Ramius
Race Dog
Good day dogs,
I need some help from guys understanding the electrical circuit on old thumpers.
My bike don’t start. I got it going twice (each time when it was totally cold. ??? ) It didn't idle for long before it would die and then won’t start after this.
I cleaned the carb / fuel line etc. Made no difference.
I then checked compression. Measured 800kpa. Thus in good shape.
Then only did I properly check the spark..
My XT600Z (1984) gives an erratic and/or weak spark.
I’ve tested the spark by pulling of the sparkplug wire and holding on to it while kicking. It gives a very weak shock every now and then, but mostly there is nothing at all. This seems to be becoming worse between the tests after, disassembling & re-assembling everything twice now. Initially there was a weak spark on every kick.
What I’ve done to test:
1) Resistance over the Pickup coil: Measured 230 Ohm (Clymer manual spec 90 – 130 Ohm)
2) Resistance over the Source coil: Measured about 500 Ohm (Clymer manual spec something like 300 Ohm) – Will confirm this value.
3) Resistance over the ignition coil: Measured 1 Ohm (Clymer manual spec 0.27 – 0.32 Ohm)
4) Checked continuity over the 4 switches necessary to start (kill switch, ignition switch, neutral light and kick-starter switch). The last two mentioned have been bridged out on my bike. I don’t think it is a switch. All seem pretty solid.
How much tolerance in the resistance is acceptable the stator components?
Why is a resistance check over the stator of any importace? (i.e what does high / low resistance mean?)
I took the stator out on recommendation of a bike mechanic to have it tested and re-winded.
I don’t have much experience on the electrical side of things, but I do own a multi meter and is willing to learn.
Any advice, recommendations, thoughts appreciated! :thumleft: :thumleft:
Thanx PL
I need some help from guys understanding the electrical circuit on old thumpers.
My bike don’t start. I got it going twice (each time when it was totally cold. ??? ) It didn't idle for long before it would die and then won’t start after this.
I cleaned the carb / fuel line etc. Made no difference.
I then checked compression. Measured 800kpa. Thus in good shape.
Then only did I properly check the spark..
My XT600Z (1984) gives an erratic and/or weak spark.
I’ve tested the spark by pulling of the sparkplug wire and holding on to it while kicking. It gives a very weak shock every now and then, but mostly there is nothing at all. This seems to be becoming worse between the tests after, disassembling & re-assembling everything twice now. Initially there was a weak spark on every kick.
What I’ve done to test:
1) Resistance over the Pickup coil: Measured 230 Ohm (Clymer manual spec 90 – 130 Ohm)
2) Resistance over the Source coil: Measured about 500 Ohm (Clymer manual spec something like 300 Ohm) – Will confirm this value.
3) Resistance over the ignition coil: Measured 1 Ohm (Clymer manual spec 0.27 – 0.32 Ohm)
4) Checked continuity over the 4 switches necessary to start (kill switch, ignition switch, neutral light and kick-starter switch). The last two mentioned have been bridged out on my bike. I don’t think it is a switch. All seem pretty solid.
How much tolerance in the resistance is acceptable the stator components?
Why is a resistance check over the stator of any importace? (i.e what does high / low resistance mean?)
I took the stator out on recommendation of a bike mechanic to have it tested and re-winded.
I don’t have much experience on the electrical side of things, but I do own a multi meter and is willing to learn.
Any advice, recommendations, thoughts appreciated! :thumleft: :thumleft:
Thanx PL
