Harley davidson motorcycle 1971

according to my research

NGK Part # 2298
{0.03 gap}
Gap .030

Hi check the timing marks on the crank/flywheel when the (F) mark appears for front cyl the points should be just opening. It's the same for the rear cyl you can fine tune with a timing light if you can get one otherwise this method will be enough to get it to run. Regards Jim...

Shawn, On older motorcycles the spark timing is set by the points. Your point gap should be .012 to .016 thousandths of an inch. .015 is a good place to start...

Transmission/primary or engine????

Engine drain plug is in a rubber hose that hangs down under the motorcycle transmission area at about the point where the kickstand rests in it up position. It has a worm clamp that you would loosen with a one quarter inch socket to allow you to pull the plastic plug out to let the engine oil drain out. The transmission/primary drain plug is on the bottom of the primary cover right below the middle of the clutch inspection (derby) cover. It is a 5/8 inch hex head plug

Hi Anonymous, .018" the exact thickness of a matchbook cover if you are ever in a world where feeler gauges don't exist. Have nice day.

Your 1971 125 is one of the Aermacchi / Harley-Davidson motorcycles. They were built in Italy. You may be able to get a wiring diagram at http://autos.groups.yahoo.com/group/Aermacchi/

For parts, go to http://www.motomacchi.com/

Good Luck
Steve

I'm not really sure on this late of a model. The drain is on the bottom of the transmission and I think it's a pipe plug on the front of the transmission oil pan. The earlier models that I work on had a drain plug that looked exactly like the engine oil drain plug that was also on the bottom of the oil pan. Many a transmission has been drained thinking it was the engine oil drain. Go to this site and look at the picture of the transmission housing. http://www.bikebandit.com/2008-harley-davidson-touring-street-glide-flhx/o/m18635#sch624765 Pay particular attention to the oil pan gasket at the front of the pan. Notice the hole in the gasket directly above the socket head pipe plug, part #96. This looks like the transmission drain to me.

Good Luck
Steve

go to Crane's site for TECH INFO. http://www.cranecams.com/motorcycle/instructionslist.php?x_catagory_sub=37 There are several H1-4 systems listed, look on your unit and find out exactly which one you have.

Good Luck
Steve

The book you need it either an OEM Harley-Davidson manual, part #99482-69 or a Chilton's M420 manual. Both are good manuals and readily available.

Good Luck
Steve

Point gap is about .018" if you can get the
timing aligned there. If not, vary the gap
slightly.
Spark plug is NGK BPR5ES-11 with a .022"-.025" gap.

Electronic ignition plug gap is much larger at .040"