When you get the used, worn out points in your grimy little hand don't just throw them out. Now tighten the points screw and check again.

It is usually a black wire with a white strip or a solid black wire but not always. Use a 3 by 5 card cut into 1/4" strips. If you have a query or information about BSA motorcycles please contact us. Click on the picture to the right, and you will see two marks on the crankcase and the one on the flywheel. For the most part these do not wear out and are very hard to find if you need one. Any problems with the rotor will cause a loss of output. If the point gap is bigger or smaller then the manufacturers specification you may or may not get a spark. part of the felt will pull the grease into itself, and off of the cam, giving rapid wear to the points heel. Just drag the sandpaper back and forth across a closed set of points till they are shinny. This engine rotates counter-clockwise, so the first mark is the full advance mark, and the second mark is TDC. This sends the piston backwards if you are kick starting, have your foot on the kick start lever and don't kick hard enough. Back in the day I have also heard of the Points Heel being called a Points Slipper or Lifter. Disconnect the battery negative cable, and install the meter probes in series between the battery negative post, and negative cable terminal. Check your shop manual. You can also use an ohm meter or a piece of cigarette paper. If you time an engine with a dial indicator there is no need for timing marks, however, if the engine you are working on has no timing marks, you can make your own. They tell us that evolution is true, that simple goes to complex. If your regulator is OK and it doesn't charge then you need to flash the dynamo to give some power to the field coil and start it charging. to do this you MUST use a flywheel puller. Generally, you can check motorcycle alternator stators while they're installed on the bike, using a quality multimeter. If after flashing it the dynamo does not charge there is something else wrong and it needs repairing. Two things go to one. Now adjust the point gap open or closed until the Buzz Box changes tone exactly when the moving mark on the flywheel and the stationary mark on the crankcase coincide. It sounds so easy, and it can be...

It also helps to prevent kick back. Refer to the electrical diagram in Figure 1.

Remember the timing marks must match when the paper pulls loose. Pull the Flywheel cover and find the points wire that comes out of the top of the crankcase. One is screwed to the Stator Plate and is grounded. Obviously, if there is no spark advance you time the engine at full advance. It is hard Set the multimeter to “Resistance” or “Ohms” on the lowest scale, and insert one probe into one of the stator pin sockets. Battery ignitions have 6 or 12 volts so they wear out much more quickly. One thing to remember. If you do not know the direction of rotation simply push on the kick starter lever. Rev the engine up to 3,000 rpm and read the meter. Rev the engine up to 3,000 rpm and read the meter. need a new magnet or the old one remagnetising. If you adjust the points to the right Ignition Timing,

Most (but not all) of the two-stroke engines had fixed advance. We want them to open when the piston is in the right position before Top-Dead-Center (BTDC). Make sure you put the special points grease on the points cam, and the little Lubricating Felt that presses against it. If they are off or if you are getting no spark, then we have to dig a bit deeper. It is VERY IMPORTANT to do this. To remove the flywheel nut, you have to have a way to lock the engine.

Most four-strokes, namely Hondas, can be timed in the retarded position.

When I talk about Low Tension Magnetos I mean electrical systems with a separate Ignition Coil located outside of the Magneto's Flywheel. Screw the point screw in and hook up the points wire. To get to the points, we must remove the flywheel. If you want you can turn the engine flywheel until the points open as wide as they can and then measure the point gap.

The "F" mark is when the points open and the spark occurs. The point gap regulates how much time the coils have to build up the spark.

Make sure no bits of paper get caught in the points. We see the opposite... complex goes to simple. If you show an open circuit with the “Open” or infinity reading or have higher resistance, then the stator is bad and you must replace it. Install the flywheel and retest. I usually time the Kawasakis and Suzukis in the retarded position and most Yamahas in the full advance position. Take a good look at the points wire before you change the points and reposition it on the new points in the same way.magneto_condenser.jpg. If that little felt is real dry, put a single drop of oil on it along with the grease to sort of fill up the felt. If this test shows no spark or a weak spark, troubles with the breaker points or coil inside the magneto are likely. to dry them. Be aware there are two point contacts to each set of points. Then check it.

When the points open, the paper will come loose. Check the condition of the cables. No matter how clean and well maintained you keep your bike if you offend with neglect of your points you will be guilty of all because your bike will not run. We won't go in to that here. When replacing the points wire, take a good look at how the wire is placed running to the points. That should do a few bikes. I still say REPLACE THEM. Do the same with the other end Any small bits of cotton left in the engine will burn up and not hurt any thing. Look at how much it moved and in what direction. Inspect the outboard ends of the coils for evidence of contact with the rotor. If you get a nice spark, the condenser is good.

Dip one end into the Acetone and pull it through the points. Everyone tries to sell you a new condenser but condensers rarely fail. That gives you 128 cigarette papers.

If the points are just a tad rusted you can clean them up a bit with a strip of 100 to 150 grit sandpaper folded grit side out.

I realize that these days new points may be hard to get. The tone will change when the points open. Yamaha 2-stroke singles. Insert each probe into a stator socket. This wear on the points heel causes the points to be out of time with the rotating magnet even when the Ignition Timing is set right. Just put a small drill into the holes to lock it in full advance! If you read below four amps, and all of the previous checks are good, then you need to replace your regulator-rectifier. Coil and HV wire resistance/continuity test for one-cylinder engines The next test checks for a continu-ous path for the spark through the HV wire and the ignition coil.

Some have the advance and Top-Dead-Center (TDC) marks on the crankcase and one moving mark on the flywheel. It is usually a black wire with a white strip or a solid black wire but not always. But some, like Harleys, need to be timed in the advanced position. When the points open, it disrupts this electric field, causing the spark that fires the fuel/air mixture in the engine. This Honda engine (50-70cc) is timed in the full RETARED position. Then check the timing. That means there was no variable advance of the ignition timing. When you find the points wire connect a Buzz Box to it and turn it on. If you have a lot of miles or hours of running on a set of points or if they are giving you any trouble at all, REPLACE THEM. So much for the lie of evolution. Fully authorised workshop.

Yes, I know some are soldered to the points wire. Remember to lube the Points Lubricating Felt. This article was written by the It Still Works team, copy edited and fact checked through a multi-point auditing system, in efforts to ensure our readers only receive the best information. This may take several tries to get it right. Let us start from the beginning. Motorcycle ignition systems are relatively easy to check and correct. Rats! The two marks on the left are the full advance marks. The example to the left has one mark on the crankcase and all the other marks on the flywheel. When done blow the points off with compressed air and clean with acetone. The first dynamic test allows you to check the rotor that contains the magnets and spins around the stator.

As the magnet in the flywheel spins around the ignition stator coils electricity is built up in the ignition To submit your questions or ideas, or to simply learn more about It Still Works, contact us. If you do not have at least 12.5 volts, install a battery charger and charge the battery. A lot of the small Two Strokes made by Yamaha, Suzuki and Kawasaki have spark advances.



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