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.30 -.40mm kawasaki trail boss 100 points gap.
they are a nice old trail bike similar to a kc100 engine but obviously not as many gears as your trail boss
It is pretty easy. Remove the old points then install the new set. There is a slot where the lockdown screw goes. The slot limits the adjusting range yet allows the adjusting plate to move left and right to set the timing. The lockdown screw gets snugged up just enough to hold the points assembly in place so you can stick a screwdriver inside the flywheel and into the adjusting point to move the entire points assembly. Moving the sssembly makes the timing earlier or later. A dial gage is screwed into the spark plug hole to gage the position of the piston. The timing should be set such that the points open at 1.8mm BTC.. An ohlm meter will show you the moment the points break contact. You can check the timing with a timing light if your particular machine has an index mark on the flywheel and a static mark on the case. Not everyone has a dial gage, Ohlm meter and timing light. In general, set the points gap at .012 to .015 and you should be about right. The gap is set with the arm riding on the high point of the magneto center lobe. Please take a moment and rate my answer. Thanks.
You have a 1986 454 engine with an old style breaker point ignition distributor, GM has not used a breaker point ignition for their V-8 engines since 1974, is that an older distributor or something after-market?
The ignition points dwell angle for that engine should be set at 29-31 degrees dwell (a dwell meter would be the most accurate way to set the ignition points), or a .019 in. point gap.
The spark plug gap for that engine would be .035 in. and the timing should be set at 10 degrees before top dead center.
gain access to the points, behind the side engine case. once you can see them, turn over the engine slowly, till you see the points at there biggest gap, top dead center. loosen the one screw that lets the points pivot, and adjust to the correct gap, about 14 thou, or a cardboard buisness card is the correct thickness also
Hi Cowboyx16The timing on your DT250 is 1.0 mm before top dead center. That means you will need a dial indicator to insert in the spark plug hole to measure the piston travel. You will also need a buzz box or a test light to know when the points break. Set the gap on the points @ 0.016" then adjust the backing plate up or down to get the points to open when the piston hits 1.0 mm before TDC.
Look on E-bay for an electronic CD unit that fires from the original points, but generates about 400 volts to fire the standard coil. My guess is that there is no all-electronic ignition system available even as a racing option. Ford used this engine in the Pinto line of cars from`'71 to `73, and all of them used points and condenser distributors. The points and condenser units work fine if in good order and the point gap set at .025". Hope this gives you an assist!
It sounds like the timing is off but moore likely it's caused by the point gap being to close due to wear on the rubbing block.
The gap of the points effects the timing.
You probably need to clean and adjust the points.
If that doesn't work try replacing the points and if the old one are pitted, replace the condenser also.
If that doen't work check the coil.