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a sloper Nice little scoot if you're not in a big hurry
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181 Posts
What brakes?
Had one with a custom 2 into 1 megaphone. Everyone thought it was a 2 stroke riding on the pipe the whole time.
Had one with a custom 2 into 1 megaphone. Everyone thought it was a 2 stroke riding on the pipe the whole time.
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If you are asking about jetting changes, did you alter the air intake? That is way more likely to induce a carburetor issue then an exhaust system change. Your carburetor has a main jet needle / cir-clip adjustment that does not require buying anything to make a change. Details can be found here: Jet Needle; Throttle Valve; Slow Speed Jet; Air Screw - Honda CB125 Service Manual [Page 53]
It’s stock except for aftermarket mufflers that seem to have no baffles.
It has a slight flat spot just off idle.
I have tried the needle and it runs best in the middle clip, tried a different main jet to little effect. Slow jet is what the book says it should be, can’t find replacements to try at this time.
lit runs best cold, so I think I’m a little rich.
I have tried infinite adjustments of the bleed screw. I’m at sea level so I shouldn’t need to be to far from stock.
Runs really good at all other places.
It has a slight flat spot just off idle.
I have tried the needle and it runs best in the middle clip, tried a different main jet to little effect. Slow jet is what the book says it should be, can’t find replacements to try at this time.
lit runs best cold, so I think I’m a little rich.
I have tried infinite adjustments of the bleed screw. I’m at sea level so I shouldn’t need to be to far from stock.
Runs really good at all other places.
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Highly recommend you set the valve clearances and a perform a compression test.
Stock ignition is a fine art to set and can contribute to similar symptoms.
Stock ignition is a fine art to set and can contribute to similar symptoms.
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181 Posts
Yes it needed jetting, filters ect. It was an incomplete bike. I tent to take on part piles. Or I used to take on part piles, now I really tend to go for modern bikes.
Getting jets for those is a PIA because they use an older style thread pitch (JIS?). That plus the fact that the jets are all really tiny and I don't just mean the orifice size which make them hard to get the jetting spot on. I tried a set of 6Sigma jets but none of their parts fitted and I am sure that's because the bike they had to work on was not stock and had the wrong carbs on it.
if you had a spare set of slides, I would suggest you file the intake side to increase the cutaway which is what i will probably do next when it warms up. We have three running CB160s right now. One has a sloper 175 top end with CB77 26mm carbs. The second has 175 barrels with different cylinder liners and custom pistons and Cb200 head and the third is a neat little cafe racer. Almost stock and incredibly cute.
if you had a spare set of slides, I would suggest you file the intake side to increase the cutaway which is what i will probably do next when it warms up. We have three running CB160s right now. One has a sloper 175 top end with CB77 26mm carbs. The second has 175 barrels with different cylinder liners and custom pistons and Cb200 head and the third is a neat little cafe racer. Almost stock and incredibly cute.
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Pics? We all like pics..........
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Is the air filter clean?
Save the old filters so you can rebuild them; original replacements are very expensive and incorporate a rubber intake stack that extends into the air filter. It needs that part.
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I only ever seemed to run mine wide open to go with traffic.
TrialsRider is correct you need the intake stacks. Check that your timing is correct and that the advance is operating correctly. My advance was a constant issue. If you have what looks like stock filters make they have the stack that goes way inside the filter. They are long!
TrialsRider is correct you need the intake stacks. Check that your timing is correct and that the advance is operating correctly. My advance was a constant issue. If you have what looks like stock filters make they have the stack that goes way inside the filter. They are long!
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Simple rider test for carburetor float level setting without any tools required: If a carburetor exhibits problems only when you set the motorcycle on a step down-grade or steep upgrade slope, the problem is almost certainly the carburetor float level setting.
If a carburetor exhibits problems only when you set the motorcycle on a step down-grade or steep upgrade slope, the problem is almost certainly the carburetor float level setting.
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He said It has a slight flat spot just off idle, not pissin fuel out
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