Author Topic: cb125 (Read 6056 times)

nk140 · « **on:** December 28, 2011, 07:48:31 AM »

I will be picking up a cb125 in the next few weeks. Turns out my uncle had this bike and parked it in my Gpa's garage in 1983 when he was a senior in high school and it has never moved since. I didn't even know it was there until Xmas and my uncle wanted to know if I wanted to have it. It is missing the tank and seat though. The motor is free. I will post some pics once I pick it up.

Coyote13 · « **Reply #1 on:** December 28, 2011, 10:39:42 AM »

Sweet find, if you need any inspiration look into ffjmoore's build threads. He's done some pretty awesome stuff with the little guys.

nk140 · « **Reply #2 on:** December 29, 2011, 06:20:28 AM »

Quote from: CoyoteUSP on December 28, 2011, 10:39:42 AM

Sweet find, if you need any inspiration look into ffjmoore's build threads. He's done some pretty awesome stuff with the little guys.

His threads are my inspiration. I don't know if I will cafe the bike though. It may be just a resto.

grcamna2 · « **Reply #3 on:** December 30, 2011, 01:36:18 PM »

I look forward to watching your restoration project..subscribed.

nk140 · « **Reply #4 on:** February 22, 2012, 09:13:14 AM »

Well I got my 125 last weekend. Turns out it is a 1974 CL125s.

The good:
The bike has about 135 psi of pressure so it should be fine.
Clean title
Side covers were in great shape.

The bad:
I am in need of either a cb or cl tank.
CB or CL seat.
The carb slide is locked solid. Anyone know a way to break it free. I having it soaking in a carb bath right now.

grcamna2 · « **Reply #5 on:** February 22, 2012, 10:54:21 AM »

nk140,
PBBlaster will do it. I have a decent used carb I can let you have for $12 w/ slide for my past CB125.

nk140 · « **Reply #6 on:** February 23, 2012, 05:03:38 AM »

Quote from: grcamna2 on February 22, 2012, 10:54:21 AM

nk140,
PBBlaster will do it. I have a decent used carb I can let you have for $12 w/ slide for my past CB125.

Well the slide broke free after I removed it from the carb dip. I will keep you in mind if somehow this one doesn't work out.

hoodellyhoo · « **Reply #7 on:** February 23, 2012, 06:06:17 PM »

I have a CL125 tank. I'll try and get you pics this weekend.

nk140 · « **Reply #8 on:** February 24, 2012, 06:37:48 AM »

Quote from: hoodellyhoo on February 23, 2012, 06:06:17 PM

I have a CL125 tank. I'll try and get you pics this weekend.

Thanks. I can only find cb tanks on ebay. I about pulled the trigger on one last night. PM me and I will send you my email for pics.

nk140 · « **Reply #9 on:** March 03, 2012, 10:09:53 AM »

After some tinkering and rebuilding the carb the bike is finally running. Now to tear it down and start cleaning it up a bunch more.

grcamna2 · « **Reply #10 on:** March 03, 2012, 11:12:04 AM »

I listened to you're vid. It's good to finally get her running

;I would adjust the cam chain and valves & clean the oil filter & screen w/ a nice oil change if it was mine.Did you're baffles blow out

?

nk140 · « **Reply #11 on:** March 03, 2012, 02:49:32 PM »

Quote from: grcamna2 on March 03, 2012, 11:12:04 AM

I listened to you're vid. It's good to finally get her running ;I would adjust the cam chain and valves & clean the oil filter & screen w/ a nice oil change if it was mine.Did you're baffles blow out ?

I did check the valves and clean the oil screen. I used oil from my 600rr race bike because i am taking the motor out of the frame to clean and repaint everything. I do need to adjust the cam chain though and readjust the valves since the intake was a little loose before getting it going again. The bike will need a new exhaust. The muffler has separated at the seam on the top. You should have seen the old mouse nest and poo that came out of the muffler.

grcamna2 · « **Reply #12 on:** March 03, 2012, 03:42:02 PM »

That's the O.E. CL125 exhaust on there,right? maybe you could have someone weld it up and find a baffle that would be similar to the original so you wouldn't have to re-jet the carb..or Ebay;those Original Cl125 exhaust's are very rare indeed.

nk140 · « **Reply #13 on:** March 03, 2012, 08:06:29 PM »

Yeah it is the original exhaust. I may see if I can find a buddy that has a welder. I cannot find a CL125 exhaust anywhere not even a Chinese knockoff.

grcamna2 · « **Reply #14 on:** March 03, 2012, 08:42:16 PM »

With a a good bit of research &...some trial & error you'll be able to get a certain kind of Repro. baffle(maybe find a pic off of a parts diagram ?)or close match to fit in the end to gain all the low end & midrange power w/ similar jetting.

