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69 harley 900 sportster magneto timing - Motorcycles

Posted by Anonymous on

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6ya6ya
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Posted on Jan 02, 2017

wd4ity
  • 4565 Answers

SOURCE: diagram for 1984 harley sportster

contact me directly and I can scan a parts diagram for you
wd4ity @ bellsouth.net

Posted on Sep 23, 2009

wd4ity
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SOURCE: Adjusting timing on Harley Davidson 1976 sportster

The advance timing should be 35° before Top Dead Center. This is how you find out which mark this is.

Get the rear wheel of the bike off the ground, remove the spark plugs, shift the bike into fourth gear, and remove the timing plug from the left engine case.
Now, take an ordinary PLASTIC DRINKING STRAW and insert it into the front spark plug hole. Do not use anything else or you stand a chance of it breaking and then you'll have to pull the head to get it out. The plastic straw will bend but not break.
Bump the rear wheel in the direction that it turns while riding down the road until the piston pushes the straw all the way up and just barely starts going back down. Look into the timing hole. You should see a timing mark. This is the Top Dead Center mark. Now, bump the rear wheel BACKWARDS until you see another mark. This should be the ADVANCED TIMING MARK. The piston should 7/16" down from top dead center.

On this model Sportster the timing is advanced by a mechanical advance mechanism. These units are notorious for wearing out and not contolling the timing very well. You must remove the breaker plate to inspect this mechanism. Mark the position of the plate before you remove it. If the pins and holes in the flyweights are worn, replace the unit. Replace it with a good needle bearing unit. Replace the points and reset the gap at 0.018 - 0.020".

Posted on Sep 24, 2009

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SOURCE: wiring for harley sportster 1989

good day,
hope this link below will solve your problem.

motorcycles

Posted on Jul 30, 2010

wd4ity
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SOURCE: I need to install a

Been a long time since I've done one of those. Let me brush some cobwebs aside and see if I remember how I did it. The magneto fired Sportster engine was equipped with a mechanical left handlebar ignition advance mechanism. You retarded the timing, got the engine fired, and then advanced the timing using the left handlebar grip that was similar to the throttle. When installing the magneto, make sure you install it with it in it's retarded position which is with the body of the magneto at it's maximum clockwise rotation when viewed from the top of the magneto.

The manneto drive shaft will turn as you drop the unit into the cases. You must turn the drive shaft to a position so that when you drop the magneto into the cam gear case it rotates to a point to where it is just about to open the points. I remove the timing plug of the engine and bring the front cylinder up on Top Dead Center on the compression stroke with the mark in the middle of the hole. Then I'd connect an ohm meter, a "buzz box" or simply use a piece of celophane wrap off a cigarette pack placed between the closed points to give me an indication of exactly when the points began to open. I'd rotate the mag until the points just barely opened with the Front Cylinder TDC mark in the hole. This is setting your initial timing at Top Dead Center on the front cylinder. Once the engine is started, you can set the timing using a timing light to set it the max advance timing to the front cylinder advanced timing mark. With the engine running, advance the timing using the handlebar grip. To adjust the front cylinder timing, connect a timing light to the front cylinder spark plug wire. Shine the light in the hole, loosen the clamp that holds the mag and adjust the magneto position until the front cylinder advanced timing mark is in the hole. Tighten the clamp. When you kill the engine, you turn the handlebar grip back to ****** the magneto. Usually, this results in an initial retarde timing of about 5-7° BTDC.

I hope this helps.

Steve

Posted on Jul 01, 2011

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On the 1974 xlch Harley Sportster 1000cc kick start is there a way to retard the spark on startup?


early harleys have an impulse magneto as the ignition system
that means that as you press on the crank pedal the piston moves up , the magneto is held back by a spring until it reaches a set timing point at which point it releases for maximum spark
the method of start this type of equipment is to kick start slowly and not as you would for conventional type kick start
you have probably noticed that if you try for a fast kick start it tends to throw the lever back up under your foot
Just an aside here --there was a joke about harleys with electric start--if it back fired your thumb would get broken
joke based on the fact of the impulse magneto that was replaced with an electric start system
the impulse magneto operation is what gives the harley the strange idle operation
get a harley workshop manual or talk to a harley service center for correct ignition timing of the impulse magneto

Nov 27, 2016 | Motorcycles

1 Answer

Weak spark magneto


Hi Anonymous, for more information about your question please visit the website below. Good luck and have nice day.
magneto Harley Davidson
http://www.hydra-glide.com/phpBB3/viewtopic.php?f=5&t=6755
The Jockey Journal

May 09, 2013 | 1993 Harley Davidson XLH Sportster 883...

