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Author Topic: Why Does My Honda CL200 Only Run With Very Advanced Timing?  (Read 1025 times)

Offline Classic5

  • Posts: 27
Re: Why Does My Honda CL200 Only Run With Very Advanced Timing?
« Reply #20 on: Oct 29, 2018, 12:49:45 »
Hey advCo,

I forgot to mention that, sorry. I did soak the floats submerged in water and did not have any leaks. Also, the gas cap not venting is a definite possibility as the bike was in rough shape when I picked it up. I'll try that when I get a little time this week (hopefully tonight).

Offline Classic5

  • Posts: 27
Re: Why Does My Honda CL200 Only Run With Very Advanced Timing?
« Reply #21 on: Nov 01, 2018, 09:41:48 »
Hey All,

I got out a few times the past evening and was able to drive the bike around a little bit and while I can get it to start easily every time and idle, it only likes to idle on the left cylinder. The right one will only fire sporadically and that's when I have the idle screwed all the way in. I've played around with the A/F screw to try to get the low speed jet to start working but haven't had any luck. Additionally, I'm still having the issue where the bike likes to stall out after driving anything over 35 unless I slow down really slowly, then sometimes I can keep it running till it goes back into it's good low speed state. Having the gas cap open did not seem to make any difference and I've confirmed that the air vent in the cap itself is free and clear of debris.

The left side appears to be running just a little bit lean after looking at the plug(just a little bit white on the top of it) which I'm not surprised about since I'm driving around in 40F, but the right side(problem side) seems to be running very rich as every time I take it out it is black, sooty, and wet. I've played around with the A/F screws on each side and didn't get much change. Is this something that can be caused by the floats being just a little bit off?

As far as the coil breaking down is concerned, I've tried to just feel the coil to see if it feels hot and it's quite cool from the outside. Is this a good way to test? It's a brand new coil.

Thanks!

Offline advCo

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Re: Why Does My Honda CL200 Only Run With Very Advanced Timing?
« Reply #22 on: Nov 01, 2018, 10:10:45 »
Yes, it can be caused by having float heights incorrect. Make sure they are both set at the same height (at whatever the manual says - I can't remember off the top of my head). Have you synced the carbs? On these carbs you basically just visually make sure that the slides are closing at the same time, or that they are fully open at the same time. It can be pretty tricky but this could definitely be causing the problem.

For the ignition, swap your plug wires to opposite sides and see if the problem follows.
« Last Edit: Nov 01, 2018, 10:13:00 by advCo »
"He broke the mirrors off his Cadillac, 'cause he doesn't like it looking like he looks back."

74 CB360 - Luna - http://www.dotheton.com/forum/index.php?topic=63294.0 - Sold
82 GS550L - Tracker-ish - http://www.dotheton.com/forum/index.php?topic=67229.0 - Sold
74 XL350 - The Turd - http://www.dotheton.com/forum/index.php?topic=70252.0 - Sold
Suzuki FA50 "No-Ped" - http://www.dotheton.com/forum/index.php?topic=71189.0
73 Suzuki RV125 -http://www.dotheton.com/forum/index.php?topic=73875.0
'97 BMW F650st - http://www.dotheton.com/forum/index.php?topic=75732.0

Offline teazer

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Re: Why Does My Honda CL200 Only Run With Very Advanced Timing?
« Reply #23 on: Nov 01, 2018, 10:52:19 »
+1.  Check the float height.  Even better if you can check the FUEL level.  Ask CrazyPJ to sell you a pair of his vacuum connectors and screw them into the drain holes and attach a length of clear plastic hose to each and check the fuel level.

They will function like these https://www.ebay.ie/itm/Carb-Float-Level-Tool-Z1-KZ900-KZ1000-KZ650-GS-1976-80-/282587359506

THis how you use one:
https://www.blasterforum.com/attachments/cleartubetest_zpsebce3a71-jpg.24321/

Offline irk miller

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Re: Why Does My Honda CL200 Only Run With Very Advanced Timing?
« Reply #24 on: Nov 01, 2018, 11:12:19 »
If the cylinders aren't sucking the same amount of air, the carbs won't be synced visually. 

