Cause of a weak spark on a 34l?
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Howmuch?!
- No Gold Stars Yet

- Posts: 1
- Joined: Sun Apr 19, 2015 8:08 pm
- What Bike or Bikes Do You Own?: 34l
- Previously Owned Bikes: .
- Location: Shefford, UK
Cause of a weak spark on a 34l?
With my bike difficult to start,earthing the spark plug to the engine i'm not seeing a nice fat healthy blue spark. Changed the spark plug,no difference.The primary coil measured 20 ohms & 16 kilo ohms for the secondary.Is this about right?
If so, could it be the CDI? Is there any checks to prove this?
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Eric66
- Financial

- Posts: 922
- Joined: Tue Aug 23, 2011 7:20 am
- What Bike or Bikes Do You Own?: XT600Z 83 Tenere
- Previously Owned Bikes: XT 250,XL 500,KLR600,XT600Z Tenere 83,Ducati 900SS 81
- Location: QLD, Australia
Re: Cause of a weak spark on a 34l?
All 3 of my 34L's show a pretty faint spark, not what you would normally expect but they all start first kick.
Regards Eric
Regards Eric
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ActionManMelb
- Founding Member

- Posts: 1052
- Joined: Thu Mar 31, 2011 7:50 am
- Location: Melbourne, Australia
Re: Cause of a weak spark on a 34l?
Before you blame the spark...how does the bike run once you get it running?
If it keeps running without miss-fire and accelerates hard when required, then you should look elsewhere for the problem.
If it keeps running without miss-fire and accelerates hard when required, then you should look elsewhere for the problem.
"Don't worry," he said, "things could be worse ........."
So I stopped worrying and lo and behold, things did get worse!
So I stopped worrying and lo and behold, things did get worse!