evo S&S piston slap?
Seasoned HDF Member
Joined: Aug 2008
Posts: 5,078
Likes: 2,150
From: Ohio
If it sounds like it's the front cylinder, give a listen to the front of the primary.
When I retarded the timing on my bike a few degrees last fall, I ended up putting in a new compensator and primary chain... quiet as a church mouse now.
The how's and why's behind what makes a compensator clatter like hell from ignition changes, aren't something I fully understand.
When I retarded the timing on my bike a few degrees last fall, I ended up putting in a new compensator and primary chain... quiet as a church mouse now.
The how's and why's behind what makes a compensator clatter like hell from ignition changes, aren't something I fully understand.
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Tourer
Joined: Sep 2019
Posts: 430
Likes: 130
From: Harley ville
If it sounds like it's the front cylinder, give a listen to the front of the primary.
When I retarded the timing on my bike a few degrees last fall, I ended up putting in a new compensator and primary chain... quiet as a church mouse now.
The how's and why's behind what makes a compensator clatter like hell from ignition changes, aren't something I fully understand.
When I retarded the timing on my bike a few degrees last fall, I ended up putting in a new compensator and primary chain... quiet as a church mouse now.
The how's and why's behind what makes a compensator clatter like hell from ignition changes, aren't something I fully understand.
my bet is when I changed the timing of the load on the piston/crank the comp is the noise I am hearing. lol... well I bet it only lasts so long on a stroker motor. any thoughts?
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Tourer
Joined: Sep 2019
Posts: 430
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From: Harley ville
Zack e
If it sounds like it's the front cylinder, give a listen to the front of the primary.
When I retarded the timing on my bike a few degrees last fall, I ended up putting in a new compensator and primary chain... quiet as a church mouse now.
The how's and why's behind what makes a compensator clatter like hell from ignition changes, aren't something I fully understand.
When I retarded the timing on my bike a few degrees last fall, I ended up putting in a new compensator and primary chain... quiet as a church mouse now.
The how's and why's behind what makes a compensator clatter like hell from ignition changes, aren't something I fully understand.
Seasoned HDF Member
Joined: Jul 2013
Posts: 11,185
Likes: 7,961
From: In my head
Can't you just ride it and get it up to temperature? I'm lost.
It doesn't need to be 85 degrees outside, you just to get on the throttle and work the gears for a half hour and it will be hot as hell. Ride it hard, she'll heat up
It doesn't need to be 85 degrees outside, you just to get on the throttle and work the gears for a half hour and it will be hot as hell. Ride it hard, she'll heat up
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Tourer
Joined: Sep 2019
Posts: 430
Likes: 130
From: Harley ville
yes when the power train comes up to temp yes it does. noise is very faint. it is barley noticeable when start up on warm days. cold days. more noticeable. tension on primary chain is dependent of temp at start up.it is a stroker motor. it most likely tears up comensators.
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Tourer
Joined: Sep 2019
Posts: 430
Likes: 130
From: Harley ville
So of course I can ride it and it warms up. and on warm days no noise. i remember setting the primary chain to 5/8 free play. shifts great. and at 75 or 80 quiet as can be. But at 38 deg. noise very loud. so shifts great. adjuster is either at 5/8 or 7/8 no in between so I set at 5/8 shifts good. food for thought boys
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Tourer
Joined: Sep 2019
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Likes: 130
From: Harley ville
98hotrodfatboy So yes, I always set at 5/8 top side of the cold adjustment. it was at 7/8 but was hard to shift. so it was really loose and I made the adjustment after the previous owner had set it up by a wiz bang. So I think it has wear patterns. AND i am only hearing it now that it is at a different tension I will say shifts better than ever and the noise is no big deal. amazing how it changes with the timing change. it changes the load on the comensator but it goes away as soon as it is warmed up. Also it is a 96" stroker. it rips. and that most likely pounds the crap out of it.
Last edited by 18deluxerider; Apr 20, 2020 at 05:29 AM.
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Tourer
Joined: Sep 2019
Posts: 430
Likes: 130
From: Harley ville
Hello all. Well I waned to bring about the final resolution of the noise proved to be the inner primary bearing proved to be the faulted as the transmission required a total overhaul. So with the correct set up. I installed the Jims one piece inner primary bearing kit. Note I also upgraded the trap door and the bearings to the larger size bearings. and converting over to synthetic 85/ 140 Hypoid gear lube and bellray primary lube. So Now I cave corrected the previous owner issues. with that area. I am now preparing for the fine tuning of the engine. bigger carb and new ignition system.
Big thank you to all who provided me wit insight.
Big thank you to all who provided me wit insight.
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