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  #51  
Old 29th February 2016
aswracing's Avatar
aswracing aswracing is offline
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Did you have plugs installed when you checked spark?

These crank trigger ignitions need some compression, it's how they determine the cylinder phasing.
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  #52  
Old 29th February 2016
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Originally Posted by aswracing View Post
Did you have plugs installed when you checked spark?

These crank trigger ignitions need some compression, it's how they determine the cylinder phasing.
No i did not. Wil try this.
Is it meassured by the MAP sensor?
Thanks!
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  #53  
Old 29th February 2016
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aswracing aswracing is offline
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Quote:
Originally Posted by fishman View Post
No i did not. Wil try this.
Is it meassured by the MAP sensor?
Thanks!
A guy at HD once told me it was based on the MAP sensor. But I don't think that's right, I think it's based on compression.

Bottom line, and I've seen this on crank trigger bikes that run perfectly, you remove the plugs and put a plug into it's wire and lay it on some metal to check the spark in the traditional way, and you get none. Whether it's the loss of compression or the loss of manifold vacuum that's causing it, I'm not sure. I suppose I could run an experiment to figure it out, but I'm not that curious.
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  #54  
Old 8th March 2016
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A 4 liter V8 eater A 4 liter V8 eater is offline
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Sportster/Buell Model: 883 Flat Track Racer
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Any updates?
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  #55  
Old 13th May 2018
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fishman fishman is offline
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Originally Posted by A 4 liter V8 eater View Post
Any updates?
Yess... a little late but still....
Replaced the TC88 for a Thunder Heart ignition. Way simpler setup en fired right up!
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  #56  
Old 2 Weeks Ago
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hello fishman...thanks for reply, which thunderheart ignition did you use and do you have any more pics of your bike...
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