MELLERS
21-11-2002, 11:17 AM
THOUGH I HAVE DONE THESE TESTS MANY TIMES AND HAVE HAD NO PROBLEMS I WILL NOT BE RESPONSIBLE FOR ANY DAMAGE TO YOU OR YOUR BIKE WHICH MAY ARISE AS A RESULT, THERE ARE HIGH VOLTAGES EXPOSED DURING THESE TESTS!
The following advice assumes that you have already done the usual tests for bad plugs, plug cap resistance above 5Kohm, HT coil tests as per manual etc.
SO, step by step..
The usual haynes manual resistance checks on the source coil use a standard multimeter with low voltage output which is insufficient to reveal insulation which only breaks down under a high voltage load so just because your resistances are the same as those in the manual does NOT mean the coil is ok, therefore the best test is a voltage check. You will need an ANALOGUE voltmeter to show the results properly, I do use a digital multimeter to do my tests but it is a very very good one worth far more than my TZR! (Borrowed from work!!)
1.disconnect the generator leads from the rest of the loom and identify the source coil connections ( on my 2rk TZR125 it is done between the Black/Red wire and earth) then connect your meter as appropriate.
2 . Switch your meter to read 100v AC and then measure the voltage while you kick the bike over or spin it on the starter (Flash git!) You should read OVER 50v and preferably closer to 100v if not then the generator is more than likely fudged (sorry!)
3.While the generator is disconnected identify the pulser coil output (on mine it is between either the White/Green or White/Red wire and earth try both cos i cant remember :oops: ) Set the scale much lower on your meter (Min 2v Max 10v depending what options you have) and check that the needle "kicks" with every revolution. (this is the pulse which fires the cdi system and cause the spark as mentioned earlier)
4. If the generator passes the above tests then smile, start breathing again and reconnect it!
5. Read the next topic "Ignition and kill switch testing"
NOW HAVE A CUP OF TEA! (If it passed these tests it saved you what would be £132 new!)
The following advice assumes that you have already done the usual tests for bad plugs, plug cap resistance above 5Kohm, HT coil tests as per manual etc.
SO, step by step..
The usual haynes manual resistance checks on the source coil use a standard multimeter with low voltage output which is insufficient to reveal insulation which only breaks down under a high voltage load so just because your resistances are the same as those in the manual does NOT mean the coil is ok, therefore the best test is a voltage check. You will need an ANALOGUE voltmeter to show the results properly, I do use a digital multimeter to do my tests but it is a very very good one worth far more than my TZR! (Borrowed from work!!)
1.disconnect the generator leads from the rest of the loom and identify the source coil connections ( on my 2rk TZR125 it is done between the Black/Red wire and earth) then connect your meter as appropriate.
2 . Switch your meter to read 100v AC and then measure the voltage while you kick the bike over or spin it on the starter (Flash git!) You should read OVER 50v and preferably closer to 100v if not then the generator is more than likely fudged (sorry!)
3.While the generator is disconnected identify the pulser coil output (on mine it is between either the White/Green or White/Red wire and earth try both cos i cant remember :oops: ) Set the scale much lower on your meter (Min 2v Max 10v depending what options you have) and check that the needle "kicks" with every revolution. (this is the pulse which fires the cdi system and cause the spark as mentioned earlier)
4. If the generator passes the above tests then smile, start breathing again and reconnect it!
5. Read the next topic "Ignition and kill switch testing"
NOW HAVE A CUP OF TEA! (If it passed these tests it saved you what would be £132 new!)