nk140 · « **Reply #15 on:** July 13, 2012, 05:50:38 AM »

Anybody know where to find a 6v tail light?

madScientist · « **Reply #16 on:** July 13, 2012, 09:08:06 AM »

Check out partnmore. I get a lot of stuff from there and it's always been pretty good.

http://www.partsnmore.com/parts/honda/

Btw...i also have a 74 cb125s...sure it's not as fast as the cb750 but i have found it's impossible to ride it without a big stupid grin on my face...i love that little thumper...

nk140 · « **Reply #17 on:** July 13, 2012, 11:05:42 AM »

Quote from: madScientist on July 13, 2012, 09:08:06 AM

Check out partnmore. I get a lot of stuff from there and it's always been pretty good.

http://www.partsnmore.com/parts/honda/

Btw...i also have a 74 cb125s...sure it's not as fast as the cb750 but i have found it's impossible to ride it without a big stupid grin on my face...i love that little thumper...

No 6v lights that I can see. What is everyone else using for 6v cafe tail light?

kirkn · « **Reply #18 on:** July 14, 2012, 05:13:12 PM »

Voltage is all in the bulb itself! Get whatever light assembly floats yer boat, then swap in a 6-volt bulb from the local autozone.

nk140 · « **Reply #19 on:** August 07, 2012, 11:32:18 AM »

Got my 125 mostly together besides the lighting. I got it running but it is running very rich. I am running a pod filter and an open header. The main jet is a 105, but stock is 98. Does anyone know where to find a 98 jet? I thought I found one on ebay but it turns out it is for a cl125a and won't work for with the 1973 cl125 carb.

kirkn · « **Reply #20 on:** August 07, 2012, 12:14:10 PM »

Sudco or JetsRUs online.

nk140 · « **Reply #21 on:** August 07, 2012, 12:21:26 PM »

Quote from: kirkn on August 07, 2012, 12:14:10 PM

Sudco or JetsRUs online.

no main jets listed on JetsRUs. Would a main jet for a cb175 work?

nk140 · « **Reply #22 on:** August 15, 2012, 05:24:35 PM »

Does anyone have a cl125 or cb125 carb that I can borrow? My bike will only run full choke and runs very rich as well. I have tried cleaning everything out and tried to find a vacuum leak to no avail. I just need to rule out things. If you have any advice I would be grateful.

Flying J · « **Reply #23 on:** August 17, 2012, 08:23:39 AM »

open your exhaust search up to include cl100. I am pretty sure they are the same.
http://www.ebay.com/itm/Honda-CL100-CL-100-Exhaust-Muffler-System-/230833956971?pt=Motorcycles_Parts_Accessories&hash=item35bec6a86b&vxp=mtr#ht_1451wt_952

I never found a decent 6v tail light but searching ebay it seems there is more out there then a few years ago. Some scooters were 6v also golf carts and some old cars. Is this a cafe a restore?

http://www.ebay.com/itm/Motorcycle-DELUXE-Tail-light-Assy-STOP-SS-RIGHT-6-VOLT-/330682933406?hash=item4cfe3d209e&item=330682933406&pt=Motorcycles_Parts_Accessories&vxp=mtr#ht_2118wt_952

As for the carb. how is your float level? Are the flaots leaking? Every 125 i have taken apart had bad floats. That will make your bike run rich for sure.

nk140 · « **Reply #24 on:** August 20, 2012, 11:39:19 AM »

Quote from: ffJMoore on August 17, 2012, 08:23:39 AM

open your exhaust search up to include cl100. I am pretty sure they are the same.
http://www.ebay.com/itm/Honda-CL100-CL-100-Exhaust-Muffler-System-/230833956971?pt=Motorcycles_Parts_Accessories&hash=item35bec6a86b&vxp=mtr#ht_1451wt_952

I never found a decent 6v tail light but searching ebay it seems there is more out there then a few years ago. Some scooters were 6v also golf carts and some old cars. Is this a cafe a restore?

http://www.ebay.com/itm/Motorcycle-DELUXE-Tail-light-Assy-STOP-SS-RIGHT-6-VOLT-/330682933406?hash=item4cfe3d209e&item=330682933406&pt=Motorcycles_Parts_Accessories&vxp=mtr#ht_2118wt_952

As for the carb. how is your float level? Are the flaots leaking? Every 125 i have taken apart had bad floats. That will make your bike run rich for sure.

Thanks for the exhaust info. I will be on the look out some more.

I will look into the other 6v options. It is for a cafe style bike since everything was missing except for the frame, wheels, and motor.

I did fix the carb float with some JB weld on one lobe. Works now. I figured out the problem last night. The timing plate was put in 180* out of phase. I am surprised that bike even ran with it like that.

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Author Topic: cb125 (Read 6056 times)