1 Answer

1964 XLCH Sportster leaking oil form magneto


don't worry about it seams worse then it is thats what old harleys do

Feb 19, 2013 | Harley Davidson XLH 1000 Sportster...

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1964 xlch sportster oil leaks


Hi Michael, sure can there is an o-ring on the magneto shaft that should be replaced. Good luck.

Feb 19, 2013 | 1979 Harley Davidson XLH 1000 Sportster

1 Answer

I need to install a magneto on a 57 xl harley sportster. I need to know the procedure to accomplish this. Thanks.


Been a long time since I've done one of those. Let me brush some cobwebs aside and see if I remember how I did it. The magneto fired Sportster engine was equipped with a mechanical left handlebar ignition advance mechanism. You retarded the timing, got the engine fired, and then advanced the timing using the left handlebar grip that was similar to the throttle. When installing the magneto, make sure you install it with it in it's retarded position which is with the body of the magneto at it's maximum clockwise rotation when viewed from the top of the magneto.

The manneto drive shaft will turn as you drop the unit into the cases. You must turn the drive shaft to a position so that when you drop the magneto into the cam gear case it rotates to a point to where it is just about to open the points. I remove the timing plug of the engine and bring the front cylinder up on Top Dead Center on the compression stroke with the mark in the middle of the hole. Then I'd connect an ohm meter, a "buzz box" or simply use a piece of celophane wrap off a cigarette pack placed between the closed points to give me an indication of exactly when the points began to open. I'd rotate the mag until the points just barely opened with the Front Cylinder TDC mark in the hole. This is setting your initial timing at Top Dead Center on the front cylinder. Once the engine is started, you can set the timing using a timing light to set it the max advance timing to the front cylinder advanced timing mark. With the engine running, advance the timing using the handlebar grip. To adjust the front cylinder timing, connect a timing light to the front cylinder spark plug wire. Shine the light in the hole, loosen the clamp that holds the mag and adjust the magneto position until the front cylinder advanced timing mark is in the hole. Tighten the clamp. When you kill the engine, you turn the handlebar grip back to ****** the magneto. Usually, this results in an initial retarde timing of about 5-7° BTDC.

I hope this helps.

Steve

Jul 01, 2011 | Harley Davidson XL 53 C Sportster Custom...

1 Answer

Setting Points 1960 sportster magneto


Set the points gap to 0.020". For more information on the magneto, go to this site or do a search for Fairbanks Morse Magneto.

http://www.oldgravelys.net/pdf/Fairbanks_Morse_Magneto.pdf

Hope this helps,
Steve

May 20, 2011 | Harley Davidson XLH 1000 Sportster...

1 Answer

Yes I have a 1967 Harley Sportster 900cc Ironhead, My problem is it is way to AWESOME, What should I do about that? Im freaking out man.


get a strong lock so no one steals it-thats classic n from my time-dont see magneto ignitions now--wear a 3 quarter helmet and dress conservative-the ladies will lovit--dont forget the peter fonda glasses--do u hav a repair manual

Jan 10, 2011 | 1979 Harley Davidson XLH 1000 Sportster

1 Answer

Tring to time oilpump but when hole on oilpump shaft is inline the timing mark moves out of timing hole working on harley 63 sportster


Bring the engine to top dead center and find a way to lock the engine in that position. When you lift the oil pump into position, you'll notice the the oil pump drive gear rotates when it engages the pinion gear. You have to turn the pump backwards so that when it rotates while you lift it up, the hole comes into alignment with the slot when fully seated against the case. Just like timing the distributor or magneto.

Mar 05, 2010 | 1979 Harley Davidson XLH 1000 Sportster

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