Project DTZr.....a DT125R love story
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@Calum said in Project DTZr.....a DT125R love story:
@Hark_Ptooie If the spark plug gap isn't set correctly than the spark can just break down at too high a load. The spark plug annodes are saturated with voltage from the HT coil, if the gap is incorrect then this will cause issues.
Ah - makes sense.
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@Hark_Ptooie I'll refresh the soldering as soon as possible because this problem drives me crazy.Everything is almost ready except this and cannot go for technical inspection.
@Calum I'll order a new spark plug cap from Yamaha dealer,although the current is within specs and the original one.I prefer to have a backup if not used
@SpookDog no such box on this model,It matches the cable harness of 3RN1 to 3RN9 of Haynes manual or the 3NC that @HOTSHOT-III posted to another thread if memory serves correctly.Side stand switch connects with negative and then to CDI blue/yellow.
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@HOTSHOT-III said in Project DTZr.....a DT125R love story:
The actual coil on DTRs is very good quality so it's well worth fitting a new lead even to an older one; you can cut off the very top of the coil's outer case where the lead pushes in with a junior hacksaw, pull out the old lead and solder the new one to the coil output for a really good connection. Then re-waterproof using Shoe Goo and electrical tape. Looks messy but no-one can see it under the tank.
Do you have any photo to see what you did,it's interesting to know,I have an old one with short cable.
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Sorry to keep on asking about the side stand switch stuff. Your CDI must have an embedded controller…
If I was you I’d try: running a new wire from the magnetic pickup to the CDI, also the wire from the CDI to the coil. You’ve swapped out everything else electrical that I can think of for the time being…
The ‘resolution’ of the ignitions ‘pulse’ is loosing ‘fidelity’ somewhere. There can’t be that many places left to look… -
I didn’t realise you were still having this problem!
I need to go back over and read it again…Is your bike one of the ones deristricted with the read switch?…
Edit: Just read back some and I’m interested in the ‘sparks from side to centre’ bit.
Did you ever swap out the CDI?… -
My memory doesn’t serve me very well bud! 😜
If it’s still doing the weird spark I’d try replacing the orange wire that runs to the coil, as far back as possible. It sounds like you may have a break inside the insulation, that is causing a weak or intermittent spark…
No plug should spark like you stated when it’s dry and clean…
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Pin the valve then if it still does it you know its not the servo
The black an white wire ( kill switch to cdi ignition ) can cause it to.spark every other kick.but yours is getting to 5000 rpm so I doubt it's that
One thing to remember half the wires in these looms the copper has turned black even though they look OK on the outside