them another cleaning piece-by piece.

I was having trouble with the old carbs, and it was probably the diaphragms. I got these slide carbs because it didn't seem to cost much more than replacing those diaphragms, which are crazy expensive.

BiGR Rich · 08-22-2012, 09:51 PM

Did you ever find out what size the carbs are?

08-20-2012, 08:33 AM	#17
Al Tuna PUI Offender Joined: Nov 2006 Location: Moran Nation Oddometer: 8,305	If the right side is rich and fowling plugs the plug will not recover without a good cleaning and dry out. I suggest picking up new plugs to rotate in until you get it tuned. I am suspecting carb sync and idle jet circuit still dirty. Providing you are sure of the timing, spark to both cylinders and fuel flow. Give us a description or pic of the plug colors. __________________ Southeast Weather Map "I might as well keep going, there's no 'effing way I'm going back the way I came" Moran Nation 21 Club.

08-20-2012, 08:24 PM	#18
anonny What could go wrong? Joined: Mar 2007 Location: Beautiful Revelstoke BC Oddometer: 4,956	Measure how high the carb slide is off the bottom of 1 of the carbs and see if the other measures the same which should give you a rough and dirty synchronization if you don't have any other sync equipment. Just find something that will just fit under the slide such as a drill bit. __________________ Kawasaki H1 build thread 71- 450 Honda CL re & re Just another pathetic sheep following the herd

08-21-2012, 07:12 AM	#21
dan-c Back Joined: Aug 2005 Location: SATX Oddometer: 13,511	IIRC the owners manual says to turn down the idle screw on one side until that side quits, then adjust the other side to a slow idle then repeat. Fine tune as necessary with the idle screws. __________________ "...Carved in stone is a date he had to go on, And another from the moment of his first dawn..." - In Memory of Preston Haun - In Memory of Mike Berlein - In Memory of Amanda Cassady

08-22-2012, 04:58 PM	#23
ThadeusVenture ^OP Adventurer Joined: Apr 2008 Oddometer: 25	Well . . . checked timing again. Spot on. Checked valve clearances--in spec. Everything is in order. Cables are adjusted properly. Slides in sync. Rode it around the block a few times, but I still can't get it to idle. I suspect maybe the pilot circuit is not jetted properly. I ordered a set of pilot jets in various sizes #25-#50. Will report back when they come in next week . . . __________________ "Champagne for my real friends, real pain for my sham friends." -Francis Bacon

08-22-2012, 07:40 PM	#24
LashLarue Gnarly Adventurer Joined: Jul 2009 Location: Dallas Oddometer: 121	jets I have several SL350s and have had similar problems that turned out to be jets. One time I had the jets cleaned by a pro and installed them after a tank cleaning, new lines, clean carb and it would not idle well. I checked everything and finally came back to the carbs and a plugged idle jet. It does not take much to plug them. Other than that, the cb and cls were always having problems with holes in the rubber diaphrams.

08-22-2012, 09:39 PM	#27
Lomax Nanu-Nanu Adventurer Joined: Jul 2004 Location: Westminster Colorado Oddometer: 7,009	When you get this all dialed in you can come over and do my CL350, That is if it ever arrives. Marc __________________ 04 R1150RT,06 KTM 450EXC, 84 R100RS LE, 89 XL600V, 2012 Stelvio, 72 Guzzi Eldorado http://s22.photobucket.com/albums/b327/lomaxcm/?sc=3

08-22-2012, 09:51 PM	#29
BiGR Rich Adventurer Joined: Dec 2011 Oddometer: 28	Did you ever find out what size the carbs are?

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