Aftermarket Knucklehead cylinders

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myers1960
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Aftermarket Knucklehead cylinders

#1

Post by myers1960 » Sun Jul 21, 2019 4:44 pm

What is the best aftermarket FL Knucklehead cylinder made?
I see postings and conversations on a number of forums speaking to the problems with aftermarket cylinders.
Are there any aftermarket cylinders with a good proven track record?



Buddhahoodvatoloco
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Re: Aftermarket Knucklehead cylinders

#2

Post by Buddhahoodvatoloco » Sun Jul 21, 2019 10:05 pm

Al Repops are dicey at best, Think the company name was House of Horse power, they where out Sweden, those did perform fairly well. Storied history on them, which is noted/addressed on here some where.

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Re: Aftermarket Knucklehead cylinders

#3

Post by Larry » Mon Jul 22, 2019 1:53 am

I took a chance and installed V Twin cylinders with fitted JCC pistons on a knuck. Plug and play, no hassles.

Gunny
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Re: Aftermarket Knucklehead cylinders

#4

Post by Gunny » Tue Jul 23, 2019 6:24 am

Now you have https://www.motortechnic-mfg.com/?fbcli ... dzD32et1kM

German quality made and distributed in U.S. just contact them they are really fast to answer.

Buddhahoodvatoloco
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Re: Aftermarket Knucklehead cylinders

#5

Post by Buddhahoodvatoloco » Tue Jul 23, 2019 2:25 pm

Quality shit.. :lol: :lol: [/b]
Gunny wrote:
Tue Jul 23, 2019 6:24 am
Now you have https://www.motortechnic-mfg.com/?fbcli ... dzD32et1kM

German quality made and distributed in U.S. just contact them they are really fast to answer.

RooDog
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Re: Aftermarket Knucklehead cylinders

#6

Post by RooDog » Tue Jul 23, 2019 2:39 pm

Buddhahoodvatoloco wrote:
Tue Jul 23, 2019 2:25 pm
Quality shit.. :lol: :lol: [/b]
Gunny wrote:
Tue Jul 23, 2019 6:24 am
Now you have https://www.motortechnic-mfg.com/?fbcli ... dzD32et1kM

German quality made and distributed in U.S. just contact them they are really fast to answer.
From their "Contact" page:
Motortechnic Manufacturing ® USA

V-TWIN MFG ®

Tedd Cycle, Inc.

436A Robinson Ave.

Newburgh, New York 12550

USA

Now, I had a set of V-Twin's Panny rocker arms, looked exactly like what these guys are selling with the yellow brass caps, and though looking like they were well made were crap, the rockers were clocked wrong, and my stock pushrods would not fit, needing shorter PRs just to install 'em. Had to sell them on eBay, at a loss, just to be rid of them. Makes me suspect everything they make.....
....RooDog....

PS: Got a set of V-2's jugs & pistons for my Panny, timing cover, and kicker cover too, and they are all quite OK, so, you can never tell what will be good, and what will be crap.

myers1960
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Re: Aftermarket Knucklehead cylinders

#7

Post by myers1960 » Sun Jul 28, 2019 3:39 am

Thanks for the replys. I contacted Motortechnic. They say they will have replica 74" Knuckle cylinders out in September.
They couldn't provide pricing yet.

white1j0
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Re: Aftermarket Knucklehead cylinders

#8

Post by white1j0 » Sun Jul 28, 2019 4:11 pm

I've been running V-Twin cylinders on my one '47 Knuckle for 3 years now with no problems.

Gunny
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Re: Aftermarket Knucklehead cylinders

#9

Post by Gunny » Thu Aug 01, 2019 5:55 am

myers1960 wrote:
Sun Jul 28, 2019 3:39 am
Thanks for the replys. I contacted Motortechnic. They say they will have replica 74" Knuckle cylinders out in September.
They couldn't provide pricing yet.
Contact Motortechnic Germany they can give more information about the delivery as well anything else.

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Re: Aftermarket Knucklehead cylinders

#10

Post by Carl Olsen » Sun Aug 25, 2019 1:17 pm

S&S makes the best, plus they are made in America. I use them exclusively in all of my 74 knuckle builds. they are expensive, but worth the piece of mind.
Carl

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Re: Aftermarket Knucklehead cylinders

#11

Post by Raytag » Mon Oct 07, 2019 12:38 pm

2 Buddies of mine asked me to finish honing their new chinese 74" shovelcylinder (not incl pistons)
These cylinder were already nicely honed to .002 below std bore.
I have a (very time consuming to set up) jig for boring cylinder on a lathe and with that I can check the base and cylinder.
Cause I`ve seen experienceds times I made it a habit checking wether the bore is straight and in right angle to the base.

In all 4 cylinder the dial-test dropped or climbed by up to .004. All meassured from the base !!
I figure many guys just hone em to std size plus desired play and that`s it. Agony waiting to happen

S&S replacements are usually off less than .0004 but not anymore available :shock:

Ray

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