Primary chain length
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Primary chain length
Just wanted to clarify what length of primary chain I must use:
The KB says 80 links for a 22t motorsprocket.
82 links for a 22t is too long ?
Thanks
Ray
51 Pan FL
clutch basket 37t
tin primary
The KB says 80 links for a 22t motorsprocket.
82 links for a 22t is too long ?
Thanks
Ray
51 Pan FL
clutch basket 37t
tin primary
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Re: Primary chain length
Hi Ray
I thought someone would have helped you before this
I can't help you much
The 61-76 parts book lists 2 primary chains and states one is for 22T motor sprocket, but no data re link count
The 41-54 parts book lists:
40007-36 Front chain, 82 links --1937 to 1954--61", 74" & 80" twins (Solo).
40009-36 Front chain, 80 links SV --1937 to 1954--61", 74" & 80" sidecars
22T motor sprocket normal for sidecar, are you running a sidecar?
BTW can run a late type flat sideplate chain in tin primaries, but can’t run an early chain with waisted sideplates in alum primaries with tensioner shoe.
Nifty
I thought someone would have helped you before this
I can't help you much
The 61-76 parts book lists 2 primary chains and states one is for 22T motor sprocket, but no data re link count
The 41-54 parts book lists:
40007-36 Front chain, 82 links --1937 to 1954--61", 74" & 80" twins (Solo).
40009-36 Front chain, 80 links SV --1937 to 1954--61", 74" & 80" sidecars
22T motor sprocket normal for sidecar, are you running a sidecar?
BTW can run a late type flat sideplate chain in tin primaries, but can’t run an early chain with waisted sideplates in alum primaries with tensioner shoe.
Nifty
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Re: Primary chain length
Nifty,
I`m going to hook up the sidecar in a foreseeable future.
The only hint I found was in the long version of the OEM parts list where it says
40008-36 (82 links solo)
40009-36 (80 links sidecar)
Although the manual speaks of a 20t motorsprocket with sidecar attached.
I will find out and let you know.
May take some weeks cause I`m still enjoying favorable weather overhere.
Yesterday I ordered a straight-shaped 80link from Tsubaki
Some useless information:
This morning I talked to an industrial "chain-man"
Generally he recommends straight side plates. Not those figure 8 sideplates
With even numbered links anyway: Quiter, less wear and they don`t eat up fast any tensioner if in use.
Acc to the specs I provided (80links: 425 1/2” x 5/16” x 8.51 x 2) he made me an offer for a 5 meter long chain for 90 bucks
Incl 4 masterlinks strength 31KN
I questioned him about the master-links cause the chain will spin with 4000rpm and he replied the industry wouldn`t manufacture them unless
they believe in them. Timing chains in cars using master links. Anyway , they do calculate with speed (m/sec) not rpm
In a perfect world ... 1000 hours isn`t a problem ... with a tensioner of course
His calculations showed some 20m/sec speed which demands >12 oildrops/minute.
20m/sec is the max speed for any chain. Interesting. Every chainsaw is faster
12 drops/min ? That would result in a big puddle LOL.
The problem is the lubrication, incl many other factor.
But we all know that.
Ray
I`m going to hook up the sidecar in a foreseeable future.
The only hint I found was in the long version of the OEM parts list where it says
40008-36 (82 links solo)
40009-36 (80 links sidecar)
Although the manual speaks of a 20t motorsprocket with sidecar attached.
I will find out and let you know.
May take some weeks cause I`m still enjoying favorable weather overhere.
Yesterday I ordered a straight-shaped 80link from Tsubaki
Some useless information:
This morning I talked to an industrial "chain-man"
Generally he recommends straight side plates. Not those figure 8 sideplates
With even numbered links anyway: Quiter, less wear and they don`t eat up fast any tensioner if in use.
Acc to the specs I provided (80links: 425 1/2” x 5/16” x 8.51 x 2) he made me an offer for a 5 meter long chain for 90 bucks
Incl 4 masterlinks strength 31KN
I questioned him about the master-links cause the chain will spin with 4000rpm and he replied the industry wouldn`t manufacture them unless
they believe in them. Timing chains in cars using master links. Anyway , they do calculate with speed (m/sec) not rpm
In a perfect world ... 1000 hours isn`t a problem ... with a tensioner of course
His calculations showed some 20m/sec speed which demands >12 oildrops/minute.
20m/sec is the max speed for any chain. Interesting. Every chainsaw is faster
12 drops/min ? That would result in a big puddle LOL.
The problem is the lubrication, incl many other factor.
But we all know that.
Ray
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Re: Primary chain length
Ray, I dealt with this a while back. The answer to my issue was to flip over the chain adjuster shoe to allow use of a tight fitting 80 link on a 22 tooth. You of course won't have the shoe to deal with, but you'll probably need to move your tranny all the way forward. In my case, 82 links was indeed too long, even with adjustment to the max. A different sized mainshaft sprocket will impact fit too. Read this link:
https://www.hydra-glide.net/phpBB3/view ... hp?t=16836
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Re: Primary chain length
Ray....
What sprocket is on the transmission? As small as 20T is available....
What sprocket is on the transmission? As small as 20T is available....
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Re: Primary chain length
I changed the motor sprocket on my '68 from 23T to 24T. Before that I had the tensioner upside-down to take up some slack, but even then I couldn't get the right adjustment. With the 24T I'm running the tensioner right-side-up.
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Re: Primary chain length
Call me a girl, but I'm not brave enough to run a spring clip joiner link on primary chain.
The thought of failure at high RPM and wadded up chain escaping next to my left foot, makes my blood run cold.
