The most important thing to know at this point is that every carb kit for sale out there has inaccurate brass and other hard parts in them. Did you try loosening the spring-loaded pin in the float needle? It could just be stuck and with a little careful work with needle nose pliers and some penetrant it might loosen the stuck spring. If not, places like JetsRUs and Sirius Consolidated are good sources for accurate replacements.I'm guessing I'll need to purchase a carb rebuild kit to get another one. Is there a trick to refurbishing the old one so that it functions again?
Thank you for the link! I just pulled the carb again and found another issue! It appears the float itself actually takes in fuel. I noticed as I pulled it out that it sound like some fluid was inside of it. The float needle seems to spring back when depressed slightly with a finger. Could the float having a little fluid in it be enough to depress the needle. I guess I'll need to replace the float.The most important thing to know at this point is that every carb kit for sale out there has inaccurate brass and other hard parts in them. Did you try loosening the spring-loaded pin in the float needle? It could just be stuck and with a little careful work with needle nose pliers and some penetrant it might loosen the stuck spring. If not, places like JetsRUs and Sirius Consolidated are good sources for accurate replacements.
The float needle may be okay, but the float itself allowing gas inside it definitely needs to be addressed. Sometimes you can re-solder the seams and stop the fuel leaking into itCould the float having a little fluid in it be enough to depress the needle. I guess I'll need to replace the float.
The float needle appears to work! I switched the good float to the other carburetor and it performed the spring action as it should. I think I've figured out the leaking side of the one bowl based on the sound. I tried submerging it in gasoline to find the leak but I didn't see any bubbles. I'm going to let the gas currently within the float evaporate and then I'll use a hand lense to try and locate the pinhole.The float needle may be okay, but the float itself allowing gas inside it definitely needs to be addressed. Sometimes you can re-solder the seams and stop the fuel leaking into it
It's possible the leak is at a soldered seam on the float, the solder on these is old and can get brittle with age.The float needle appears to work! I switched the good float to the other carburetor and it performed the spring action as it should. I think I've figured out the leaking side of the one bowl based on the sound. I tried submerging it in gasoline to find the leak but I didn't see any bubbles. I'm going to let the gas currently within the float evaporate and then I'll use a hand lense to try and locate the pinhole.
Ended up ordering a replacement float and installed it in the old carb. Measured the float height at 21mm and reinstalled both carbs. When I tried to start the bike up it began revving uncontrollably. I cut the bike off and the same thing happened. Read some older forums and found that it might have been the throttle cable linkage where the single cable splits into two. I adjusted that and it seemed to stop the uncontrollable revving, but now the bike wont start at all. Really not sure what to do now. I will post videos tomorrow.
Pictures of the areas you worked on always help. Words rarely describe things well enough to make educated guesses in situations like this, because we can't see everything that was worked on or touched in a specific area where other things could have accidentally been affected as well.Well turns out I didn't stop the uncontrolled revving issue by shifting the throttle cable linkage. I started the bike this morning and it began uncontrollably revving once again. In order to start it, I had to have the choke on. Once it began running I took the choke off and the rpms went down a bit but not substantially. It was also backfiring a bit and it did not previously do that. Any ideas?
Well turns out I didn't stop the uncontrolled revving issue by shifting the throttle cable linkage. I started the bike this morning and it began uncontrollably revving once again. In order to start it, I had to have the choke on. Once it began running I took the choke off and the rpms went down a bit but not substantially. It was also backfiring a bit and it did not previously do that. Any ideas?
This sounds like an excellent idea. Do you have any recommendations for aftermarket throttle cables?It's worth taking the air filters off, so that you can look down inside the carbs, to see if both slides bottom out correctly when the throttle is opened and closed, also that they both lift simultaneously.
I've had issues with the 2-1 junction box on an aftermarket throttle cable, both with it sticking, also secondary cables not being quite long enough.
