Question about 1986 kawasaki GPz 1000 RX

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Rx 100 reverse start

I recently bought a rx 100 used,without the magneto plate and flywheel.found an original plate but used another flywheel .so i took the bike to a mechanic to install the parts ,he told me that the crankshaft bearings needed replacing .when he replaced the bearings and mounted the engine .however when he tried to start the bike ,he said that it is starting in reverse.can anyone help?

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Make a couple of calls to different Kawasaki dealers in your area. Ask what direction the flywheel is supposed to turn when the engine is running. Chances are the mechanic is seeing a directional arrow on the odd-lot flywheel when the correct flywheel has the arrow going the other direction. Put the bike on the centerstand. Start the engine and put it in first gear. The sprocket should be turning counter clockwise.

Posted on May 20, 2009

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Posted on Jan 02, 2017

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Are you swapping engines? Only manual transmissions use a flywheel. Automatic equipped engines use a flex plate to mate the torque converter to the engine crankshaft. The flex plate is bolted to the crankshaft just like a flywheel, but is much smaller, thinner and with very little weight. If you do have a flex plate mounted, it must be the wrong one to match your torque converter and transmission.

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Jeffuxum:

The magneto is probably where the problem is. You'll need to pull the cover off of the motor and check the gap between the magneto and the flywheel. If the bolts holding the magneto have vibrated loose, the gap between the magneto and the flywheel will be incorrect. While you have the motor cover off, check the wiring to make sure you don't have a short in your ignition wiring and clean the air filter. I don't remember what the gap is between the flywheel and magneto, but .010 In. sounds familiar. Both legs of the magneto should be the same distance from the flywheel and they must not touch the flywheel at any point. I have used a matchbook cover between the flywheel and magneto while I tightened the magneto retention screws and it worked.

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I have removed the gearbox from my 2000 MB 100 Van. I found the clutch plate has disintergrated. I noticed the Flywheel clutch pressure face looks like it will come off. Is there more to this clutch system...


flywheel bolted to engine, clutch disk and pressure plate, also has a throw out bearing that should be replaced at the same time.
you don't need to replace the flywheel unless it is cracked though you should have it turned down at a machine shop.

Oct 11, 2012 | Mercedes-Benz Cars & Trucks

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Xt 500 has weak spark(flywheel magneto with ignition points).poor when cold and now won't even start.fuel fine.isolated ignition(magneto,coil and points).changed coil.points fine,resistance...


It sounds to me that you have done most all of what is needed. Just take some fine sandpaper to the magnets in the flywheel. After sanding, wipe it clean, then spray it with carb cleaner to remove any possible residue. Now give the magnets a spray coating of clear polyurethane coating. The flywheel will never rust again. Replace the source coil and install a new spark plug. A plug that is carboned up can lessen spark voltage. The last item is the battery. A weak one can rob power. Please rate my answer. Thanks.

Jun 03, 2011 | Yamaha Freedom Topper Motorcycles

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I am getting no spark at plug. Briggs model 31c707 motor. I have charged battery, adjusted valves, verified fuel line clear. Pull spark plug put into wire hold to motor and crank (no spark)


Hello, the next couple of things to check would be under the engine lid.

  1. Remove the screen over the air fan on the top of the fly wheel.
  2. Remove the 4 bolts securing the main lid and remove. Depending on the year of this engine it may have a secondary cover that Craftsman put on that will need to be removed first.
  3. When the lid is off you will see the magneto coil right above the spark plug; just follow the spark plug wire up to it.
  4. Use a wrench to see if the magnet on the fly wheel is strong. If the magnet is bad or really weak the flywheel will need to be replaced.
  5. Next check the magneto ground out wire. It will be a small black wire on the magneto. Unplug it then crank the engine. If the engine starts plug the wire back on the magneto and if it shuts down there is a short along the wire. It should only shut down or short out when the key is shut off. You will need to find the short if this is the problem.
  6. If the magnet is strong and the above test still fails to provide a spark then it is likely that the magneto is bad. You will need the rest of the model number; it will look something like: 31c707- # # # # - # # The part runs somewhere around $35.00 from Sears, but you might find it on-line cheaper.
  7. Replacing the magneto is pretty straight forward from there.
  8. Remove the old one and replace the old one adjusting it as far away from the flywheel as possible.
  9. Turn the flywheel until the magnet is directly across from the magneto.
  10. Put an ordinary business card between the magneto & the flywheel.
  11. Loosen the 2 screws that hold the magneto in place just enough for it to tighten up to hold the business card in place.
  12. Tighten the screws holding the magneto & rotate the flywheel to remove the business card.
  13. Test rotate the flywheel by hand a couple of full turns to ensure there is no contact with the magneto.
  14. Replace the small black wire, spark plug and spark plug wire, then test fire the engine.
  15. Shut the engine down and replace all the remaining parts in the reverse order as removed.
You should be good to go after this. If this was helpful please vote yes. Thank You!!

