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No Spark

  • EricDT
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No Spark was created by EricDT

Hey DT Riders,
I have a '73 DT3 250 and I've had the stator restored with new points and condenser. The gap is set right, the Ignition coil is new, and appears to have voltage reading on volt meter when kicked over. No spark at the plug with cap attached. Any ideas will be appreciated. Thanks
11 Aug 2022 17:35 #1

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Replied by alnarv on topic No Spark

Start by cleaning those points. New points often have a film which prevents good contact. Spray with contact cleaner (or even rubbing alcohol) then close them against a clean business card and pull thru.until it comes out clean.
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12 Aug 2022 05:28 #2

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Replied by Andy_C on topic No Spark

Is the pug new or old - even new plugs can sometimes fail, worth trying another plug.
Also plug cap - is it a resistor cap? sometimes they fail.
 
Ex Yam DT400C, Triumph Trident 660, Triumph 865, Kawasaki KH 400
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12 Aug 2022 08:30 #3

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  • YamahaForumUsername
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Replied by YamahaForumUsername on topic No Spark

is the key in the ignition and turned to first or second position.
13 Aug 2022 08:41 #4

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Replied by EricDT on topic No Spark

I think it is a resistor cap. I'll try another cap. Thank you
15 Aug 2022 15:24 #5

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Replied by EricDT on topic No Spark

I usually try the second position. Thank you.
15 Aug 2022 15:25 #6

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Replied by EricDT on topic No Spark

I sanded the point with 600 grit, Now I'll try cleaning with alcohol and business card. Thank you!
15 Aug 2022 15:27 #7

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Replied by RT325 on topic No Spark

Run the black from the mag direct to the plug coil to eliminate any problems elsewhere.
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15 Aug 2022 16:40 #8

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Replied by OkieDeric on topic No Spark

If it is a resistor cap use a non resistor plug.  I had the same thing with my dads 72 250.  No spark with the NGK BR8ES but spark with the B8ES I pulled out of my Honda.  We used a champion plug which cross referenced with the B8ES.
22 Aug 2022 12:24 #9

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Replied by Swoop56 on topic No Spark

Another solution would be to change to a non resistor cap . Then you could use
the readily available resistor plug .
22 Aug 2022 12:58 #10

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