Pinging/detonation when hot
Club Member
Joined: Feb 2007
Posts: 16,320
Likes: 306
From: Boynton Beach, FloriDuh
You must have lots of money to burn..........
Lot's of folks experience the same thing...they are routing the dirty oily air from the breathers back into the combustion chamber.
Many just de-tune the bike by retarding the timing periodically.
You are on the right track running the water to get rid of the carbon build-up.
Once you do, then the next step is to get an air cleaner and breather system that routes that into the atmosphere instead of into your engine. It will run better and last longer.
Many just de-tune the bike by retarding the timing periodically.
You are on the right track running the water to get rid of the carbon build-up.
Once you do, then the next step is to get an air cleaner and breather system that routes that into the atmosphere instead of into your engine. It will run better and last longer.
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DKCustomProducts.com
Club Member
Joined: Feb 2007
Posts: 16,320
Likes: 306
From: Boynton Beach, FloriDuh
Lot's of folks experience the same thing...they are routing the dirty oily air from the breathers back into the combustion chamber.
Many just de-tune the bike by retarding the timing periodically.
You are on the right track running the water to get rid of the carbon build-up.
Once you do, then the next step is to get an air cleaner and breather system that routes that into the atmosphere instead of into your engine. It will run better and last longer.
Many just de-tune the bike by retarding the timing periodically.
You are on the right track running the water to get rid of the carbon build-up.
Once you do, then the next step is to get an air cleaner and breather system that routes that into the atmosphere instead of into your engine. It will run better and last longer.
Road Master
Joined: Apr 2012
Posts: 1,188
Likes: 24
From: New Hampshire
well that will work if he is able to back it out. if not what do you suggest? i don't need any more money as i'm going on my 3rd year detonation free without the need to adjust anything. i was simply sharing my experience with harley tuning and pinging and how i cured it. i'm not so sure it is as easy as just changing the timing with efi maps. guess he can have at it is he feels safe doing it.
Last edited by IRON1250; Jul 16, 2013 at 04:28 PM.
Club Member
Joined: Feb 2007
Posts: 16,320
Likes: 306
From: Boynton Beach, FloriDuh
He already has a SEPST "tuner" which means he can adjust the timing. It shouldn't take more than a few minutes to subtract 2* of advance from the current map and save a copy of the new "summer" map. If you keep the 2 maps on a laptop, it's a pretty simple 5 minute process to upload the summer map at the start of summer, and reload the normal map in the fall.
Road Master
Joined: Apr 2012
Posts: 1,188
Likes: 24
From: New Hampshire
He already has a SEPST "tuner" which means he can adjust the timing. It shouldn't take more than a few minutes to subtract 2* of advance from the current map and save a copy of the new "summer" map. If you keep the 2 maps on a laptop, it's a pretty simple 5 minute process to upload the summer map at the start of summer, and reload the normal map in the fall.
However, the OP said-
I have about 9000 miles on my 1250 conversion, bike runs great and most of the miles were put on last summer when it was even hotter and I never heard any pinging then.
This is a classic example of the bike running great and then later (in the same or similar conditions) beginning to ping because of carbon build-up.
Almost always carbon build-up is due to the hot dirty oily air being fed back into the combustion chamber.
Road Master
Joined: Apr 2012
Posts: 1,188
Likes: 24
From: New Hampshire
He already has a SEPST "tuner" which means he can adjust the timing. It shouldn't take more than a few minutes to subtract 2* of advance from the current map and save a copy of the new "summer" map. If you keep the 2 maps on a laptop, it's a pretty simple 5 minute process to upload the summer map at the start of summer, and reload the normal map in the fall.
Last edited by IRON1250; Jul 17, 2013 at 10:10 AM.
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Road Master
Joined: Aug 2011
Posts: 858
Likes: 17
From: victoria bc
Thanks for the replies guys. One of the things I wanted to know was if this is a common problem and it sounds like it may not be common but there are others that have experienced the same issue. Interesting to hear that other people have to change their timing a bit during the hotter time of the year. It will be easy enough to change maps if I find it necessary.
I do think that carbon buildup has something to do with it since I had no pinging last year. One day when I am not spending money on my mountain bike all the time I plan on getting a AC that does not vent into the intake. I do not have oil leaking from my AC but when you pull it off there is oil all over the intake.
This morning before work I spent a few minutes and rolled back my timing between 3 and 5 degrees and it definately seemed to help. Less ping on the way home and the bike still ran very well. I am going to retard it a bit more in the low to mid rpm range through all throttle positions and see if that gets rid of the last bit of ping.
I ran a couple of cups of water through my intake today with a sprayer when the engine was hot but I never saw anything come out of the pipes. No smoke or soot.
If anyone doesn't really think a lot of carbon can build up after 10000 miles, the picture below is of the stock 883 pistons with about 2000 miles on them when I removed them during my 1250 conversion.
I do think that carbon buildup has something to do with it since I had no pinging last year. One day when I am not spending money on my mountain bike all the time I plan on getting a AC that does not vent into the intake. I do not have oil leaking from my AC but when you pull it off there is oil all over the intake.
This morning before work I spent a few minutes and rolled back my timing between 3 and 5 degrees and it definately seemed to help. Less ping on the way home and the bike still ran very well. I am going to retard it a bit more in the low to mid rpm range through all throttle positions and see if that gets rid of the last bit of ping.
I ran a couple of cups of water through my intake today with a sprayer when the engine was hot but I never saw anything come out of the pipes. No smoke or soot.
If anyone doesn't really think a lot of carbon can build up after 10000 miles, the picture below is of the stock 883 pistons with about 2000 miles on them when I removed them during my 1250 conversion.
Last edited by Mich; Jul 16, 2013 at 08:06 PM.