Correctly rivetted link, on cut your own, quality, solid-roller chain, I'm up for.
Nifty
The thought of failure at high RPM and wadded up chain escaping next to my left foot, makes my blood run cold.
Correctly rivetted link, on cut your own, quality, solid-roller chain, I'm up for.
Nifty
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Re: Primary chain length
All the early dual chains used by H-D had master links available and were commonly used. Every WR had a master link, no other way for the range of sprockets needed and regularly swapped. With a range from 17-34 teeth no chain was available. Same for Big Twin hillclimbers and TT bikes.nifty wrote: ↑Sun Sep 04, 2022 12:13 am Call me a girl, but I'm not brave enough to run a spring clip joiner link on primary chain.
The thought of failure at high RPM and wadded up chain escaping next to my left foot, makes my blood run cold.
Correctly rivetted link, on cut your own, quality, solid-roller chain, I'm up for.
Nifty
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Re: Primary chain length
What kind of skirt would you like me to wear?RUBONE wrote: ↑Sun Sep 04, 2022 12:48 amAll the early dual chains used by H-D had master links available and were commonly used. Every WR had a master link, no other way for the range of sprockets needed and regularly swapped. With a range from 17-34 teeth no chain was available. Same for Big Twin hillclimbers and TT bikes.nifty wrote: ↑Sun Sep 04, 2022 12:13 am Call me a girl, but I'm not brave enough to run a spring clip joiner link on primary chain.
The thought of failure at high RPM and wadded up chain escaping next to my left foot, makes my blood run cold.
Correctly rivetted link, on cut your own, quality, solid-roller chain, I'm up for.
Nifty
Nifty
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Re: Primary chain length
Maybe that little blue one with the tassels you wore for New Years before!!nifty wrote: ↑Sun Sep 04, 2022 1:05 amWhat kind of skirt would you like me to wear?RUBONE wrote: ↑Sun Sep 04, 2022 12:48 amAll the early dual chains used by H-D had master links available and were commonly used. Every WR had a master link, no other way for the range of sprockets needed and regularly swapped. With a range from 17-34 teeth no chain was available. Same for Big Twin hillclimbers and TT bikes.nifty wrote: ↑Sun Sep 04, 2022 12:13 am Call me a girl, but I'm not brave enough to run a spring clip joiner link on primary chain.
The thought of failure at high RPM and wadded up chain escaping next to my left foot, makes my blood run cold.
Correctly rivetted link, on cut your own, quality, solid-roller chain, I'm up for.
Nifty
Nifty
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Re: Primary chain length
Thanks panhead_kicker
Motor 22
Clutch 37
Trans 22
Rear 51
Ray
I will begin my hack-career with this ratio
Motor 22
Clutch 37
Trans 22
Rear 51
Ray
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Re: Primary chain length
I have witnessed, but not experienced, a snapped primary chain, an idiot with little mechanical skill left it way too loose. It packed up and exploded the aluminum primaries on a later cone shovel. I and a couple others were riding with, somewhat behind, him and he was showing off.nifty wrote: ↑Sun Sep 04, 2022 12:13 am Call me a girl, but I'm not brave enough to run a spring clip joiner link on primary chain.
The thought of failure at high RPM and wadded up chain escaping next to my left foot, makes my blood run cold.
Correctly rivetted link, on cut your own, quality, solid-roller chain, I'm up for.
Nifty
But my point is, at Brown &Sharpe years ago, I was taught that large cylindrical grinders were always fitted with steel guards, not cast iron, due to the energy absorbing malleability of steel rather than cast. So if you have tin primaries, you should be OK!
Andygears
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Re: Primary chain length
As a young idiot, I am an older one now, I once ran an open primary chain. The aluminum Anderson foot peg came loose and wedged itself in the chain, and locked up the engine, but did not break the chain. A lesson learned. When I see the current crop of hipster bike builders with open chain drive primaries, I just shake my head and walk away. Mr Murphy*, and experience, may show them the error in their ways.
....RooDog....
* Google search: "Murphy's Law".
....RooDog....
* Google search: "Murphy's Law".
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Re: Primary chain length
ROO I DONT THINK THEY RIDE FAR.RooDog wrote: ↑Sun Sep 04, 2022 1:24 pm As a young idiot, I am an older one now, I once ran an open primary chain. The aluminum Anderson foot peg came loose and wedged itself in the chain, and locked up the engine, but did not break the chain. A lesson learned. When I see the current crop of hipster bike builders with open chain drive primaries, I just shake my head and walk away. Mr Murphy*, and experience, may show them the error in their ways.
....RooDog....
* Google search: "Murphy's Law".
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Re: Primary chain length
Currently messing with this stuff ....
With a 22t motor sprocket you need a primary chain with 82 links.
80 is much too short
With 82 links and thi 22t motor sprocket you still have enough room to adjust on the transplate
With a 22t trans sprocket the 102 drive chain will become too long.
With a 24t trans sprocket the 102 drive chain will fit but you don`t have much room to adjust in future
No really sure what I should think about this PBI 22t trans sprocket ?
Looks they used a roughing endmill.
Yes, you can feel it.
It fits perfect on the main drive gear though
Ray
With a 22t motor sprocket you need a primary chain with 82 links.
80 is much too short
With 82 links and thi 22t motor sprocket you still have enough room to adjust on the transplate
With a 22t trans sprocket the 102 drive chain will become too long.
With a 24t trans sprocket the 102 drive chain will fit but you don`t have much room to adjust in future
No really sure what I should think about this PBI 22t trans sprocket ?
Looks they used a roughing endmill.
Yes, you can feel it.
It fits perfect on the main drive gear though
Ray
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