I realized one was installed incorrectly. I thought I placed them in correctly but one must have slipped around when I was trying to wrangle the spring and throttle cable.make sure you put the slides in facing the right way when you reinstalled the carbs. the cutout should be facing the airbox.
Is the charging system all original at this point? Stock rectifier (#4) and separate regulator (#1) under the battery box, like the picture below?I'm currently planning for future upgrades/repairs and am seeking advice on a few things.
My battery seems to drain more frequently than I'd like it to. Would a regulator/rectifier upgrade help reduce the drainage or improve charging? I found on another vintage Honda twin forum this rectifier/regulator combo http://www.sparckmoto.com/Products/Detail/7. Is this my best option. I currently have a lead acid battery.
Rear shocks are replacement items, front forks can be rebuilt with new seals and fresh fluid. Not sure if there are any videos out there of it but probably, though you should always take any video with caution and a grain of salt as the people making them often only think they know the right way to do things. Using the FSM and asking questions here, accompanied by plenty of pictures of what you're working on, will be the best help you'll get.I also think my front and rear shocks probably need to be serviced. I was thinking of eventually replacing the rear shocks, but more importantly I would like to service my front shocks and replace any oil that may or may not be in there. Does anyone know of a good instructional video for this service? I will of course consult the manual, but it helps me to see the process as well.
There is no danger riding it as is until you can do the repair, and there is little to nothing you can do from the outside to slow the leak aside from re-torquing the head and that is unlikely to make a difference. You do understand that the engine will have to be removed from the frame to do the work, right? It's not a difficult job, just a lot of disassembly and reassembly.Lastly, I think I have some oil leaking from in between my cylinder head/cylinder. I am hoping this is just a bad gasket that can be replaced sometime next winter. Is there any temporary repair I can do to correct the issue? Is this something that needs to be immediately repaired or can it wait as long as I monitor my oil levels?
Thanks for the info! I didn't have time yesterday to check for the original rectifier and regulator. I'll try and have a look this afternoon and let you know what I find. Not really sure what to expect. i think the wiring harness was messed with by the PO so maybe they installed a new regulator/rectifier at some point.Is the charging system all original at this point? Stock rectifier (#4) and separate regulator (#1) under the battery box, like the picture below?
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If so, the Sparck Moto unit would be the best replacement for both of those, yes. While the original rectifier could be the cause of your battery drain, since you're using an old school flooded lead acid battery and they rarely last more than a couple years on average, the battery could be suspect as well.
Rear shocks are replacement items, front forks can be rebuilt with new seals and fresh fluid. Not sure if there are any videos out there of it but probably, though you should always take any video with caution and a grain of salt as the people making them often only think they know the right way to do things. Using the FSM and asking questions here, accompanied by plenty of pictures of what you're working on, will be the best help you'll get.
There is no danger riding it as is until you can do the repair, and there is little to nothing you can do from the outside to slow the leak aside from re-torquing the head and that is unlikely to make a difference. You do understand that the engine will have to be removed from the frame to do the work, right? It's not a difficult job, just a lot of disassembly and reassembly.
Is the charging system all original at this point? Stock rectifier (#4) and separate regulator (#1) under the battery box, like the picture below?
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If so, the Sparck Moto unit would be the best replacement for both of those, yes. While the original rectifier could be the cause of your battery drain, since you're using an old school flooded lead acid battery and they rarely last more than a couple years on average, the battery could be suspect as well.
Rear shocks are replacement items, front forks can be rebuilt with new seals and fresh fluid. Not sure if there are any videos out there of it but probably, though you should always take any video with caution and a grain of salt as the people making them often only think they know the right way to do things. Using the FSM and asking questions here, accompanied by plenty of pictures of what you're working on, will be the best help you'll get.
There is no danger riding it as is until you can do the repair, and there is little to nothing you can do from the outside to slow the leak aside from re-torquing the head and that is unlikely to make a difference. You do understand that the engine will have to be removed from the frame to do the work, right? It's not a difficult job, just a lot of disassembly and reassembly.
