Valve Clatter
Tourer
Joined: Nov 2013
Posts: 268
Likes: 5
From: SC
I didn't see it mentioned by anyone else so I'll throw this out there as well, it's very possible what your hearing is cam reversion through the throttle body. If you've never had a cammed bike before this will definitely be a sound you haven't experienced before. It's a very distinct clucking sound. Not saying this is your issue because the 255's are known to ping but just throwing this on the table as a possibility of what your hearing.
If you have a free flow intake, you may just be hearing reversion. If so, there is nothing you can do except try to put a cover over the filter (I bent aluminum and put it over the filter and under the cover where the filter faced me, and it helped a little) and/or ride it.
Seasoned HDF Member
Joined: Jun 2006
Posts: 30,875
Likes: 32,915
From: King George, VA
I'll iterate the issue about having the work done at a dealer.
Find an independent Harley shop that is authorized to do warranty work. Plenty of them out there. Also, a dyno tune will do a whole lot better than a "One Size Fits All" map.
Find an independent Harley shop that is authorized to do warranty work. Plenty of them out there. Also, a dyno tune will do a whole lot better than a "One Size Fits All" map.
Road Warrior
Joined: Nov 2014
Posts: 1,962
Likes: 140
From: NY
I didn't see it mentioned by anyone else so I'll throw this out there as well, it's very possible what your hearing is cam reversion through the throttle body. If you've never had a cammed bike before this will definitely be a sound you haven't experienced before. It's a very distinct clucking sound. Not saying this is your issue because the 255's are known to ping but just throwing this on the table as a possibility of what your hearing.
Not with 255's because they are mild cams with short cam timing/not long on duration and its only long duration perf cams that have issues with reversion.
Now if at same time cams were installed he also went to an open air cleaner then maybe he is simply hearing common intake noise when he opens throttle a lot more for hills,maybe he's lugging it too much requiring more then normal throttle opening to climb hills when he should downshift.
But if its not that then the higher cyl pressure the mild 255 cams with short duration case can cause detonation on thodays 93 octane fuel esp if it's got 10% ethanol.
Scott
Last edited by wscott; Apr 7, 2017 at 08:42 PM.
Seasoned HDF Member
Joined: Mar 2010
Posts: 19,980
Likes: 6,107
From: Florida
When I cammed my bike a couple years ago, I hadda choose between 255s & 254e's. I chose the 254e because it has the same low end roll on torque, but better mid range, and doesn't have the hot start or starter-kill issues issues the 255s have. Nor did it need the ACRs that 255s need. Without them, you will chew up starter motors.
Thread Starter
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2nd Gear
Joined: Jun 2014
Posts: 6
Likes: 0
From: Frankfort Ky
Well here is what I've got. 2010 FLHTK 103, Stage 1 air intake kit, 255 H-D cams W/new cam bearings and lifters. V&H dresser duals with twin slash mufflers. Always run 93 octane gasoline and avoid stations with ethanol. I never lug the bike when riding and am hearing the noise in the 2000 to 2600 RPM range. The bike starts right up every time but idles rough. Sometimes she acts like she wants to cut out or (stutter) when you go to take off and gets a little aggravating at times but it doesn't die. She's going back to the H-D dealer this morning for another round of diagnosis. Hope they get it right this time, because this will make my third trip back since the initial cam swap and I'm getting a little aggravated. Thanks for the comments and suggestions.
Last edited by LuckyHDOney; Apr 8, 2017 at 06:37 AM. Reason: Clarification
============
Not with 255's because they are mild cams with short cam timing/not long on duration and its only long duration perf cams that have issues with reversion.....
Now if at same time cams were installed he also went to an open air cleaner then maybe he is simply hearing common intake noise when he opens throttle a lot more for hills,maybe he's lugging it too much requiring more then normal throttle opening to climb hills when he should downshift.
But if its not that then the higher cyl pressure the mild 255 cams with short duration case can cause detonation on thodays 93 octane fuel esp if it's got 10% ethanol.
Scott
Not with 255's because they are mild cams with short cam timing/not long on duration and its only long duration perf cams that have issues with reversion.....
Now if at same time cams were installed he also went to an open air cleaner then maybe he is simply hearing common intake noise when he opens throttle a lot more for hills,maybe he's lugging it too much requiring more then normal throttle opening to climb hills when he should downshift.
But if its not that then the higher cyl pressure the mild 255 cams with short duration case can cause detonation on thodays 93 octane fuel esp if it's got 10% ethanol.
Scott
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Well here is what I've got. 2010 FLHTK 103, Stage 1 air intake kit, V&H dresser duals with twin slash mufflers. Always run 93 octane gasoline and avoid stations with ethanol. I never lug the bike when riding and am hearing the noise in the 2000 to 2600 RPM range. The bike starts right up every time but idles rough. Sometimes she acts like she wants to cut out or (stutter) when you go to take off and gets a little aggravating at times but it doesn't die. She's going back to the H-D dealer this morning for another round of diagnosis. Hope they get it right this time, because this will make my third trip back since the initial cam swap and I'm getting a little aggravated. Thanks for the comments and suggestions.