Dr.Shifty
I've had my bike at AAMC in Melbourne having some work done, including a dyno tune. Rick and Jaden were having problems with the mapping as the bike kept on losing power at odd times.

When they went looking they found the knock sensor wire was sitting on the head fins and had melted through. The result was that the ECM thought the motor was knocking when it wasn't and pulled the timing right back, resulting in power losses. Rick said it was losing up to 20 hp at the rear wheel. 😲

They replaced the sensor under warranty but I thought it was worth it to post the problem here. I've seen a couple of threads on the same problem on the international forum, and the issue seems to date back to the 2014 bikes.

It would seem to be an easy thing to hold the wire off the heads when the loom is wired up, but the issue continues. Chasing the power loss down when the bike was on the dyno cost Rick and Jaden a lot of time. They were conscious that I'd ridden down from Newcastle to have the work done on the bike and wanted to see the bike on the road as soon as possible.

So, a high five to Rick and Jaden.

And to Indian, lift your game!
Cheers, Kim.

From Woodrising (no, nobody else has heard of it either)
Rides a Springfield Dark Horse
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Hunter
Very interesting. I kind of wonder if that's  what was causing V-twin's "flat exhaust noise" on his first bike. It sounds pretty similar anyway.
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Damich
Yeah I saw it yesterday as I popped into AAMC. Nice pick up from them. 
Damian
North East Melb
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V-Twin
Hunter wrote:
Very interesting. I kind of wonder if that's  what was causing V-twin's "flat exhaust noise" on his first bike. It sounds pretty similar anyway.
Good memory Hunter.

Just in case anyone reading this is interested, that issue and the clacking on my 12 months old bike (which spent couple of months at the Melbourne workshop ‘examined’ - in reality, it just sat their collecting dust) were the reasons for trading-in and buying another Indian.

Hey Shifty, did your exhaust ever change in sound?  Go quieter (like on my video)?  The best guesstimate I subscribe to is that my old bike may have had ‘hydraulic lifter’ issue and valves didn’t open properly.  It was definitely rare situation.  I was only ever able to find one other person in the States who had the same issue.
Let's be kind to one another.
Melbourne, Victoria
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Dr.Shifty
I haven't noticed any reduction in exhaust noise, but I wear ear plugs and apparently it was when the bike was in the upper half of the rev range that it was losing track of itself, where noise increases anyway.
Cheers, Kim.

From Woodrising (no, nobody else has heard of it either)
Rides a Springfield Dark Horse
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V-Twin
Dr.Shifty wrote:
I haven't noticed any reduction in exhaust noise, but I wear ear plugs and apparently it was when the bike was in the upper half of the rev range that it was losing track of itself, where noise increases anyway.
Thanks Shifty, 

Based on your information, your situation does sound different to my situation.  Appreciate your clarification.  Glad your situation was rectified.  It was also good to catch up with you for lunch before you headed home.  Take care!
Let's be kind to one another.
Melbourne, Victoria
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Dr.Shifty
Here's a pic of the knock sensor. You can see the damage just up from the fitting. There is more on the underside of the cable but it didn't want to sit in the right position for me to take the pic.

The sensor is bolted to the front cylinder, back surface, somewhere in behind the arrow head cover on the right side of the motor.
 
Rick had not come across this failure before, but I'd seen mention of it on the international forum. He said when he chased up Polaris stock availability they had 8 in stock, which he says in an indication that they know it can be a problem.

knock sensor 01.jpg 
Cheers, Kim.

From Woodrising (no, nobody else has heard of it either)
Rides a Springfield Dark Horse
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