Next issue to fix is a bent center stand and missing spring. I also think the attachment point on the bike for the spring is missing
Would it be easier to fix the center stand or install a new side stand? I currently have the center stand tied up.View attachment 44997View attachment 44998View attachment 44999
And that's part of the mystery with his K0,
I wish I could help you out, but when I went to inspect and measure my spring for you, lo and behold, it was missing along with the little piece of metal used for mounting it to the frame. I'm not sure what size it was, but it seemed smaller than 5 inches.How did you determine the proper spring length? I can’t get an OEM spring online, nor can I find out what the size it would be. I measured from the frame to stand attaching points both up and down. I just don’t know how much tension there should be when up (at rest). I measured 6 3/8 inch when up, and am guessing I need something around 6 inches; 5 or even 5 1/2 inches would maybe be too much tension.
If there is something in particular I should take a photo of, I am happy to do so.Stuck again! Tried fixing my throttle cables and messed something else up. My throttle cable gets pulled when the bike forks turn right which causes the bike to rev uncontrollably. I thought I would try and fix the issue and replace the old cables all at once. I installed the new cable without removing any other wiring. At first I thought I was just having issues with the carb tuning because I was getting the bike to start but with a high idle speed. The bike then began not starting and I checked my spark plugs for spark. I determined there was no spark based on testing both spark plugs against the engine casing. I then found the fuse had blown. I replaced the fuse and had spark once again. Thinking I had solved the issue, I began trying to tune the carbs again. The bike started and idled for a while at high rpm. It then stopped and hasn't cranked back up. I noticed that the wire coming out of the points cover sparked against the points cover. That was then
followed by a large pop. The pop sounded like a backfire but maybe even louder. It appears no power is making it's way to the spark plugs, the spark plug boots, or the spark plug wire. The points are receiving power. I attached a test light to the negative terminal on the battery and the test light probe to the points and it lights up when the points are closed. What should I be checking now. Lights, turn signals, neutral light, brake light, and horn all work.
Everything in the areas of what you described in the previous post - points wiring with the cover off, throttle cable routing, etc. And when you said you didn't "remove any other wiring", were you talking about actual wiring or other cables? Generally speaking, replacing cables doesn't usually involve wiring except at the right handlebar switch. Terminology is important so we know what exactly you're trying to describe.If there is something in particular I should take a photo of, I am happy to do so.
That rubber grommet on the points wire fits into a recess on the cylinder head, holding the wire away from the hot metal.
This is my CB200 head, but essentially same as 175.
I was able to find the location for that rubber stopper, but there is no way the wire will reach there with its current length. I also inspected the attachment point between ignition condenser and the points and it appears the points wire is even more messed up than I previously knew (see photo).A
That makes a lot of sense! I will put it up there in the correct location. Thank you!
You might consider just getting a new wiring harness and redoing the whole bike. It's a tedious job but we're seeing and reading about a lot of deterioration issues. At some point it might be better to accept that this is more of a project than you hoped, and dig in.
I was about to say, we can't see it from hereWill get some photos of the issue today.
I rerouted the throttle cable as you suggested and that has fixed the revving issue. Seems to be running well now. I think I must have accidently bumped the choke lever or something. I typically don't need to use the choke.The upper part of the throttle cable should be routed above the left front tank mount rubber, not below. That will add some slack to the upper part that is being pulled by the bars due to lack of enough length to accommodate the turn to the right (because the cable crosses over to the left side of the bike).
However, I'm not sure why you're running it with the choke on at least halfway, once it's running for a minute or so the choke should be off. And it sounds like it's only revving on one cylinder, possibly from over-richness
Unless the main harness got pulled and it affected some connections inside the headlight case where all those relevant connections are from the right handlebar switch.I think the issue must be with wiring underneath the gas tank because I've checked all the other visible connections.