Wrong Stage IV Installed
Thread Starter
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6th Gear
Joined: Sep 2021
Posts: 13
Likes: 1
From: Queensland
Wrong Stage IV Installed
Ordered and had installed Screaming Eagle Stage IV upgrade for my 2020 Deluxe from my local dealer, 107 to 128. Collected it today and they mistakenly ordered and installed the wrong kit, 114 to 131. They are very apologetic and it will be back in on Monday to install the correct kit, but having driven it home and back there, I am concerned of any damage to anything on the bike from the incorrect kit?!?
They said the only difference between the two are the pistons, and assure me there is no concern. I dont know enough about the technical side to be confident it will be ok, I trust the dealer, but do you have an opinion?
They said the only difference between the two are the pistons, and assure me there is no concern. I dont know enough about the technical side to be confident it will be ok, I trust the dealer, but do you have an opinion?
Road Warrior
Joined: Sep 2016
Posts: 1,952
Likes: 903
From: South Florida (Ft Myers area)
Is there actually a difference in the kit? I am pretty sure the different stroke from the 114 and 107 are the difference in CI.
The bore is the same, pretty sure the exact same pistons as well, anyway, I can't see why it would be a problem if nothing happened on start up, except it seems the dealer doesn't have a clue.
The bore is the same, pretty sure the exact same pistons as well, anyway, I can't see why it would be a problem if nothing happened on start up, except it seems the dealer doesn't have a clue.
Seasoned HDF Member
Joined: Aug 2007
Posts: 21,736
Likes: 17,577
From: Driftless Area
I'm guessing, but base cylinder thickness might be an issue. If it's too thin, I've heard of the flange breaking off. If that hasn't happened, you should be OK.
I would be concerned about how you get that far into an engine without noticing the parts aren't the right ones.
I would be concerned about how you get that far into an engine without noticing the parts aren't the right ones.
Without knowing for sure the difference in the pistons, I'm betting this is the correct answer.
Thread Starter
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6th Gear
Joined: Sep 2021
Posts: 13
Likes: 1
From: Queensland
Yes they mentioned this would be the result. My question though is if they now change to the correct kit, is there going to be any long term side effects from their mistake, or no issue at all?
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Grand HDF Member
Joined: Jul 2007
Posts: 3,740
Likes: 8,537
From: Bates County MO
Deck height is the issue. Piston pin height is 1/2 of the stroke distance delta (1/8") , so pin height for a 107 piston is 1/2 of 1/8", or 1/16" (.0625"). This drops the compression from 11:1 to 9.75:1.
Let them fix it.
Let them fix it.
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Seasoned HDF Member
Joined: Jun 2019
Posts: 10,036
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From: SE Michigan
if you don't mind an opinion, you have two issues
one....your bike has incompatible parts, the likely outcome is no big deal, get the correction made and you'll probably be fine
second issue....you have a partner who sounds less like a mechanic, and more of what mechanics lovingly refer to as 'parts changers'
it sounds you like you have two changes to make now
one....your bike has incompatible parts, the likely outcome is no big deal, get the correction made and you'll probably be fine
second issue....you have a partner who sounds less like a mechanic, and more of what mechanics lovingly refer to as 'parts changers'
it sounds you like you have two changes to make now
Thread Starter
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6th Gear
Joined: Sep 2021
Posts: 13
Likes: 1
From: Queensland
if you don't mind an opinion, you have two issues
one....your bike has incompatible parts, the likely outcome is no big deal, get the correction made and you'll probably be fine
second issue....you have a partner who sounds less like a mechanic, and more of what mechanics lovingly refer to as 'parts changers'
it sounds you like you have two changes to make now
one....your bike has incompatible parts, the likely outcome is no big deal, get the correction made and you'll probably be fine
second issue....you have a partner who sounds less like a mechanic, and more of what mechanics lovingly refer to as 'parts changers'
it sounds you like you have two changes to make now
And you are right about the mechanic. Pity when you want to support your local dealer.