Question about 1970 Honda CB 100

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Just got a 70honda cb 100 has no spark been

Just got a 70 honda cb 100 has no spark been messing with the points no luck

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Make sure kill switch is not killing spark even in the run position. Chech all fuses (test them) make sure power to and from coil is there. the CDI is not repairable but could need replacing.(not sure if the cb 100 has this with points) is the condenser good? if it is it can be charged and discharged with a mulitmeter.(use ohms resistance to charge it and volts dc to read as it discharges CAREFUL it can BITE)

Posted on Apr 26, 2010

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How do i fix a no fire on a honda cb 100?


Take a close look at the shaft where the lobe is, is there play in the shaft? High mile bikes the bushing or shaft can wear down and not open the points correctly. You did a good job troubleshooting so far.

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1 Answer

72 Honda cb100 has spark sometimes but loses it randomly


I would check the Lucar connectors from the battery, through the ignition switch and down through the coil to the points.

Mar 23, 2011 | 1972 Honda CB 100

1 Answer

Whats the correct spark plug gap for a 1972 honda cl 100. And what is the recomended type of oil to use?


Correct spark plug gap is 0.6 -0.7mm and oil viscosity is variable like SAE 20/30w some thing like this and also depends on weather conditions.

May 13, 2010 | 1972 Honda CB 100

1 Answer

Put new ignition coil on, however still no spark


Im sorry you are having this trouble with your CB 100. I had a CB 100 from '71.

So you have power going to the coil? How are your points and condenser. I think your trouble is probably your condenser complicated by points that are not properly set. Set the points to .035.

Check these things and try again.

FYI, there is a Honda Riders Club sponsored by Honda and free to browse. If you pay a few bucks and joinn the club, you will get immediate access to service manuals for your model, according to information posted at the site.

http://hrca.honda.com/

Thank you for posting your question at FixYa.com

Nov 08, 2009 | 1976 Honda CB 100

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