Power vision counting knocks
Stellar HDF Member
Joined: Sep 2007
Posts: 2,459
Likes: 674
From: Vancouver Island B.C.
Maybe you missed my point? If it is too lean removing timing is the wrong first step.
Seasoned HDF Member
Joined: Dec 2005
Posts: 19,921
Likes: 8,026
From: poway
Why? IMO it'll be a good indicator.. The motor will cough.. Now adding timing to a lean motor will cause damage..
Stellar HDF Member
Joined: Mar 2012
Posts: 2,019
Likes: 599
From: Columbus, OH
Ride the bike and log data (make sure you log in .csv format), I would do one log riding normal and one where you try to make it happen. Get a program where you can graph the logs, Mega log Viewer or Win Pep 8 are a couple. in one graph look at your knock events and in another look at TPS, RPM and MAP find out where your knock events are happening in which cylinder, then look at what's happening just before the knock event occurs and the find the same spots in your tuning tables, either add some fuel via the VE tables if that looks low or remove a couple degrees of timing,
Thread Starter
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Novice
Joined: May 2025
Posts: 23
Likes: 1
From: Kapuskasing Ontario Canada
You may want to change your plugs to stock, some aftermarket have caused false knock events
Ride the bike and log data (make sure you log in .csv format), I would do one log riding normal and one where you try to make it happen. Get a program where you can graph the logs, Mega log Viewer or Win Pep 8 are a couple. in one graph look at your knock events and in another look at TPS, RPM and MAP find out where your knock events are happening in which cylinder, then look at what's happening just before the knock event occurs and the find the same spots in your tuning tables, either add some fuel via the VE tables if that looks low or remove a couple degrees of timing,
Ride the bike and log data (make sure you log in .csv format), I would do one log riding normal and one where you try to make it happen. Get a program where you can graph the logs, Mega log Viewer or Win Pep 8 are a couple. in one graph look at your knock events and in another look at TPS, RPM and MAP find out where your knock events are happening in which cylinder, then look at what's happening just before the knock event occurs and the find the same spots in your tuning tables, either add some fuel via the VE tables if that looks low or remove a couple degrees of timing,
Stellar HDF Member
Joined: Mar 2012
Posts: 2,019
Likes: 599
From: Columbus, OH
I will definetly try that, I do have Win pep 8 and Ive graphed the data logs already but Im not the greatest on reading those type of things and figuring out the issue haha I will change the plugs out for Harley plugs, I did also notice the pv4 has auto tune features available but was wondering if the bike needed O2 sensors to use it, or are some parts of the auto functioning still ie. if the auto tune is on and the bike counts a knock would it pull timing by itself?
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Novice
Joined: May 2025
Posts: 23
Likes: 1
From: Kapuskasing Ontario Canada
alright sounds good Ill data log some more, swap the plugs and try and figure out how to read the graphs hahah
Stellar HDF Member
Joined: Sep 2017
Posts: 2,144
Likes: 577
From: memphis
how old are the plug wires. replacing mine cured those events on the PV.
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Thread Starter
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Novice
Joined: May 2025
Posts: 23
Likes: 1
From: Kapuskasing Ontario Canada
Stellar HDF Member
Joined: Sep 2017
Posts: 2,144
Likes: 577
From: memphis
yes..just like yours i never heard it ping. they were the original wires.