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

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.

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

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.

Front Fork Oil cc (right leg):170
Front Fork Oil cc (left leg):170
Fork oil grade:10w
Valve Clearance Cold - Inlet:0.08
Valve Clearance Cold - Exhaust:0.08
Engine Oil Grade SAE:10w/30
Engine Oil Classification API:sg
Engine Oil quantity with filter (litres):0.9
Idle Speed (rpm):1400 - 1500
Spark Plugs Gap (mm):0.8 - 0.9
2 Stroke Tank - Litres:No
Float Height:14 mm

Could you please explain more of what you mean about this bike, what you have said doesnt make much sence to me ????

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.

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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Try to used spark plug with single spacer and use 20w /50 motor oil.

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