Question about 1973 Honda CB 100

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1972 honda cl100 Scrambler K2 will not accelerate it just bogs down when i twist the throttle, what would cause a problem like this?

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Sounds like the jets are clogged in the carburetor. Try running some carburetor cleaner through it first. If that doesn't help then you will need to have the carburetor rebuilt. Hope this helps. Good luck.

Posted on Jul 23, 2009

  • essgary Oct 01, 2010

    I have had several of these bikes and right now i have 3 of them, all of them do this when they are cold they are a very cold natured bike, but assuming that this problem accures when it is hot you should check the carburator and make sure the main jet is clean, while you are in the carberator adjust the float level as this could be the problem also, the next thing i would check is the screen in the petcock bowl it seems that your bike is starving for fuel and the last thing that i would do is adjust the carburator, they are not adjusted like a normal one, you have to raise the idle screw to 1200 RPM then adjust the idle mixture for the max RPM keep adjusting the idle speed screw to keep it at 1200 RPM. when you cant get any highter RPM from adjusting the idle mixture than you are done. This will get rid of that dead spot.



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2007 Honda VTX1300R engine bogs at low rpm

Hi, Luis if you have changed your fuel delivery system, air filter size or flow rate, mufflers or exhaust system or a significant change in altitude your carburetors need re-tuning and if your fuel system (gas tank, filters, fuel valve and carburetor) is contaminated with ethanol sludge, varnish, rust, dirt, water etc. or your bike has been sitting for months or years without running these components must be "PROPERLY" cleaned and reassembled "CORRECTLY" before any adjustments can be made. Tuning your carburetor is fairly simple once you understand the basic principals. You engine is a simple airbox sucking air in and blowing it out, it is finely tuned at the factory for maximum performance once you upset that delicate balance by changing air filters, camshafts or exhaust systems your performance may go down the and the engine may run poorly, you need to compensate the air-fuel mixture in the carburetor in order for the engine to run smoothly and at peak performance. If you are running multi carburetors you need to sync them first and make sure your air cleaner element is clean and dry for paper elements or lightly oiled for foam and meshed elements and properly installed. Here is how and where you compensate trouble: "TIP" if your engine "BOGS" you're not getting enough fuel.
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6. Wide open throttle is managed by the main jet.
If you are running lean, spark plug electrode color is white, engine runs hot and feels like it is starving for fuel you need to go up on the jet size or move the c-clip down one notch. If you are running rich, spark plug color is black or dark gray, the engine runs cool, and bogs down when accelerating you need to go down on jet size or move the c-clip up one notch. When your carburetor is properly tuned for maximum performance your spark plug electrode will be a light tan color like coffee with cream. If you prefer fuel economy over performance you can go down on main jet sizes until a satisfactory level of lower performance is acceptable versus MPH, your spark plug color will be whiter and your engine will run warmer. These tuning adjustments will only make improvements if your intake and exhaust system have no air leaks or sealing issues and the entire electrical system is in proper working order and you have no mechanical issues.
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Why when i twist throttle does the engine bog down then run fine?

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After lots of work my 1972 Honda CL100 scrambler is up and running, however, I'm not convinced it's running to it's fullest capacity. Here's what I'm experiencing; at the high RPM end...

They are not a rocket ship, but I would expect closer to 50mph .
need good air filter element.
ignition advance springs can cause a problem, or the advance may be sticking.
need good battery, recheck point gap, timing and valve clearance.
check for exhaust blockage(see if it revs better without the muffler)

You have probably tried most of these, but there is not much else, they should rev sweetly right though the rev range

Jun 25, 2011 | 1973 Honda CB 100

1 Answer

96 Jimmy bogs down when I accelerate hard

Sounds like the fuel filter is getting clogged. It will flow enough fuel for normal driving, but can't supply fuel for full throttle acceleration, causing the engine to bog down. Replacing the fuel filter with a new one should fix the problem.

Feb 26, 2011 | 1996 GMC Jimmy

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What's the best way to change handle grips on a 1972 honda ct90

assuming you have bought yourself a pair of rubber grips, with a sharp knife cut through the grip to remove it clean away any old glue, replenish glue onto grip and handle bar and simply push back on to handle bar quickly clean away any unwanted glue, remember to check you new grips for internal diamiter these will be different sizes, with smallest bore grip going on the left handlebar, and the larger on the throttle twist grip, if you have bought honda original parts then the twistgrip side may be a complete unit , in which case you would need to undo the 2 screws that hold the rhand switch gear together, and twist the grip in the opposit direction to what you would do when you ride it to remove it from the bendix throttle system, replace in opposite manner using a small amount of grease inside the metal sleve,

Oct 30, 2010 | 1972 Honda CB 100

2 Answers

2001 polaris scrambler 90 will crank and idle all day long, but when you try to throttle up, it bogs down and dies. carb has been cleaned, new plug, exaust is clear of blockage, still has same problem

I dont have a solution but mine is doing the same as the posted ones--runs at idle but bogs down with fast fuel feed!! does anyone know the solution?

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1 Answer

Need Advice On Best Tires for 1972 Honda CL100

Brand is not really important. Just go to any motorcycle shop and tell them you want road tires for city streets. They may have two or three tires to choose from. Pick what looks good and go with it.

I believe your bike takes a 250 x 18 tire size on the front and a 3.00 x 17 on the rear. Look at the sizing on the sidewall of the old tires.

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Looking for good city street/commute tires for my Honda CL100
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Aug 02, 2009 | 1973 Honda CB 100

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