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Author Topic: 1972 cb/cl 100  (Read 26052 times)

Offline JB77

  • Posts: 231
Re: 1972 cb/cl 100
« Reply #60 on: May 30, 2015, 14:38:52 »
Thanks Trek, I plan to rip the carb apart this weekend, and clean the jets again.

Offline JB77

  • Posts: 231
Re: 1972 cb/cl 100
« Reply #61 on: May 30, 2015, 16:31:20 »
Took the carb apart and found the main jet sitting at the bottom of the bowl. Must have shook loose. I cleaned it, and screwed it back in. Going to see what happens after nap.

Offline WhyNot

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Re: 1972 cb/cl 100
« Reply #62 on: May 30, 2015, 16:52:16 »
Good job, hope it works......


What's with the naps......are you and trek that old........ ??? ;D.....or young?
« Last Edit: May 30, 2015, 16:58:10 by budlite282 »
2006 Harley Davidson Heritage Softail
1975 Honda CB750K5 needs carb work
1974 Honda CB350F2 needs tins painted exhaust
1972 Honda CB175K2 roller no engine
1972 Honda CB/CL350 Engines need roller
1972 Honda CB100K2 needs kicker shaft
1990 Mitsubishi MM needs engine rebuild

Offline JB77

  • Posts: 231
Re: 1972 cb/cl 100
« Reply #63 on: May 30, 2015, 16:58:06 »
My kids are napping. I work on bike during nap, but can't make a lot of racket, light sleepers.

Offline JB77

  • Posts: 231
Re: 1972 cb/cl 100
« Reply #64 on: May 30, 2015, 18:28:27 »
No go today. Checked the spark plug, it was black. So I cleaned it checked the gap and tried again. It turned over and tried to start once, got a couple putters and a puff of smoke, then nothing. Giving up today. Going to dinner with the wife.

Offline trek97

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Re: 1972 cb/cl 100
« Reply #65 on: May 30, 2015, 18:41:37 »
Well that just blows,  I hate that.  This bike was running before correct?  Was it hard starting then?
Install a new plug. 
Check timing. 
Set idle speed (slide height to just a little crack open), then set A/F mix to 1.5-2 turns out from bottom. 

Offline JB77

  • Posts: 231
Re: 1972 cb/cl 100
« Reply #66 on: May 30, 2015, 18:43:25 »
It was running a couple weeks ago. It took a while to start, and had to keep throttle open to keep it running. Now nothing. I'll try that tomorrow.

Offline trek97

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Re: 1972 cb/cl 100
« Reply #67 on: May 30, 2015, 18:52:53 »
In the pics you posted.  I dont see an Air/Fuel mix adjuster.  Is it on the frame (left) side of the carb?

Offline JB77

  • Posts: 231
Re: 1972 cb/cl 100
« Reply #68 on: May 30, 2015, 21:08:21 »
Nope, motor side. From what I read, it says treat it the opposite of the air adjuster on frame side.

Offline JB77

  • Posts: 231
Re: 1972 cb/cl 100
« Reply #69 on: May 30, 2015, 22:23:50 »
I bought a new plug and installed before I had it running from the interweb. I read any ngk plug from a hardware store will work. Is this true? I don't have a spare right now, the new plug is the one that I cleaned today.

Offline Redliner

  • Posts: 1176
Re: 1972 cb/cl 100
« Reply #70 on: May 31, 2015, 03:32:31 »
Any matching plug to the original requirement will work. I think the 100 uses the thinner plug so it would be NGK code D8EA. Cross that number to other manufacturers and any matches will be fine. The D means it's 12mm thread, 8 is the temperature that the plug should maintain, and the others are fuzzy but I think the A means is a copper core or something, not really important just make sure you don't deviate. For instance, a DR8EA will muck things up.
I'm pretty sure I'd know if I were being manipulated by some overwhelming, mesmerizing, quasi-divine entity anointed by its own cult of personality. Nobody could be that stupid. So who's ready for the Super Bowl?

Offline JB77

  • Posts: 231
Re: 1972 cb/cl 100
« Reply #71 on: May 31, 2015, 09:30:49 »
Thank you.

Offline JB77

  • Posts: 231
Re: 1972 cb/cl 100
« Reply #72 on: Jun 01, 2015, 22:01:50 »
Picked up a new plug today, local store had it for $2.49. Super happy about that. I'll recheck things and see what happens tomorrow.

Offline JB77

  • Posts: 231
Re: 1972 cb/cl 100
« Reply #73 on: Jun 03, 2015, 17:22:29 »
Recleaned the carb the jets and bowl, mixed in some new gas in the tank, new plug in, and a squirt of starter fluid and she ran. She's rough and bogs down if giving too much throttle. Haven't gotten her out on the road yet. Had the idle set pretty good, then she stalled. I'm now letting her sit for a few before I try again. Guessing I need to pull the complete Carb apart to make sure there is nothing gunked up in there somewhere.

Offline trek97

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Re: 1972 cb/cl 100
« Reply #74 on: Jun 03, 2015, 22:55:50 »
did you check point gap and static timing?  If you can keep her idling for a bit check timing w strobe light.


Park her w exhaust pointed towards sun, on a "no breeze" evening.  When she starts to bog on throttle, watch exhaust for black smoke.  Black smoke says shes too rich and need to jet down.  Or keep her bogging for a bit.  Then check plug.  If its cleaner and white, shes too lean.  black plug = rich.

« Last Edit: Jun 03, 2015, 22:58:51 by trek97 »