Dead Chopper

[NZBigDog]

Yep, glad we can help.


I have a question for the other guys out there that have replaced their sensors....
Have you replaced it with a Big Dog Sensor that has the electronics molded to the alloy disc OR have you replaced it with a Harley or aftermarket one that has the electronic part just held against the disc by a tab...
The reason I ask is because I suspect that maybe the Big Dog sensor have a higher fail rate because of the heat being transferred from the block, into the alloy disc and then into the electronics. On the sensors with the tab, the heat transfer will not be as efficient so the electronics are not getting as hot and lasting longer.....

This is just a thought, what do you guys think??

 

[ZeDevil]

NZBigDog, I think it's the other way around. The Big Dog sensors have a better area to dissipate heat. But personally, I didn't feel any difference - I used both aftermarket sensors and OEM. All of them went bad in a week or so because of too much heat from running lean.

Now I got some 15-20k miles on a second hand big dog sensor. Engine tuned right, everything works fine.

 

[NZBigDog]

ZeDevil that's good to know.
When mine died I had to get it on the road that arvo so someone gave me a 2nd hand Harley one....I think it would have been 15 years old ...its still going now.

Just a note though, these things produce very very little heat so they don't need a Heat sink...all the problems will be heat transfer from the block.