Question about 1972 Honda CB 100

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

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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.

Posted on Aug 18, 2011

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Posted on Jan 02, 2017

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1975 750 four with the 836 kit. Do the spark plug gaps need to be changed if it's not stock anymore?


Your best bet for initial startup and first 100 miles is to stick with stock plugs and gap. Then alter depending on what you see with plug condition. More likely you will need a different plug TYPE, depending on mods. If you have increased horsepower and/or compression ratio (depending on what you see after 100 miles), go with colder plug, and stay with current gap. If setup is now runs a little ''smokey'' (i.e. ''rich'' mixture and/or burning oil), go with hotter plug and stay with current gap.

Aug 16, 2015 | Honda Motorcycles

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1971 Honda CL 350 spark plug type


Hi, Anonymous NGK B8ES is the standard plug for your bike, B7ES will make the cylinder head temperature 30 degrees hotter for this scenario you will need your service, parts fiche, and owners manual if you can't find the best tool you ever bought for your Honda, despair not, for a mere zero $0 you can download another one. For more information about your issue and valuable "FREE" downloads that you will need for viewing and printing please click on the blue links below. Good luck and have a wonderful day.
http://oldmanhonda.com/MC/DataTable.html
https://www.ngksparkplugs.com/about-ngk/tech-talk/spark-plug-basics
http://www.scramblercycle.com/uploads/3/8/9/5/3895611/honda_cb250_cl250_cb350_and_cl350_workshop_manual.pdf
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Jul 03, 2014 | Honda Motorcycles

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Gear oil for 2004 honda crf 100


Fuel and ignition Sparks per cylinder: Fuel supply system: Carburetor Ignition type: Digital CDI Funnel diameter: 0.87 inch Compression: Engine mounting: Transverse Lubrication system: Wet sump Gear box: Manual 5-speed Clutch: Wet, multiple discs, cable operated Final drive: Chain Spark plug pipe type: NGK, CR7HSA Motor oil: Synthetic, 10W/40 Starter: Kick-starter

Jan 11, 2014 | 2004 Honda CRF 100 F

1 Answer

Adjusting the points


With points cover off,slowly bring engine to the highest point on the points cam.Its easiest to do this with the spark plug out,and slowly spin the engine with the kick start. Once you get it to the highest point on the points cam,the points should be "open". Insert feeler gauges untill you find the correct one...(it should have slight resistance). The check what the recommended gap is for that model. After finding the recomended gap,use the feeler gauge that matches the recomended gap,and isert between the points. There should be two screws,one on each end of the points. Loosen those two screws,and the body of the point will move,one way to "open": the gap,the other to "close" the gap. With feeler gauge between the points contact,close untill you feel slight resistance when moving the gauge back and forth,and tighten the set screws on the points body.

Aug 31, 2012 | 1973 Honda CB 100

1 Answer

What is spark plug gap on 4 stroke 70cc engine?


The Honda CRF100F 2003-2005 has a 100cc engine and uses a spark plug gap of .7 mm.

The Honda CRF70F 2003-2005 has a 70cc engine and uses a spark plug gap of .7 mm.

Sep 09, 2011 | 2005 Honda CRF 100 F

1 Answer

The bike is starting only with small plug gap.If we set the gap to original it wont start? tell me the reason?


.....A weak battery comes to mind for starters. A carboned up spark plug is another; start with a new spark plug. If I recall correctly from 39 years ago, your bike has ignition points and condenser. Remove the points cover (on left end of the overhead cam), and check the points. Burned? Pitted? Get a new set of points and condenser but for now, just file the points a bit using an emery board or metal fingernail file. Set the points to .015 clearance at the high point on the cam lobe. If you have a timing light you could check the timing and adjust as needed by rotating the points base plate left or right. Bad points give resistance to the flow of electricity. When the points are closed, the condenser gets charged up. Less electricity going through the points means less of a charge going into the condenser. Now the points open up and the stored charge goes from condenser to coil. The coil then produces a spark. With a low charge in the condenser, the spark is weak and will not jump a wide gap. Set the plug gap to very little and the weak spark can jump the gap. The standard gap is .028. ....... I don't recall when Honda move the points to the flywheel but the images below may help if your bike is that style. Clean any rust on noted parts; magnets and pick up coils. Okay, now I have done my part. Now you gotta do yours; please rate my answer. Thanks! tombones49_177.giftombones49_178.gif

Jun 15, 2011 | 1972 Honda CB 100

2 Answers

I have a 1972 Honda xl250. It sat outside for 10 years before I got it. Alls it needed was a carb and it cranked after the 4th or 5th kick. About a week later it quit running. I figured out that it was'nt...


You are probably dealing with dirty,burnt,or shorting points. Try replacing the points located at the end of the crankshaft under the cover held on by two screws. You may have to install and reinstall the points several times before you can get the new points to work. Chances are the points in the machine are almost 40 years old. Also , Honda ignition systems run off the battery. In most Honda models if you do not have a good, charged battery , you will not get spark.

Dec 18, 2010 | Honda Xr 250 Motorcycles

2 Answers

What type of spark plug does a 1971 triumph bonneville take?


NGK B8ES
Champion N3
Lodge HLN
KLG FE100
All have 14mm thread diameter & 3/4" reach
Gap is 0.025" (0.64mm)

Ride safe
Bike-Doc
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May 01, 2010 | 1972 Triumph T 100 R

1 Answer

What is the correct gap for a set of contact points and spark plugs for a 1300 cc 1972 vw beetle


SPARK PLUG GAP IS 0.024 TO 0.028 AND CONTACT POINTS GAPS SETTING IS 0.016. DWELL ANGLE IS 44 - 50 DEGREES.

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