May 06, 2011 | Craftsman 17.5 hp 42 in. Deck Lawn Tractor...

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My Stihl ms361c won't start. Want to check air gap on the magneto.Re-set the timing.How? do I do this?


Pull off the side cover where the cord is.Make sure the keyway in the flywheel is not broke and flywheel has not turned.If flywheel did not turn the timing is fine.Too set the air gap you have to loosen the screws on the magneto .Slip a piece of paper or metal that is .010 thick between magneto and flywheel and turn flywheel until magnet pulls magneto down.tighten screws and reinstall cover.

Nov 29, 2010 | Husqvarna Garden

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Ryobi chainsaw magneto gap


The gap needs to be as narrow as possible without any actual rubbing of the rotor against the magneto. The spacing is not as critical as with spark plugs or points (remember them?) since unlike those gaps there is no spark jumping across this gap.

Generally, as long as the magnetic field is strong enough, the magneto will produce the necessary spark at the spark plug. The closer the magnets are to the coil, the stronger the magnetic field will be across the coil, and therefore the stronger and hotter the spark.

I have replaced magnetos and they are simple to install, and almost impossible to mess up if you do it this way. All you need is a piece of thin cardboard (not corrugated). I use a glossy business card without raised lettering (so it slides easily), or the like.

1) Rotate the flywheel so that the magnets are NOT positioned in front of the magneto, then loosen both screws of the magneto so it can move freely.

2) Insert the business card between the magneto and the flywheel such that the glossy side of the business card faces the rotor.

3) Then BEND the business card back over each side of the magneto (in other words away from the flywheel) so it stays fixed and can not move from side to side when you rotate the rotor.

4) Then while pinching the magneto and ends of the business card tight between your fingers, rotate the flywheel to position the magnets directly in line with the two sides of the magneto.

Note: The magnets will grab the magneto and try to move it. As long as the slippery side of the business card is facing the rotor and you haven't removed the screws, it should move fairly easily.

Since the magnets want to pull tight to the magneto, but the business card thickness is the same across the entire surface, this gives you an even spacing between both sides of the magneto and the rotor. Essentially, the magnets on the rotor do all the work for you. with regard to alignment. As long as the magnets (flat shiny polished square surfaces on the outer rim of the rotor) align directly with the two faces of the magneto, the alignment is automatic.

5) Once you have the magneto and rotor in perfect alignment, cinch down both screws in an alternating method, first just to where they start to grab, and then back and forth a few times until they are firmly tightened.

6) Now, unfold the flaps of the business card and let it move with the rotor instead. You should be able to rotate the rotor away from the magneto and the business card should slip out easily. It may stay where it was or it may slide out from the magneto - either way will work.

7) Once past the magnets, the business card should come out. You may have to move the rotor back and forth gently a few times to get it to come free. When you are done, the magneto should be in perfect alignment with the face of the rotor and the rotor should spin freely without any rubbing.

8) Confirm the above and then reassemble and go cut some trees.

Phil



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1 Answer

Lawnboy gold series 10400, sn 4906038, failure to fire. Possible bad magneto. Looking for replacement part and magneto settings; i.e., gap between flywheel and the magneto. Any other tips appreciated.


You should be able to get a new magneto at any local lawnmower repair shop. The proper gap can be achieved using a standard business card. When you get the new mqagneto, turn the magnets on the flywheel to the opposite side away from the magneto, replace the magneto pulling it all the way back away from the flywheel and "snug" 1 or both of the mounting screws.
Now, turn the flywheel magnet to where it is centered under the magneto, insert the business card between the flywheel and magneto and loosen the screw you tightened earlier. Magneto will pull down tight to the magnet. Tighten both screws then rotate the flywheel to remove the business card

Sep 22, 2009 | Garden

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My walk behind mower wont start..has no spark with new plug or old one could it be a rusty magneto


Rust on the magneto has no bearing on the output of a spark. The magneto or the points if it has them could be the problem. If the unit has points they may be under the flywheel. If so equiped, that would be the logical place to start. If no points, I would replace the magneto. When you place the new one on, place a piece of paper between the flywheel and the magneto. When you tighten the magneto, pull out the paper and turn the flywheel by hand. If the magneto turns without touching, put everything together and try it out. Good luck...Lee

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