Topic: Motorcycle just not getting running right

[messeduptriple]

Idk if anyone can help but I have had some issues with my bike as of lately. I had a guy who works at bike shop take the bike and do some work on it.
I had issues with the bike wanting to bogg down and I posted that thread on here before. I actually had done what few people told me to do. I bought new carb kit...boots..replaced gas lines and he did few other things as well.
This is what he did.


Gas lines are replaced. I adjusted the valves, replaced the spark plugs, cleaned the carbs, fixed the seized timing advancer, adjusted the timing, and set the points gap. I still need to flush and bleed the brakes. 

Now I posted a video before and tried to get thesound of what's going on with the bike. If you can just paste that and check on YouTube...see what you think?

I'm just lost and confused. It runs worse actually now just no longer having the bog down completely issue anymore. I had that before where it wanted to bog down and die after I took it for spin for bit. That's no longer an issue it idles fine. It's when I'm on the gas it's feeling like its not 100% power. It's like 80% . I don't have that real sharp punch to it anymore. Idk if anyone can help me but I'm really frustrated now.

Here's my video.


 

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[robvangulik]

Are all four headers equally hot?
It sounds like its living up to your name and running at 75%, i.e. 3 cylinders.
You should change to messedupfour!

[messeduptriple]

I didn't do any fo the work on it. A guy at local Honda shop did as side job at home..

The motorcycle is a Honda 76 550 K.
It has a carpy 4 to 1 exhaust.

Yea Idk.  It ran ok and got me home. Then next day took out and just ran like garbage.

I'm at work and will have to check this evening on the heat on the exhausts.


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[Duke McDukiedook]

If you are getting spark to all four I would look at cleaning your crabs again.

[70CB750]

If you are getting spark to all four I would look at cleaning your crabs again.

 

[Don R]

 Check the ignition wires and plug caps.

[Tracksnblades1]

Check the ignition wires and plug caps.

+1

Plus, I would verify those points are spot on. Then check 1&4 timing, then 2&3.
Unfortunately you still may not be done. If a timing correction is made, it may change your points gap again. Requiring you to check your timing again.........again......This can be caused by the clearance between the point plate and the engine's point plate mounting bosses. PEWE has posts about corrective measures that can remove excessive clearance to ease this process.


It sounds like one set are doing their job and the other is close but not quite.

Start her in pitch blackness and watch your plug wires for a light show or a no show.👀

Check and recheck 😉

[messeduptriple]

My buddy came and took look. He said the left carb is non responsive. If I take the carbs off...what am I looking for to fix this issue? I have no idea what I'm doing. Can anyone guide me in where to start with this carb?

:/

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[robvangulik]

I didn't do any fo the work on it. A guy at local Honda shop did as side job at home..

The motorcycle is a Honda 76 550 K.
It has a carpy 4 to 1 exhaust.

Yea Idk.  It ran ok and got me home. Then next day took out and just ran like garbage.

I'm at work and will have to check this evening on the heat on the exhausts.

My buddy came and took look. He said the left carb is non responsive. If I take the carbs off...what am I looking for to fix this issue? I have no idea what I'm doing. Can anyone guide me in where to start with this carb?

:/

Start by answering all the questions in earlier posts, it is so simple: to run an engine needs air, fuel and a spark at the right moment . Does it get fuel? Loosen the lowest screw at the bottom of the float bowl. Fuel leaks out? OK. No fuel? Find out why not.
Air filter(s) reasonably clean? OK. Not? clean...
Sparkplugs spark? OK, bike runs. No spark? Find out why not.

[Bodi]

"I bought new carb kit"
Red Flag!
What kits?
It is well known that aftermarket carb kits are a crapshoot. The jets and needles are unpredictable, while genuine Keihin parts are very predictable: a 110 Keihin jet will flow exactly what it should so switching from a 105 will always go richer; a brand X jet... who knows... a 110 might be richer than a stock original Keihin 105, maybe the same, maybe even leaner.

[PeWe]

Stock air filter box or pods? You will get jetting advice that will improve.
It sounds as you have an exhaust leak and running too rich.

If ran better before, dirt in carbs might cause lean. Main jet falled out, now in float bowl?

[messeduptriple]

"I bought new carb kit"
Red Flag!
What kits?
It is well known that aftermarket carb kits are a crapshoot. The jets and needles are unpredictable, while genuine Keihin parts are very predictable: a 110 Keihin jet will flow exactly what it should so switching from a 105 will always go richer; a brand X jet... who knows... a 110 might be richer than a stock original Keihin 105, maybe the same, maybe even leaner.