Are you 100% confident your cam is timed correctly?  As in, have you pulled the cover and confirmed that the cam is timed correctly? Being off even one tooth will cause this.

Offline advCo

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Re: Why Does My Honda CL200 Only Run With Very Advanced Timing?
« Reply #25 on: Nov 01, 2018, 11:37:15 »
Good point. I think when I was having this same issue on our CB200, it ended up being a minor vacuum leak.
"He broke the mirrors off his Cadillac, 'cause he doesn't like it looking like he looks back."

74 CB360 - Luna - http://www.dotheton.com/forum/index.php?topic=63294.0 - Sold
82 GS550L - Tracker-ish - http://www.dotheton.com/forum/index.php?topic=67229.0 - Sold
74 XL350 - The Turd - http://www.dotheton.com/forum/index.php?topic=70252.0 - Sold
Suzuki FA50 "No-Ped" - http://www.dotheton.com/forum/index.php?topic=71189.0
73 Suzuki RV125 -http://www.dotheton.com/forum/index.php?topic=73875.0
'97 BMW F650st - http://www.dotheton.com/forum/index.php?topic=75732.0

Offline Classic5

  • Posts: 27
Re: Why Does My Honda CL200 Only Run With Very Advanced Timing?
« Reply #26 on: Nov 01, 2018, 17:58:36 »
Hey Irk Miller,

I can confirm that the cam timing is correct. That was one thing I was very diligent about during reassembly as I was aware how important it is to the overall operation of the engine.

As far as air leaks go, her is what I've done: The carb boots looked good, but with the confusing performance, I coated them in RTV gasket maker to fill any hairline cracks and didn't notice any change. I got new O-rings for the carb and engine mounting surfaces of the boot. I also sprayed WD-40 across all of the cracks and crevasses of the carb mountings including the slide cap and didn't notice any immediate changes in rpms either.

I will go back and make sure the carbs are as synced as I can make them. Would syncing the height at rest and then pinching a zip tie or stick in the carb under each slide and then watching for them to move in unison when I twist the throttle be a good way to ensure they are synced?

I'm also going to invest in a set of drain plug tubes so that I can see where the gas levels are compared to each other.

Thank you again for all your help!

Offline Classic5

  • Posts: 27
Re: Why Does My Honda CL200 Only Run With Very Advanced Timing?
« Reply #27 on: Nov 08, 2018, 23:52:15 »
Hey All,

The snow started to fly this week which means that the season is officially at it's end. I did however finally manage to get some time in the garage and was trying to sync the carburetors when I noticed that the cut away on the slides wasn't matching the same direction. After taking them out it appeared that I have two left side slides, as the cutaway faces the air cleaner on the left side but then faces the engine on the right side. Is that a thing? Do I have the wrong slide? I can only imagine this is a big contribute to my issues.

Thanks!

Offline teazer

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Re: Why Does My Honda CL200 Only Run With Very Advanced Timing?
« Reply #28 on: Nov 09, 2018, 03:09:39 »
Glad you found that.  Yes it's a thing.  Slides are usually "handed" left and right to make it easy to adjust them.  Aftermarket carbs, not so much.  It is very possible that someone damaged a slide and bought one not realizing that they are different.

Try to get a new slide and see how much that improves things - I suspect it will be like night and day difference.

Offline Classic5

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Re: Why Does My Honda CL200 Only Run With Very Advanced Timing?
« Reply #29 on: Nov 09, 2018, 13:21:02 »
Hey Teazer,

That's awesome to hear. I'm really optimistic that this will help to solve my issues. One quick question before I pull the trigger on a new part. The slides that I pulled out of the carbs both say 155 and then 2.5 on them. I think the 2.5 is the cut away size, but what does the 155 mean? I only ask because the one i'm looking at say 156 and 2.5 in the picture.