Honda Motor CBR250R Ignition System Circuit Schematic Diagram
Motorcycle February 13th, 2010The Honda CBR250R ignition system completed with a digital unit consists of built-in microcomputer which produces best ignition throughout its operating speed range. This pulse has seven projections. The 45 degree separation from (1) to (7), and 90 degree separation from (7) to (1). The crank position and engine rpm for each cylinder are detected from the relative position of the two pulser coils and the sever projections. Two pulser coils are installed in a way to have 15 degrees inclination from level line for PC2 end compared to PC1. This offset also called the angular offset. This is to detect the crank positions. The circuit schematic diagram can be seen in the bottom of this article.
The “O-Reference” is a time when the pulse rotor’s projection passes the PC1 pulser coil. With the o-reference, the engine rpm can be determined. Then the microcomputer will determine the ignition timing.
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August 25th, 2010 at 7:11 pm
i have a honda cbr250r and the ignition has no spark at the plug and was wondering is this a common fault and are there possible remedy whith out replacing the entire ignition.
any info on this would be greatly appreciated.
kind regards ken.
September 4th, 2010 at 4:57 pm
Hi Kent,
I hope you got your bike going. If not, you could do the following tests:
1. Check for 12 volts going into the Power Unit
2. Check for a good Ground connection to the Power Unit
3. Check for 12 volts and ‘pulsed’ voltage going into the Ignition Coils
4. Check the resistance of the Ignition Coils
5. Check the Ignition leads
6. Check for Pulse voltage at Input Circuit
September 21st, 2010 at 2:51 am
need a schematics diagram for yamaha jupiter mx-135 cc
thanks,
September 1st, 2011 at 10:25 pm
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