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Dual morris magnetos manual ******/auto advance..installed on 113" Patrick racing engine..supposedly dialed in upon arrival. am totally unfamiliar with the double set-up but informed that only rear mag needs retarding for a start-up. confirmation before lift-off would be appreciated... @

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Hi, Bojiman4u for more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.

Posted on May 01, 2019


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Posted on Jan 02, 2017

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SOURCE: how to repair a joe hunt or morris magneto


Posted on Mar 21, 2010

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SOURCE: 68 sportster not firing

That could be by design or the problem. I don't have diagnostics for those however. If you have a loose wire look for connections anywhere within reach of that wire.

Posted on Nov 23, 2011

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How to resolve Ignition interference on racing go cart with bpr40

try installing a condensor in the system
if the magneto has points set it up the same as a distributor as the interferenve will be from the spark across the points
if the interference is scross a radio network try using shielded cables in the radio set up

Mar 23, 2018 | Road Motorcycles

1 Answer

Tech tips motorcycle magnitos

Hi Anonymous, please visit the website below and good luck.
MM74E Morris Magneto Installation on Shovel Head Harley Davidson Motorcycle

Btw, I’m available to help over the phone in case u need at

Jan 06, 2014 | 1993 Harley Davidson XLH Sportster 883

1 Answer

Have got a joe hunt magneto and i want to put it into my triumph 750 1970 model is there a diagram for this or is there instructions on how to install it

I ran one of those on several 60s-70s Triumphs.....great ignition!

Both plugs fire at the same time so there is no left/right to worry about.

Remove spark plugs and gap .018. Remove timing cover (right hand side of engine) over battery ignition points.
Disconnect and tape (insulate) all battery connected wires. Better yet, unhook battery hot wire from battery terminal.
Hold breaker cam in opposite direction of rotation (advanced position) and rotate engine until the points on #1 cylinder just start to open. Note: Use .0015 feeler gauge.
Remove breaker plate, breaker cam advance mechanism, and dowel pin from internal taper if your model used a dowel pin to position breaker cam and advance mechanism. CAUTION Do Not Rotate Engine. If engine is rotated, reverse rotation until piston is down and the cylinder at least one inch before top center on the compression stroke.
Rotate engine in normal direction of rotation until piston is 5/16 from top center on compression stroke. Install magnetos adaptor plate and adaptor shaft in cam taper. DO NOT TIGHTEN SHAFT. CAUTION 1963 to 1970 Triumph unit construction twins have a different length taper on shaft and internal threads are dissimilar. Suggest checking threads and taper. 1963 to 1970 bolt has BSF 1/4 x 26 threads. 1971 and later bolt had 1/4 x 28 thread. Early shafts are marked with the letter "A". Later shafts are marked with "B".
NOTE: Some applications will require drilling and tapping engine with 1/4 x 20 for better security of magneto mounting adapter. Some customers with severe service report that they heli aced adaptor to cam cover with approximately one inch length bead, top and bottom for security.
Remove Magneto cover. With shaft slightly loose in taper mount Magneto so that points are just starting to open and bolts are approximately in center of slot (for timing adjustment later).
Carefully remove Magneto and tighten center bolt in shaft. Re-install Magneto and time. Install cover and plug wires. Hook up ground wire to a separate kill switch to ground only. DO NOT HOOK ANY BATTERY CURRENT TO MAGNETO.
Point Gap .012 to .015

Aug 02, 2011 | Triumph Bonneville Motorcycles

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.


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

1 Answer

Have a1975 175 enduro, acts like needs timeing, can't figure out how to check or adjust. Got any help?

Before I explain the timing, I want you to check the crankshaft bearing on the left side, (shifter side), of the bike. Just remove the left side case cover and then hold the magneto firmly in your hand and then lift up and down then left and right. If the magneto is not rock solid you will need to install new crank bearings and seals. Any movement in the magneto means the timing will be jumping around.

Now, the timing. This bike is timed at 1.8mm BTC. Race timing is 2.0mm BTC.. You need a dial guage and an olmmeter to set it properly. Remove the spark plug then screw the dial gage mount into the spark plug hole. GENTLY run the piston towards TDC. At tdc setthe guage to zero then back the piston down, still on the compression stroke. Attach the olmmeter to the points and to ground. Run the pisten back towards TDC and set the points such that they open at the 1.8 or 2.0mm advance point. Setting the points is simply a matter of rotating the points base plate left or right as needed to achive opening at the proper piston position, 1.8 or 2.0..

There is a notch in the base plate which you can use to set the points. You can make the adjustment by loosning the base plate and useing a flat screwdriver to move the base plate. It has been 30 years since I worked on a 175 Yamaha. I dont recall if the magneto has a timing mark on it or not. I think it does. If so, the first of two marks is the timing mark. The second mark is TDC. You can start the bike then use a timing light to check the timing. Stop the engine, make an adjustment, start again and check with the timing light, etc., etc., until is is set where it should be. There will be a mark on the center case that the magneto marks will line up with if there are indeed marks on the magneto. It would probably be advisable to file the points as they may well be pitted from usage. Please rate my answer.


Sep 16, 2010 | 1974 Yamaha DT 360

1 Answer

I need a wiring diagram for 99 Oldsmobile Alero fuel pump and/or entire fuel system. Don't have time to wait for manual to arrive.


Apr 02, 2010 | 1999 Oldsmobile Alero

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