From: John Corliss on
Anybody know what year Harley switched from short throw to long throw
plugs for shovelheads? I used to know the answer but now that I own a
Victory, that kind of thing is leaking out of my brain.

--
John "blood flowing from ears" Corliss BS206
From: John Corliss on
Frank wrote:
> John Corliss wrote:
>> Anybody know what year Harley switched from short throw to long throw
>> plugs for shovelheads? I used to know the answer but now that I own a
>> Victory, that kind of thing is leaking out of my brain.
>>
>
> Don't know if this helps but I believe they started using the 5RL in
> '82. Prior to that they ran with the 5R6A plug

Thanks for replying, Frank.

Well, I found this page:

http://www.harley-performance.com/harley-spark-plug.html

which says:

1947-1974 shovels and pans used a 4R or 4R5 "H-D Standard" plug, no
cross reference for Champions. I ran champions in my old '69 shovel
before I had the heads converted to long throw, so I know there was a
part number for short throw shovelheads (I've always preferred Champions
by the way.)
1975-1981 shovels used a 5R6A "H-D Standard" plug and a RN12YC Champion.
1982-1984 shovels used a 5RL "H-D Standard" plug and a RN13LYC Champion.

Still don't know which of these plugs are long throw though. Safe bet
that the 82-84 plugs are.

It kinda looks like '75 was the first year for long throw plugs. Dave's
bike is a '75 FLH.

--
John Corliss BS206
From: Snag on
John Corliss wrote:
> Frank wrote:
>> John Corliss wrote:
>>> Anybody know what year Harley switched from short throw to long
>>> throw plugs for shovelheads? I used to know the answer but now that
>>> I own a Victory, that kind of thing is leaking out of my brain.
>>>
>>
>> Don't know if this helps but I believe they started using the 5RL in
>> '82. Prior to that they ran with the 5R6A plug
>
> Thanks for replying, Frank.
>
> Well, I found this page:
>
> http://www.harley-performance.com/harley-spark-plug.html
>
> which says:
>
> 1947-1974 shovels and pans used a 4R or 4R5 "H-D Standard" plug, no
> cross reference for Champions. I ran champions in my old '69 shovel
> before I had the heads converted to long throw, so I know there was a
> part number for short throw shovelheads (I've always preferred
> Champions by the way.)
> 1975-1981 shovels used a 5R6A "H-D Standard" plug and a RN12YC
> Champion. 1982-1984 shovels used a 5RL "H-D Standard" plug and a
> RN13LYC Champion.
> Still don't know which of these plugs are long throw though. Safe bet
> that the 82-84 plugs are.
>
> It kinda looks like '75 was the first year for long throw plugs.
> Dave's bike is a '75 FLH.

I know my '76 used RN12YC plugs , which are long reach . My '90 Evojo uses
that same plug . On the other hand , Chuck Eaves bike ('79 , I think) has
the early heads which take a short reach plug .
I ran across a website a while back that had a ton of good info on the
different Shovel heads . IIRC there were three styles and the mid run heads
were considered the best .
--

Snag aka OSG #1
'90 Ultra , "??"
BS132 SENS NEWT
none to one to reply


From: Chuck Eaves on

"Snag" <snagone(a)bellsouth.net> wrote in message
news:HgOSh.536$Pq5.376(a)bignews6.bellsouth.net...
> John Corliss wrote:
>> Frank wrote:
>>> John Corliss wrote:
>>>> Anybody know what year Harley switched from short throw to long
>>>> throw plugs for shovelheads? I used to know the answer but now that
>>>> I own a Victory, that kind of thing is leaking out of my brain.
>>>>
>>>
>>> Don't know if this helps but I believe they started using the 5RL in
>>> '82. Prior to that they ran with the 5R6A plug
>>
>> Thanks for replying, Frank.
>>
>> Well, I found this page:
>>
>> http://www.harley-performance.com/harley-spark-plug.html
>>
>> which says:
>>
>> 1947-1974 shovels and pans used a 4R or 4R5 "H-D Standard" plug, no
>> cross reference for Champions. I ran champions in my old '69 shovel
>> before I had the heads converted to long throw, so I know there was a
>> part number for short throw shovelheads (I've always preferred
>> Champions by the way.)
>> 1975-1981 shovels used a 5R6A "H-D Standard" plug and a RN12YC
>> Champion. 1982-1984 shovels used a 5RL "H-D Standard" plug and a
>> RN13LYC Champion.
>> Still don't know which of these plugs are long throw though. Safe bet
>> that the 82-84 plugs are.
>>
>> It kinda looks like '75 was the first year for long throw plugs.
>> Dave's bike is a '75 FLH.
>
> I know my '76 used RN12YC plugs , which are long reach . My '90 Evojo
> uses that same plug . On the other hand , Chuck Eaves bike ('79 , I think)
> has the early heads which take a short reach plug .
> I ran across a website a while back that had a ton of good info on the
> different Shovel heads . IIRC there were three styles and the mid run
> heads were considered the best .
> --


This is not the one I was looking for, but it's all I could find. The one I
wanted had pics and much more info>
http://www.bamph.com/rmh/heads_shovel.htm


--
ChuckEaves
78 FLH Shovel-in-Progress
SENS BS#267


From: Snag on
Chuck Eaves wrote:
> "Snag" <snagone(a)bellsouth.net> wrote in message
> news:HgOSh.536$Pq5.376(a)bignews6.bellsouth.net...
>> John Corliss wrote:
>>> Frank wrote:
>>>> John Corliss wrote:
>>>>> Anybody know what year Harley switched from short throw to long
>>>>> throw plugs for shovelheads? I used to know the answer but now
>>>>> that I own a Victory, that kind of thing is leaking out of my
>>>>> brain.
>>>>
>>>> Don't know if this helps but I believe they started using the 5RL
>>>> in '82. Prior to that they ran with the 5R6A plug
>>>
>>> Thanks for replying, Frank.
>>>
>>> Well, I found this page:
>>>
>>> http://www.harley-performance.com/harley-spark-plug.html
>>>
>>> which says:
>>>
>>> 1947-1974 shovels and pans used a 4R or 4R5 "H-D Standard" plug, no
>>> cross reference for Champions. I ran champions in my old '69 shovel
>>> before I had the heads converted to long throw, so I know there was
>>> a part number for short throw shovelheads (I've always preferred
>>> Champions by the way.)
>>> 1975-1981 shovels used a 5R6A "H-D Standard" plug and a RN12YC
>>> Champion. 1982-1984 shovels used a 5RL "H-D Standard" plug and a
>>> RN13LYC Champion.
>>> Still don't know which of these plugs are long throw though. Safe
>>> bet that the 82-84 plugs are.
>>>
>>> It kinda looks like '75 was the first year for long throw plugs.
>>> Dave's bike is a '75 FLH.
>>
>> I know my '76 used RN12YC plugs , which are long reach . My '90
>> Evojo uses that same plug . On the other hand , Chuck Eaves bike
>> ('79 , I think) has the early heads which take a short reach plug .
>> I ran across a website a while back that had a ton of good info on
>> the different Shovel heads . IIRC there were three styles and the
>> mid run heads were considered the best .
>> --
>
>
> This is not the one I was looking for, but it's all I could find. The one
> I wanted had pics and much more info>
> http://www.bamph.com/rmh/heads_shovel.htm

That's probably where i got the info ... Guess which type are out in my
shed ?


--

Snag aka OSG #1
'90 Ultra , "??"
BS132 SENS NEWT
none to one to reply


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