I'm sorry I meant gaskets. I asked that he clean the carbs and just go through it. So I didn't get different jets or anything.


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[messeduptriple]

Stock air filter box or pods? You will get jetting advice that will improve.
It sounds as you have an exhaust leak and running too rich.

If ran better before, dirt in carbs might cause lean. Main jet falled out, now in float bowl?

Yes stock air box..no pods

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[Tracksnblades1]

My buddy came and took look. He said the left carb is non responsive. If I take the carbs off...what am I looking for to fix this issue? I have no idea what I'm doing. Can anyone guide me in where to start with this carb?

:/

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Was this carb non-responsive when turning the idle mixture screw...?
If so, it may be that cylinder was not firing at idle.....

You could try riding it, after warmed up, as in the video with the gas petcock shut off for 30-60 seconds to see if it runs better or worse as it starts running (out of gas)  lower and lower levels in the float bowls.

I have a buddy that cleaned his jets by running wires through them.  He did a great job cleaning them, but his bike wouldn't run right until he replaced them with new jets.....?

Does your bike have pods or velocity stacks...?
Was your valves set correctly...?  When I listen to your video, I think I hear a tight intake spitting back through a carb during throttle transitions or a leaky exhaust. You would only be able to hear a intake spitting back through a carb with pods or velocity stacks. You would only see it with velocity stacks or no filters..

[messeduptriple]

My buddy came and took look. He said the left carb is non responsive. If I take the carbs off...what am I looking for to fix this issue? I have no idea what I'm doing. Can anyone guide me in where to start with this carb?

:/

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Was this carb non-responsive when turning the idle mixture screw...?
If so, it may be that cylinder was not firing at idle.....

You could try riding it, after warmed up, as in the video with the gas petcock shut off for 30-60 seconds to see if it runs better or worse as it starts running (out of gas)  lower and lower levels in the float bowls.

I have a buddy that cleaned his jets by running wires through them.  He did a great job cleaning them, but his bike wouldn't run right until he replaced them with new jets.....?

Does your bike have pods or velocity stacks...?
Was your valves set correctly...?  When I listen to your video, I think I hear a tight intake spitting back through a carb during throttle transitions or a leaky exhaust. You would only be able to hear a intake spitting back through a carb with pods or velocity stacks. You would only see it with velocity stacks or no filters..

It's basic carbs no pods. I don't know what the guy did as in setting floats and stuff. He didn't put new jets or anything.im running a Carpy 4 to 1 exhaust.ive had it on the bike for many years and it ran awesome.  I did notice yesterday that the spark plugs tips were pretty black. I cleaned them. The other two I have to clean as well probably. I don't have tool to get into that deeper socket area. I have to work today so I can't do much on it.

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[messeduptriple]

My buddy came and took look. He said the left carb is non responsive. If I take the carbs off...what am I looking for to fix this issue? I have no idea what I'm doing. Can anyone guide me in where to start with this carb?

:/

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Was this carb non-responsive when turning the idle mixture screw...?
If so, it may be that cylinder was not firing at idle.....

You could try riding it, after warmed up, as in the video with the gas petcock shut off for 30-60 seconds to see if it runs better or worse as it starts running (out of gas)  lower and lower levels in the float bowls.

I have a buddy that cleaned his jets by running wires through them.  He did a great job cleaning them, but his bike wouldn't run right until he replaced them with new jets.....?

Does your bike have pods or velocity stacks...?
Was your valves set correctly...?  When I listen to your video, I think I hear a tight intake spitting back through a carb during throttle transitions or a leaky exhaust. You would only be able to hear a intake spitting back through a carb with pods or velocity stacks. You would only see it with velocity stacks or no filters..

It's basic carbs no pods. I don't know what the guy did as in setting floats and stuff. He didn't put new jets or anything.im running a Carpy 4 to 1 exhaust.ive had it on the bike for many years and it ran awesome.  I did notice yesterday that the spark plugs tips were pretty black. I cleaned them. The other two I have to clean as well probably. I don't have tool to get into that deeper socket area. I have to work today so I can't do much on it.

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The idle screw was responding. I adjusted it when I got home with the bike cause it was set to low I felt. I wanted a bit more juice if I may say when idle. Could that have been a reason it got funny ? I put it back to where it was but it's still how I had it in video now.


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