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Re: harley davidson motorcycle 1971
Some of us here do work on Harley's. You are correct on the gap, and here's enough to get started on the timing. Pull the spark plugs and set the point gap to .018 for 12volt systems, .022 for 6 volts, on the highest point of the point-cam lobe. Turn engine over until the front cyl point cam lobe (the small one) is coming around and getting ready to open the points. Remove the timing plug on the engine and gently turn the engine on the kickstarter until the timing mark appears in the hole. On most earlier big twins it should be a straight line, get it approx. in the center or slightly before.
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Go online to the Harley Owners Club for more info. I wouldn't think its much of a job for an experienced mechanic but Harley knowledge is a must. Don't attempt it if you aren't sure. Its a critical item.
If the plugs require cleaning between tune-ups, proceed by degreasing the firing end of spark plug using ELECTRICAL CONTACT CLEANER and then dry plug with compressed air. THEN using a thin file flatten the spark plug electrodes because a spark plug with sharp edges on its electrodes requires 25-40% less firing voltage than one with rounded edges. If the plugs cannot be cleaned, replace with them with 6R12 spark plugs. Check the electrode gap with a wire-type feeler gauge and bend the outside of the electrode so only a slight drag on the gauge is felt when passing it between the electrodes. Proper gap measurement is 0.038-0.043 in. (0.97-1.09 mm). Check the condition of the cylinder head and plug threads and if necessary remove deposits by applying penetrating oil and clean them out with a thread chaser. Apply a good sensor safe ANTI-SEIZE to the plugs and then install and tighten them to 12-18 ft-lbs (16.3-24.4 Nm).
no you do not have to take the engine off the frame. all you do is remove the gas tank and seat disconnect all wiring to the engine take the carb off and unbolt the rocker cover of the cyclinder that has the blown head gasket then unblolt the head replace gasket then reasemble in the reverse order
more likely an intake leak timeing doesnt just go off on its own if you still have points it could be the condensor but id be changing that to electronic ignition anyway a complete ultima ignition system is lees than 2 bills and not real hard to install "good instructions"
Pull the spark plugs out and hit the starter. This will make sure that the engine is not locked up. If the starter does not turn the engine, put the bike in first gear and have someone push you, making sure the engine is free. If the engine is OK, your starter is probably jammed and needs replaced. That wire getting hot is a dead giveaway something is locked up tight...starter or engine. If ya have a large hi-performance engine in the bike, chances are your stock starter won't do the job.
do you have commpression releases on your motor if not you may need to in stall this will ease the stress off your starter and your motor will turn over easier if you do have the releases not sure what you may need to do without hearing the drag to determine if gearing is issue
Timing is off. If the timing isn't exactly right it will turn over until the battery goes dead or the starter burns up (which ever comes first). The fuel/air mixture has to be ignited, expelled from the engine,etc. for the bike to run.