Champion spark plug #810
Seasoned HDF Member
Joined: Mar 2010
Posts: 38,543
Likes: 6,418
From: Honah Lee
Read your service manual. On mine, there is an exact looking NGK as the Harley plug. However the ohm resistor is about half what Harley plug is. On mne, that is how the knock sensor works. So if you really get down on it, you need this system to work. Not but a few dollars different. And truly, a Harley FI bike is easy on plugs. They will easily go 50K.
Last edited by Jackie Paper; Sep 14, 2018 at 10:18 AM.
Road Warrior
Joined: Nov 2014
Posts: 1,962
Likes: 140
From: NY
FYI,if i am not mistaken Champion mfg's spark plugs for HD.
To ans your question yes champions 810 is proper std plug for your 2013 HD ,gap to .040" per Champion online app cht .
The std HD / champ-810 plugs lasted 20k miles in my HD including having to reset gap @ 10k miles due to gap erosion.
Use a little anti seize on the sparkplug threads to ensure you dont have any issues removing them @ a later date esp if you choose to try dbl plat or iridium plugs that last a lot longer thus will be in the motor much longer before removing.
I'm running HD's dbl plat plugs that are = to champions 7972 dbl=plat plugs.
Below i listed all plugs avail from Champion for your / HD TC motors including better longer lasting choices then the std 810 plugs your asking about.
But i don't if they fit HD's new M8 4 valves per cyl motor that was just released.
Scott
* STD PLUG-810/TYPE-RA8HC/GAP-.040"
LAST MAX OF 20K MILES INCLUDING RE-GAPPING 2 10K MILES DUE TO GAP EROSION.
* DBL PLATINUM PT#7972 / TYPE-RA8PHP/GAP .040"
LAST 60K TO AS LONG AS 100K MILES IN AUTOMOTIVE APP.
* IRIDIUM PT#9701 / TYPE-RA8WHP/GAP-.040"
LASTS OVER 100K MILES IN AUTOMOTIVE APP & TAKES LESS POWER/CURRENT TO FIRE.
* POWER-SPORT PT#8812-1 / TYPE-8812 /GAP-.040
SPECIFICALLY DESIGNED FOR POWER SPORT / MOTORCYCLE APPS.
Outstanding HDF Member
Joined: Sep 2010
Posts: 2,630
Likes: 185
From: Mountain West, Big Sky Country
i got one bike, that almost refuses to run if it has HD plugs in it. it sputters, fuel economy drops, surges. just plain acts up. change plugs and it runs like new.
it likes champion or autolite plugs. been that way for years. bike is an 04.
what could explain this? never had this with any other HD bike.
it likes champion or autolite plugs. been that way for years. bike is an 04.
what could explain this? never had this with any other HD bike.
Thread Starter
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Road Captain
Joined: Mar 2013
Posts: 530
Likes: 57
From: The South
============================
FYI,if i am not mistaken Champion mfg's spark plugs for HD.
To ans your question yes champions 810 is proper std plug for your 2013 HD ,gap to .040" per Champion online app cht .
The std HD / champ-810 plugs lasted 20k miles in my HD including having to reset gap @ 10k miles due to gap erosion.
Use a little anti seize on the sparkplug threads to ensure you dont have any issues removing them @ a later date esp if you choose to try dbl plat or iridium plugs that last a lot longer thus will be in the motor much longer before removing.
I'm running HD's dbl plat plugs that are = to champions 7972 dbl=plat plugs.
Below i listed all plugs avail from Champion for your / HD TC motors including better longer lasting choices then the std 810 plugs your asking about.
But i don't if they fit HD's new M8 4 valves per cyl motor that was just released.
Scott
* STD PLUG-810/TYPE-RA8HC/GAP-.040"
LAST MAX OF 20K MILES INCLUDING RE-GAPPING 2 10K MILES DUE TO GAP EROSION.
* DBL PLATINUM PT#7972 / TYPE-RA8PHP/GAP .040"
LAST 60K TO AS LONG AS 100K MILES IN AUTOMOTIVE APP.
* IRIDIUM PT#9701 / TYPE-RA8WHP/GAP-.040"
LASTS OVER 100K MILES IN AUTOMOTIVE APP & TAKES LESS POWER/CURRENT TO FIRE.
* POWER-SPORT PT#8812-1 / TYPE-8812 /GAP-.040
SPECIFICALLY DESIGNED FOR POWER SPORT / MOTORCYCLE APPS.
FYI,if i am not mistaken Champion mfg's spark plugs for HD.
To ans your question yes champions 810 is proper std plug for your 2013 HD ,gap to .040" per Champion online app cht .
The std HD / champ-810 plugs lasted 20k miles in my HD including having to reset gap @ 10k miles due to gap erosion.
Use a little anti seize on the sparkplug threads to ensure you dont have any issues removing them @ a later date esp if you choose to try dbl plat or iridium plugs that last a lot longer thus will be in the motor much longer before removing.
I'm running HD's dbl plat plugs that are = to champions 7972 dbl=plat plugs.
Below i listed all plugs avail from Champion for your / HD TC motors including better longer lasting choices then the std 810 plugs your asking about.
But i don't if they fit HD's new M8 4 valves per cyl motor that was just released.
Scott
* STD PLUG-810/TYPE-RA8HC/GAP-.040"
LAST MAX OF 20K MILES INCLUDING RE-GAPPING 2 10K MILES DUE TO GAP EROSION.
* DBL PLATINUM PT#7972 / TYPE-RA8PHP/GAP .040"
LAST 60K TO AS LONG AS 100K MILES IN AUTOMOTIVE APP.
* IRIDIUM PT#9701 / TYPE-RA8WHP/GAP-.040"
LASTS OVER 100K MILES IN AUTOMOTIVE APP & TAKES LESS POWER/CURRENT TO FIRE.
* POWER-SPORT PT#8812-1 / TYPE-8812 /GAP-.040
SPECIFICALLY DESIGNED FOR POWER SPORT / MOTORCYCLE APPS.
Grand HDF Member
Joined: Dec 2007
Posts: 4,999
Likes: 55
From: Bay Area
i got one bike, that almost refuses to run if it has HD plugs in it. it sputters, fuel economy drops, surges. just plain acts up. change plugs and it runs like new.
it likes champion or autolite plugs. been that way for years. bike is an 04.
what could explain this? never had this with any other HD bike.
it likes champion or autolite plugs. been that way for years. bike is an 04.
what could explain this? never had this with any other HD bike.
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Stellar HDF Member
Joined: May 2015
Posts: 2,095
Likes: 304
From: mid Michigan
After 13000 miles this year I cleaned the Harley plugs with sand paper. They where only out of spec by .001 so I left them that way , figuire I'll put new in the spring that's in the cupboard waiting.
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Seasoned HDF Member
Joined: Mar 2010
Posts: 38,543
Likes: 6,418
From: Honah Lee
If there is anything wrong with a plug, the bike will throw a code. Just replace is better
